1. 04 Apr, 2018 21 commits
    • Alexander Graf's avatar
      lan78xx: Connect phy early · 92571a1a
      Alexander Graf authored
      When using wicked with a lan78xx device attached to the system, we
      end up with ethtool commands issued on the device before an ifup
      got issued. That lead to the following crash:
      
          Unable to handle kernel NULL pointer dereference at virtual address 0000039c
          pgd = ffff800035b30000
          [0000039c] *pgd=0000000000000000
          Internal error: Oops: 96000004 [#1] SMP
          Modules linked in: [...]
          Supported: Yes
          CPU: 3 PID: 638 Comm: wickedd Tainted: G            E      4.12.14-0-default #1
          Hardware name: raspberrypi rpi/rpi, BIOS 2018.03-rc2 02/21/2018
          task: ffff800035e74180 task.stack: ffff800036718000
          PC is at phy_ethtool_ksettings_get+0x20/0x98
          LR is at lan78xx_get_link_ksettings+0x44/0x60 [lan78xx]
          pc : [<ffff0000086f7f30>] lr : [<ffff000000dcca84>] pstate: 20000005
          sp : ffff80003671bb20
          x29: ffff80003671bb20 x28: ffff800035e74180
          x27: ffff000008912000 x26: 000000000000001d
          x25: 0000000000000124 x24: ffff000008f74d00
          x23: 0000004000114809 x22: 0000000000000000
          x21: ffff80003671bbd0 x20: 0000000000000000
          x19: ffff80003671bbd0 x18: 000000000000040d
          x17: 0000000000000001 x16: 0000000000000000
          x15: 0000000000000000 x14: ffffffffffffffff
          x13: 0000000000000000 x12: 0000000000000020
          x11: 0101010101010101 x10: fefefefefefefeff
          x9 : 7f7f7f7f7f7f7f7f x8 : fefefeff31677364
          x7 : 0000000080808080 x6 : ffff80003671bc9c
          x5 : ffff80003671b9f8 x4 : ffff80002c296190
          x3 : 0000000000000000 x2 : 0000000000000000
          x1 : ffff80003671bbd0 x0 : ffff80003671bc00
          Process wickedd (pid: 638, stack limit = 0xffff800036718000)
          Call trace:
          Exception stack(0xffff80003671b9e0 to 0xffff80003671bb20)
          b9e0: ffff80003671bc00 ffff80003671bbd0 0000000000000000 0000000000000000
          ba00: ffff80002c296190 ffff80003671b9f8 ffff80003671bc9c 0000000080808080
          ba20: fefefeff31677364 7f7f7f7f7f7f7f7f fefefefefefefeff 0101010101010101
          ba40: 0000000000000020 0000000000000000 ffffffffffffffff 0000000000000000
          ba60: 0000000000000000 0000000000000001 000000000000040d ffff80003671bbd0
          ba80: 0000000000000000 ffff80003671bbd0 0000000000000000 0000004000114809
          baa0: ffff000008f74d00 0000000000000124 000000000000001d ffff000008912000
          bac0: ffff800035e74180 ffff80003671bb20 ffff000000dcca84 ffff80003671bb20
          bae0: ffff0000086f7f30 0000000020000005 ffff80002c296000 ffff800035223900
          bb00: 0000ffffffffffff 0000000000000000 ffff80003671bb20 ffff0000086f7f30
          [<ffff0000086f7f30>] phy_ethtool_ksettings_get+0x20/0x98
          [<ffff000000dcca84>] lan78xx_get_link_ksettings+0x44/0x60 [lan78xx]
          [<ffff0000087cbc40>] ethtool_get_settings+0x68/0x210
          [<ffff0000087cc0d4>] dev_ethtool+0x214/0x2180
          [<ffff0000087e5008>] dev_ioctl+0x400/0x630
          [<ffff00000879dd00>] sock_do_ioctl+0x70/0x88
          [<ffff00000879f5f8>] sock_ioctl+0x208/0x368
          [<ffff0000082cde10>] do_vfs_ioctl+0xb0/0x848
          [<ffff0000082ce634>] SyS_ioctl+0x8c/0xa8
          Exception stack(0xffff80003671bec0 to 0xffff80003671c000)
          bec0: 0000000000000009 0000000000008946 0000fffff4e841d0 0000aa0032687465
          bee0: 0000aaaafa2319d4 0000fffff4e841d4 0000000032687465 0000000032687465
          bf00: 000000000000001d 7f7fff7f7f7f7f7f 72606b622e71ff4c 7f7f7f7f7f7f7f7f
          bf20: 0101010101010101 0000000000000020 ffffffffffffffff 0000ffff7f510c68
          bf40: 0000ffff7f6a9d18 0000ffff7f44ce30 000000000000040d 0000ffff7f6f98f0
          bf60: 0000fffff4e842c0 0000000000000001 0000aaaafa2c2e00 0000ffff7f6ab000
          bf80: 0000fffff4e842c0 0000ffff7f62a000 0000aaaafa2b9f20 0000aaaafa2c2e00
          bfa0: 0000fffff4e84818 0000fffff4e841a0 0000ffff7f5ad0cc 0000fffff4e841a0
          bfc0: 0000ffff7f44ce3c 0000000080000000 0000000000000009 000000000000001d
          bfe0: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
      
      The culprit is quite simple: The driver tries to access the phy left and right,
      but only actually has a working reference to it when the device is up.
      
      The fix thus is quite simple too: Get a reference to the phy on probe already
      and keep it even when the device is going down.
      
      With this patch applied, I can successfully run wicked on my system and bring
      the interface up and down as many times as I want, without getting NULL pointer
      dereferences in between.
      Signed-off-by: default avatarAlexander Graf <agraf@suse.de>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      92571a1a
    • Jakub Kicinski's avatar
      nfp: add a separate counter for packets with CHECKSUM_COMPLETE · 0df57e60
      Jakub Kicinski authored
      We are currently counting packets with CHECKSUM_COMPLETE as
      "hw_rx_csum_ok".  This is confusing.  Add a new counter.
      To make sure it fits in the same cacheline move the less used
      error counter to a different location.
      Signed-off-by: default avatarJakub Kicinski <jakub.kicinski@netronome.com>
      Reviewed-by: default avatarDirk van der Merwe <dirk.vandermerwe@netronome.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      0df57e60
    • Jon Maloy's avatar
      tipc: Fix missing list initializations in struct tipc_subscription · b714295a
      Jon Maloy authored
      When an item of struct tipc_subscription is created, we fail to
      initialize the two lists aggregated into the struct. This has so far
      never been a problem, since the items are just added to a root
      object by list_add(), which does not require the addee list to be
      pre-initialized. However, syzbot is provoking situations where this
      addition fails, whereupon the attempted removal if the item from
      the list causes a crash.
      
      This problem seems to always have been around, despite that the code
      for creating this object was rewritten in commit 242e82cc ("tipc:
      collapse subscription creation functions"), which is still in net-next.
      
      We fix this for that commit by initializing the two lists properly.
      
      Fixes: 242e82cc ("tipc: collapse subscription creation functions")
      Reported-by: syzbot+0bb443b74ce09197e970@syzkaller.appspotmail.com
      Signed-off-by: default avatarJon Maloy <jon.maloy@ericsson.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      b714295a
    • David S. Miller's avatar
      Merge branch 'ipv6-udp-set-dst-cache-for-a-connected-sk-if-current-not-valid' · f51ffde9
      David S. Miller authored
      Alexey Kodanev says:
      
      ====================
      ipv6: udp: set dst cache for a connected sk if current not valid
      
      A new RTF_CACHE route can be created with the socket's dst cache
      update between the below calls in udpv6_sendmsg(), when datagram
      sending results to ICMPV6_PKT_TOOBIG error:
      
         dst = ip6_sk_dst_lookup_flow(...)
         ...
      release_dst:
          if (dst) {
              if (connected) {
                  ip6_dst_store(sk, dst)
      
      Therefore, the new socket's dst cache reset to the old one on
      "release_dst:".
      
      The first three patches prepare the code to store dst cache
      with ip6_sk_dst_lookup_flow():
      
        * the first patch adds ip6_sk_dst_store_flow() function with
          commonly used source and destiantion addresses checks using
          the flow information.
      
        * the second patch adds a new argument to ip6_sk_dst_lookup_flow()
          and ability to store dst in the socket's cache. Also, the two
          users of the function are updated without enabling the new
          behavior: pingv6_sendmsg() and udpv6_sendmsg().
      
        * the third patch makes 'connected' variable in udpv6_sendmsg()
          to be consistent with ip6_sk_dst_store_flow(), changes its type
          from int to bool.
      
      The last patch contains the actual fix that removes sk dst cache
      update in the end of udpv6_sendmsg(), and allows to do it in
      ip6_sk_dst_lookup_flow().
      
      v6: * use bool type for a new parameter in ip_sk_dst_lookup_flow()
          * add one more patch to convert 'connected' variable in
            udpv6_sendmsg() from int to bool type. If it shouldn't be
            here I will resend it when the net-next is opened.
      
      v5: * relocate ip6_sk_dst_store_flow() to net/ipv6/route.c and
            rename ip6_dst_store_flow() to ip6_sk_dst_store_flow() as
            suggested by Martin
      
      v4: * fix the error in the build of ip_dst_store_flow() reported by
            kbuild test robot due to missing checks for CONFIG_IPV6: add
            new function to ip6_output.c instead of ip6_route.h
          * add 'const' to struct flowi6 in ip6_dst_store_flow()
          * minor commit messages fixes
      
      v3: * instead of moving ip6_dst_store() above udp_v6_send_skb(),
            update socket's dst cache inside ip6_sk_dst_lookup_flow()
            if the current one is invalid
          * the issue not reproduced in 4.1, but starting from 4.2. Add
            one more 'Fixes:' commit that creates new RTF_CACHE route.
            Though, it is also mentioned in the first one
      ====================
      Acked-by: default avatarMartin KaFai Lau <kafai@fb.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      f51ffde9
    • Alexey Kodanev's avatar
      ipv6: udp: set dst cache for a connected sk if current not valid · 4f858c56
      Alexey Kodanev authored
      A new RTF_CACHE route can be created between ip6_sk_dst_lookup_flow()
      and ip6_dst_store() calls in udpv6_sendmsg(), when datagram sending
      results to ICMPV6_PKT_TOOBIG error:
      
          udp_v6_send_skb(), for example with vti6 tunnel:
              vti6_xmit(), get ICMPV6_PKT_TOOBIG error
                  skb_dst_update_pmtu(), can create a RTF_CACHE clone
                  icmpv6_send()
          ...
          udpv6_err()
              ip6_sk_update_pmtu()
                 ip6_update_pmtu(), can create a RTF_CACHE clone
                 ...
                 ip6_datagram_dst_update()
                      ip6_dst_store()
      
      And after commit 33c162a9 ("ipv6: datagram: Update dst cache of
      a connected datagram sk during pmtu update"), the UDPv6 error handler
      can update socket's dst cache, but it can happen before the update in
      the end of udpv6_sendmsg(), preventing getting the new dst cache on
      the next udpv6_sendmsg() calls.
      
      In order to fix it, save dst in a connected socket only if the current
      socket's dst cache is invalid.
      
      The previous patch prepared ip6_sk_dst_lookup_flow() to do that with
      the new argument, and this patch enables it in udpv6_sendmsg().
      
      Fixes: 33c162a9 ("ipv6: datagram: Update dst cache of a connected datagram sk during pmtu update")
      Fixes: 45e4fd26 ("ipv6: Only create RTF_CACHE routes after encountering pmtu exception")
      Signed-off-by: default avatarAlexey Kodanev <alexey.kodanev@oracle.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      4f858c56
    • Alexey Kodanev's avatar
      ipv6: udp: convert 'connected' to bool type in udpv6_sendmsg() · 9f542f61
      Alexey Kodanev authored
      This should make it consistent with ip6_sk_dst_lookup_flow()
      that is accepting the new 'connected' parameter of type bool.
      Signed-off-by: default avatarAlexey Kodanev <alexey.kodanev@oracle.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      9f542f61
    • Alexey Kodanev's avatar
      ipv6: allow to cache dst for a connected sk in ip6_sk_dst_lookup_flow() · 96818159
      Alexey Kodanev authored
      Add 'connected' parameter to ip6_sk_dst_lookup_flow() and update
      the cache only if ip6_sk_dst_check() returns NULL and a socket
      is connected.
      
      The function is used as before, the new behavior for UDP sockets
      in udpv6_sendmsg() will be enabled in the next patch.
      Signed-off-by: default avatarAlexey Kodanev <alexey.kodanev@oracle.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      96818159
    • Alexey Kodanev's avatar
      ipv6: add a wrapper for ip6_dst_store() with flowi6 checks · 7d6850f7
      Alexey Kodanev authored
      Move commonly used pattern of ip6_dst_store() usage to a separate
      function - ip6_sk_dst_store_flow(), which will check the addresses
      for equality using the flow information, before saving them.
      
      There is no functional changes in this patch. In addition, it will
      be used in the next patch, in ip6_sk_dst_lookup_flow().
      Signed-off-by: default avatarAlexey Kodanev <alexey.kodanev@oracle.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      7d6850f7
    • Russell King's avatar
      net: phy: marvell10g: add thermal hwmon device · 0d3ad854
      Russell King authored
      Add a thermal monitoring device for the Marvell 88x3310, which updates
      once a second.  We also need to hook into the suspend/resume mechanism
      to ensure that the thermal monitoring is reconfigured when we resume.
      Suggested-by: default avatarAndrew Lunn <andrew@lunn.ch>
      Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      0d3ad854
    • Eric Dumazet's avatar
      pptp: remove a buggy dst release in pptp_connect() · bfacfb45
      Eric Dumazet authored
      Once dst has been cached in socket via sk_setup_caps(),
      it is illegal to call ip_rt_put() (or dst_release()),
      since sk_setup_caps() did not change dst refcount.
      
      We can still dereference it since we hold socket lock.
      
      Caugth by syzbot :
      
      BUG: KASAN: use-after-free in atomic_dec_return include/asm-generic/atomic-instrumented.h:198 [inline]
      BUG: KASAN: use-after-free in dst_release+0x27/0xa0 net/core/dst.c:185
      Write of size 4 at addr ffff8801c54dc040 by task syz-executor4/20088
      
      CPU: 1 PID: 20088 Comm: syz-executor4 Not tainted 4.16.0+ #376
      Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
      Call Trace:
       __dump_stack lib/dump_stack.c:17 [inline]
       dump_stack+0x1a7/0x27d lib/dump_stack.c:53
       print_address_description+0x73/0x250 mm/kasan/report.c:256
       kasan_report_error mm/kasan/report.c:354 [inline]
       kasan_report+0x23c/0x360 mm/kasan/report.c:412
       check_memory_region_inline mm/kasan/kasan.c:260 [inline]
       check_memory_region+0x137/0x190 mm/kasan/kasan.c:267
       kasan_check_write+0x14/0x20 mm/kasan/kasan.c:278
       atomic_dec_return include/asm-generic/atomic-instrumented.h:198 [inline]
       dst_release+0x27/0xa0 net/core/dst.c:185
       sk_dst_set include/net/sock.h:1812 [inline]
       sk_dst_reset include/net/sock.h:1824 [inline]
       sock_setbindtodevice net/core/sock.c:610 [inline]
       sock_setsockopt+0x431/0x1b20 net/core/sock.c:707
       SYSC_setsockopt net/socket.c:1845 [inline]
       SyS_setsockopt+0x2ff/0x360 net/socket.c:1828
       do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287
       entry_SYSCALL_64_after_hwframe+0x42/0xb7
      RIP: 0033:0x4552d9
      RSP: 002b:00007f4878126c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
      RAX: ffffffffffffffda RBX: 00007f48781276d4 RCX: 00000000004552d9
      RDX: 0000000000000019 RSI: 0000000000000001 RDI: 0000000000000013
      RBP: 000000000072bea0 R08: 0000000000000010 R09: 0000000000000000
      R10: 00000000200010c0 R11: 0000000000000246 R12: 00000000ffffffff
      R13: 0000000000000526 R14: 00000000006fac30 R15: 0000000000000000
      
      Allocated by task 20088:
       save_stack+0x43/0xd0 mm/kasan/kasan.c:447
       set_track mm/kasan/kasan.c:459 [inline]
       kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:552
       kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:489
       kmem_cache_alloc+0x12e/0x760 mm/slab.c:3542
       dst_alloc+0x11f/0x1a0 net/core/dst.c:104
       rt_dst_alloc+0xe9/0x540 net/ipv4/route.c:1520
       __mkroute_output net/ipv4/route.c:2265 [inline]
       ip_route_output_key_hash_rcu+0xa49/0x2c60 net/ipv4/route.c:2493
       ip_route_output_key_hash+0x20b/0x370 net/ipv4/route.c:2322
       __ip_route_output_key include/net/route.h:126 [inline]
       ip_route_output_flow+0x26/0xa0 net/ipv4/route.c:2577
       ip_route_output_ports include/net/route.h:163 [inline]
       pptp_connect+0xa84/0x1170 drivers/net/ppp/pptp.c:453
       SYSC_connect+0x213/0x4a0 net/socket.c:1639
       SyS_connect+0x24/0x30 net/socket.c:1620
       do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287
       entry_SYSCALL_64_after_hwframe+0x42/0xb7
      
      Freed by task 20082:
       save_stack+0x43/0xd0 mm/kasan/kasan.c:447
       set_track mm/kasan/kasan.c:459 [inline]
       __kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:520
       kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:527
       __cache_free mm/slab.c:3486 [inline]
       kmem_cache_free+0x83/0x2a0 mm/slab.c:3744
       dst_destroy+0x266/0x380 net/core/dst.c:140
       dst_destroy_rcu+0x16/0x20 net/core/dst.c:153
       __rcu_reclaim kernel/rcu/rcu.h:178 [inline]
       rcu_do_batch kernel/rcu/tree.c:2675 [inline]
       invoke_rcu_callbacks kernel/rcu/tree.c:2930 [inline]
       __rcu_process_callbacks kernel/rcu/tree.c:2897 [inline]
       rcu_process_callbacks+0xd6c/0x17b0 kernel/rcu/tree.c:2914
       __do_softirq+0x2d7/0xb85 kernel/softirq.c:285
      
      The buggy address belongs to the object at ffff8801c54dc000
       which belongs to the cache ip_dst_cache of size 168
      The buggy address is located 64 bytes inside of
       168-byte region [ffff8801c54dc000, ffff8801c54dc0a8)
      The buggy address belongs to the page:
      page:ffffea0007153700 count:1 mapcount:0 mapping:ffff8801c54dc000 index:0x0
      flags: 0x2fffc0000000100(slab)
      raw: 02fffc0000000100 ffff8801c54dc000 0000000000000000 0000000100000010
      raw: ffffea0006b34b20 ffffea0006b6c1e0 ffff8801d674a1c0 0000000000000000
      page dumped because: kasan: bad access detected
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      bfacfb45
    • Florian Fainelli's avatar
      net: dsa: mt7530: Use NULL instead of plain integer · 18bd5949
      Florian Fainelli authored
      We would be passing 0 instead of NULL as the rsp argument to
      mt7530_fdb_cmd(), fix that.
      
      Fixes: b8f126a8 ("net-next: dsa: add dsa support for Mediatek MT7530 switch")
      Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
      Acked-by: default avatarSean Wang <sean.wang@mediatek.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      18bd5949
    • Florian Fainelli's avatar
      net: dsa: b53: Fix sparse warnings in b53_mmap.c · 861690d0
      Florian Fainelli authored
      sparse complains about the following warnings:
      
      drivers/net/dsa/b53/b53_mmap.c:33:31: warning: incorrect type in
      initializer (different address spaces)
      drivers/net/dsa/b53/b53_mmap.c:33:31:    expected unsigned char
      [noderef] [usertype] <asn:2>*regs
      drivers/net/dsa/b53/b53_mmap.c:33:31:    got void *priv
      
      and indeed, while what we are doing is functional, we are dereferencing
      a void * pointer into a void __iomem * which is not great. Just use the
      defined b53_mmap_priv structure which holds our register base and use
      that.
      
      Fixes: 967dd82f ("net: dsa: b53: Add support for Broadcom RoboSwitch")
      Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      861690d0
    • Cong Wang's avatar
      af_unix: remove redundant lockdep class · 3848ec5d
      Cong Wang authored
      After commit 581319c5 ("net/socket: use per af lockdep classes for sk queues")
      sock queue locks now have per-af lockdep classes, including unix socket.
      It is no longer necessary to workaround it.
      
      I noticed this while looking at a syzbot deadlock report, this patch
      itself doesn't fix it (this is why I don't add Reported-by).
      
      Fixes: 581319c5 ("net/socket: use per af lockdep classes for sk queues")
      Cc: Paolo Abeni <pabeni@redhat.com>
      Signed-off-by: default avatarCong Wang <xiyou.wangcong@gmail.com>
      Acked-by: default avatarPaolo Abeni <pabeni@redhat.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      3848ec5d
    • David S. Miller's avatar
      Merge branch 'net-Broadcom-drivers-sparse-fixes' · 51508179
      David S. Miller authored
      Florian Fainelli says:
      
      ====================
      net: Broadcom drivers sparse fixes
      
      This patch series fixes the same warning reported by sparse in bcmsysport and
      bcmgenet in the code that deals with inserting the TX checksum pointers:
      
      drivers/net/ethernet/broadcom/bcmsysport.c:1155:26: warning: cast from restricted __be16
      drivers/net/ethernet/broadcom/bcmsysport.c:1155:26: warning: incorrect type in argument 1 (different base types)
      drivers/net/ethernet/broadcom/bcmsysport.c:1155:26:    expected unsigned short [unsigned] [usertype] val
      drivers/net/ethernet/broadcom/bcmsysport.c:1155:26:    got restricted __be16 [usertype] protocol
      
      This patch fixes both issues by using the same construct and not swapping
      skb->protocol but instead the values we are checking against.
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      51508179
    • Florian Fainelli's avatar
      net: systemport: Fix sparse warnings in bcm_sysport_insert_tsb() · c0eb0558
      Florian Fainelli authored
      skb->protocol is a __be16 which we would be calling htons() against,
      while this is not wrong per-se as it correctly results in swapping the
      value on LE hosts, this still upsets sparse. Adopt a similar pattern to
      what other drivers do and just assign ip_ver to skb->protocol, and then
      use htons() against the different constants such that the compiler can
      resolve the values at build time.
      
      Fixes: 80105bef ("net: systemport: add Broadcom SYSTEMPORT Ethernet MAC driver")
      Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      c0eb0558
    • Florian Fainelli's avatar
      net: bcmgenet: Fix sparse warnings in bcmgenet_put_tx_csum() · 6f894211
      Florian Fainelli authored
      skb->protocol is a __be16 which we would be calling htons() against,
      while this is not wrong per-se as it correctly results in swapping the
      value on LE hosts, this still upsets sparse. Adopt a similar pattern to
      what other drivers do and just assign ip_ver to skb->protocol, and then
      use htons() against the different constants such that the compiler can
      resolve the values at build time.
      
      Fixes: 1c1008c7 ("net: bcmgenet: add main driver file")
      Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      6f894211
    • David Howells's avatar
      rxrpc: Fix undefined packet handling · b41d7cfe
      David Howells authored
      By analogy with other Rx implementations, RxRPC packet types 9, 10 and 11
      should just be discarded rather than being aborted like other undefined
      packet types.
      Reported-by: default avatarJeffrey Altman <jaltman@auristor.com>
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      b41d7cfe
    • Linus Torvalds's avatar
      Merge branch 'userns-linus' of... · 17dec0a9
      Linus Torvalds authored
      Merge branch 'userns-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
      
      Pull namespace updates from Eric Biederman:
       "There was a lot of work this cycle fixing bugs that were discovered
        after the merge window and getting everything ready where we can
        reasonably support fully unprivileged fuse. The bug fixes you already
        have and much of the unprivileged fuse work is coming in via other
        trees.
      
        Still left for fully unprivileged fuse is figuring out how to cleanly
        handle .set_acl and .get_acl in the legacy case, and properly handling
        of evm xattrs on unprivileged mounts.
      
        Included in the tree is a cleanup from Alexely that replaced a linked
        list with a statically allocated fix sized array for the pid caches,
        which simplifies and speeds things up.
      
        Then there is are some cleanups and fixes for the ipc namespace. The
        motivation was that in reviewing other code it was discovered that
        access ipc objects from different pid namespaces recorded pids in such
        a way that when asked the wrong pids were returned. In the worst case
        there has been a measured 30% performance impact for sysvipc
        semaphores. Other test cases showed no measurable performance impact.
        Manfred Spraul and Davidlohr Bueso who tend to work on sysvipc
        performance both gave the nod that this is good enough.
      
        Casey Schaufler and James Morris have given their approval to the LSM
        side of the changes.
      
        I simplified the types and the code dealing with sysvipc to pass just
        kern_ipc_perm for all three types of ipc. Which reduced the header
        dependencies throughout the kernel and simplified the lsm code.
      
        Which let me work on the pid fixes without having to worry about
        trivial changes causing complete kernel recompiles"
      
      * 'userns-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
        ipc/shm: Fix pid freeing.
        ipc/shm: fix up for struct file no longer being available in shm.h
        ipc/smack: Tidy up from the change in type of the ipc security hooks
        ipc: Directly call the security hook in ipc_ops.associate
        ipc/sem: Fix semctl(..., GETPID, ...) between pid namespaces
        ipc/msg: Fix msgctl(..., IPC_STAT, ...) between pid namespaces
        ipc/shm: Fix shmctl(..., IPC_STAT, ...) between pid namespaces.
        ipc/util: Helpers for making the sysvipc operations pid namespace aware
        ipc: Move IPCMNI from include/ipc.h into ipc/util.h
        msg: Move struct msg_queue into ipc/msg.c
        shm: Move struct shmid_kernel into ipc/shm.c
        sem: Move struct sem and struct sem_array into ipc/sem.c
        msg/security: Pass kern_ipc_perm not msg_queue into the msg_queue security hooks
        shm/security: Pass kern_ipc_perm not shmid_kernel into the shm security hooks
        sem/security: Pass kern_ipc_perm not sem_array into the sem security hooks
        pidns: simpler allocation of pid_* caches
      17dec0a9
    • Linus Torvalds's avatar
      Merge branch 'for-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq · d92cd810
      Linus Torvalds authored
      Pull workqueue updates from Tejun Heo:
       "rcu_work addition and a couple trivial changes"
      
      * 'for-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
        workqueue: remove the comment about the old manager_arb mutex
        workqueue: fix the comments of nr_idle
        fs/aio: Use rcu_work instead of explicit rcu and work item
        cgroup: Use rcu_work instead of explicit rcu and work item
        RCU, workqueue: Implement rcu_work
      d92cd810
    • Linus Torvalds's avatar
      Merge branch 'for-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata · a23867f1
      Linus Torvalds authored
      Pull libata updates from Tejun Heo:
       "Nothing too interesting.
      
        The biggest change is refcnting fix for ata_host - the bug is recent
        and can only be triggered on controller hotplug, so very few are
        hitting it.
      
        There also are a number of trivial license / error message changes and
        some hardware specific changes"
      
      * 'for-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata: (23 commits)
        ahci: imx: add the imx8qm ahci sata support
        libata: ensure host is free'd on error exit paths
        ata: ahci-platform: add reset control support
        ahci: imx: fix the build warning
        ata: add Amiga Gayle PATA controller driver
        ahci: imx: add the imx6qp ahci sata support
        ata: change Tegra124 to Tegra
        ata: ahci_tegra: Add AHCI support for Tegra210
        ata: ahci_tegra: disable DIPM
        ata: ahci_tegra: disable devslp for Tegra124
        ata: ahci_tegra: initialize regulators from soc struct
        ata: ahci_tegra: Update initialization sequence
        dt-bindings: Tegra210: add binding documentation
        libata: add refcounting to ata_host
        pata_bk3710: clarify license version and use SPDX header
        pata_falcon: clarify license version and use SPDX header
        pata_it821x: Delete an error message for a failed memory allocation in it821x_firmware_command()
        pata_macio: Delete an error message for a failed memory allocation in two functions
        pata_mpc52xx: Delete an error message for a failed memory allocation in mpc52xx_ata_probe()
        sata_dwc_460ex: Delete an error message for a failed memory allocation in sata_dwc_port_start()
        ...
      a23867f1
    • Linus Torvalds's avatar
      Merge tag 'media/v4.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media · ef1c4a6f
      Linus Torvalds authored
      Pull media updates from Mauro Carvalho Chehab:
      
       - new CEC pin injection code for testing purposes
      
       - DVB frontend cxd2099 promoted from staging
      
       - new platform driver for Sony cxd2880 DVB devices
      
       - new sensor drivers: mt9t112, ov2685, ov5695, ov772x, tda1997x,
         tw9910.c
      
       - removal of unused cx18 and ivtv alsa mixers
      
       - the reneseas-ceu driver doesn't depend on soc_camera anymore and
         moved from staging
      
       - removed the mantis_vp3028 driver, unused since 2009
      
       - s5p-mfc: add support for version 10 of the MSP
      
       - added a decoder for imon protocol
      
       - atomisp: lots of cleanups
      
       - imx074 and mt9t031: don't depend on soc_camera anymore, being
         promoted from staging
      
       - added helper functions to better support DVB I2C binding
      
       - lots of driver improvements and cleanups
      
      * tag 'media/v4.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (438 commits)
        media: v4l2-ioctl: rename a temp var that stores _IOC_SIZE(cmd)
        media: fimc-capture: get rid of two warnings
        media: dvb-usb-v2: fix a missing dependency of I2C_MUX
        media: uvc: to the right check at uvc_ioctl_enum_framesizes()
        media: cec-core: fix a bug at cec_error_inj_write()
        media: tda9840: cleanup a warning
        media: tm6000:  avoid casting just to print pointer address
        media: em28xx-input: improve error handling code
        media: zr364xx: avoid casting just to print pointer address
        media: vivid-radio-rx: add a cast to avoid a warning
        media: saa7134-alsa: don't use casts to print a buffer address
        media: solo6x10: get rid of an address space warning
        media: zoran: don't cast pointers to print them
        media: ir-kbd-i2c: change the if logic to avoid a warning
        media: ir-kbd-i2c: improve error handling code
        media: saa7134-input: improve error handling
        media: s2255drv: fix a casting warning
        media: ivtvfb: Cleanup some warnings
        media: videobuf-dma-sg: Fix a weird cast
        soc_camera: fix a weird cast on printk
        ...
      ef1c4a6f
  2. 03 Apr, 2018 19 commits
    • Linus Torvalds's avatar
      Merge tag 'kconfig-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild · 147a89bc
      Linus Torvalds authored
      Pull Kconfig updates from Masahiro Yamada:
      
       - improve checkpatch for more precise Kconfig code checking
      
       - clarify effective selects by grouping reverse dependencies in help
      
       - do not write out '# CONFIG_FOO is not set' from invisible symbols
      
       - make oldconfig as silent as it should be
      
       - rename 'silentoldconfig' to 'syncconfig'
      
       - add unit-test framework and several test cases
      
       - warn unmet dependency of tristate symbols
      
       - make unmet dependency warnings readable, removing false positives
      
       - improve recursive include detection
      
       - use yylineno to simplify the line number tracking
      
       - misc cleanups
      
      * tag 'kconfig-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (30 commits)
        kconfig: use yylineno option instead of manual lineno increments
        kconfig: detect recursive inclusion earlier
        kconfig: remove duplicated file name and lineno of recursive inclusion
        kconfig: do not include both curses.h and ncurses.h for nconfig
        kconfig: make unmet dependency warnings readable
        kconfig: warn unmet direct dependency of tristate symbols selected by y
        kconfig: tests: test if recursive inclusion is detected
        kconfig: tests: test if recursive dependencies are detected
        kconfig: tests: test randconfig for choice in choice
        kconfig: tests: test defconfig when two choices interact
        kconfig: tests: check visibility of tristate choice values in y choice
        kconfig: tests: check unneeded "is not set" with unmet dependency
        kconfig: tests: test if new symbols in choice are asked
        kconfig: tests: test automatic submenu creation
        kconfig: tests: add basic choice tests
        kconfig: tests: add framework for Kconfig unit testing
        kbuild: add PYTHON2 and PYTHON3 variables
        kconfig: remove redundant streamline_config.pl prerequisite
        kconfig: rename silentoldconfig to syncconfig
        kconfig: invoke oldconfig instead of silentoldconfig from local*config
        ...
      147a89bc
    • Linus Torvalds's avatar
      Merge tag 'kbuild-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild · 3b24b837
      Linus Torvalds authored
      Pull Kbuild updates from Masahiro Yamada:
      
       - add a shell script to get Clang version
      
       - improve portability of build scripts
      
       - drop always-enabled CONFIG_THIN_ARCHIVE and remove unused code
      
       - rename built-in.o which is now thin archive to built-in.a
      
       - process clean/build targets one by one to get along with -j option
      
       - simplify ld-option
      
       - improve building with CONFIG_TRIM_UNUSED_KSYMS
      
       - define KBUILD_MODNAME even for objects shared among multiple modules
      
       - avoid linking multiple instances of same objects from composite
         objects
      
       - move <linux/compiler_types.h> to c_flags to include it only for C
         files
      
       - clean-up various Makefiles
      
      * tag 'kbuild-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (29 commits)
        kbuild: get <linux/compiler_types.h> out of <linux/kconfig.h>
        kbuild: clean up link rule of composite modules
        kbuild: clean up archive rule of built-in.a
        kbuild: remove partial section mismatch detection for built-in.a
        net: liquidio: clean up Makefile for simpler composite object handling
        lib: zstd: clean up Makefile for simpler composite object handling
        kbuild: link $(real-obj-y) instead of $(obj-y) into built-in.a
        kbuild: rename real-objs-y/m to real-obj-y/m
        kbuild: move modname and modname-multi close to modname_flags
        kbuild: simplify modname calculation
        kbuild: fix modname for composite modules
        kbuild: define KBUILD_MODNAME even if multiple modules share objects
        kbuild: remove unnecessary $(subst $(obj)/, , ...) in modname-multi
        kbuild: Use ls(1) instead of stat(1) to obtain file size
        kbuild: link vmlinux only once for CONFIG_TRIM_UNUSED_KSYMS
        kbuild: move include/config/ksym/* to include/ksym/*
        kbuild: move CONFIG_TRIM_UNUSED_KSYMS code unneeded for external module
        kbuild: restore autoksyms.h touch to the top Makefile
        kbuild: move 'scripts' target below
        kbuild: remove wrong 'touch' in adjust_autoksyms.sh
        ...
      3b24b837
    • Linus Torvalds's avatar
      Merge branch 'parisc-4.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux · 0734e00e
      Linus Torvalds authored
      Pull parisc updates from Helge Deller:
       "Lots of small enhancements and fixes in this patchset:
      
         - improved the x86-64 compatibility for PCI cards by returning -1UL
           for timed out MMIO transactions (instead of crashing)
      
         - fixed HPMC handler for PAT machines: size needs to be multiple of 16
      
         - prepare machine_power_off() to be able to turn rp3410 and c8000
           machines off via IMPI
      
         - added code to extract machine info for usage with qemu
      
         - some init sections fixes
      
         - lots of fixes for sparse-, ubsan- and uninitalized variables
           warnings"
      
      * 'parisc-4.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
        parisc: Fix out of array access in match_pci_device()
        parisc: Add code generator for Qemu/SeaBIOS machine info
        parisc/pci: Switch LBA PCI bus from Hard Fail to Soft Fail mode
        parisc: Fix HPMC handler by increasing size to multiple of 16 bytes
        parisc: Directly call machine_power_off() in power button driver
        parisc: machine_power_off() should call pm_power_off()
        parisc/Kconfig: SMP kernels boot on all machines
        parisc: Silence uninitialized variable warning in dbl_to_sgl_fcnvff()
        parisc: Move various functions and strings to init section
        parisc: Convert MAP_TYPE to cover 4 bits on parisc
        parisc: Force to various endian types for sparse
        parisc/gscps2: Fix sparse warnings
        parisc/led: Fix sparse warnings
        parisc/parport_gsc: Use NULL to avoid sparse warning
        parisc/stifb: Use fb_memset() to avoid sparse warning
      0734e00e
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next · 4608f064
      Linus Torvalds authored
      Pull sparc updates from David Miller:
      
       1) Add support for ADI (Application Data Integrity) found in more
          recent sparc64 cpus. Essentially this is keyed based access to
          virtual memory, and if the key encoded in the virual address is
          wrong you get a trap.
      
          The mm changes were reviewed by Andrew Morton and others.
      
          Work by Khalid Aziz.
      
       2) Validate DAX completion index range properly, from Rob Gardner.
      
       3) Add proper Kconfig deps for DAX driver. From Guenter Roeck.
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next:
        sparc64: Make atomic_xchg() an inline function rather than a macro.
        sparc64: Properly range check DAX completion index
        sparc: Make auxiliary vectors for ADI available on 32-bit as well
        sparc64: Oracle DAX driver depends on SPARC64
        sparc64: Update signal delivery to use new helper functions
        sparc64: Add support for ADI (Application Data Integrity)
        mm: Allow arch code to override copy_highpage()
        mm: Clear arch specific VM flags on protection change
        mm: Add address parameter to arch_validate_prot()
        sparc64: Add auxiliary vectors to report platform ADI properties
        sparc64: Add handler for "Memory Corruption Detected" trap
        sparc64: Add HV fault type handlers for ADI related faults
        sparc64: Add support for ADI register fields, ASIs and traps
        mm, swap: Add infrastructure for saving page metadata on swap
        signals, sparc: Add signal codes for ADI violations
      4608f064
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next · 5bb053be
      Linus Torvalds authored
      Pull networking updates from David Miller:
      
       1) Support offloading wireless authentication to userspace via
          NL80211_CMD_EXTERNAL_AUTH, from Srinivas Dasari.
      
       2) A lot of work on network namespace setup/teardown from Kirill Tkhai.
          Setup and cleanup of namespaces now all run asynchronously and thus
          performance is significantly increased.
      
       3) Add rx/tx timestamping support to mv88e6xxx driver, from Brandon
          Streiff.
      
       4) Support zerocopy on RDS sockets, from Sowmini Varadhan.
      
       5) Use denser instruction encoding in x86 eBPF JIT, from Daniel
          Borkmann.
      
       6) Support hw offload of vlan filtering in mvpp2 dreiver, from Maxime
          Chevallier.
      
       7) Support grafting of child qdiscs in mlxsw driver, from Nogah
          Frankel.
      
       8) Add packet forwarding tests to selftests, from Ido Schimmel.
      
       9) Deal with sub-optimal GSO packets better in BBR congestion control,
          from Eric Dumazet.
      
      10) Support 5-tuple hashing in ipv6 multipath routing, from David Ahern.
      
      11) Add path MTU tests to selftests, from Stefano Brivio.
      
      12) Various bits of IPSEC offloading support for mlx5, from Aviad
          Yehezkel, Yossi Kuperman, and Saeed Mahameed.
      
      13) Support RSS spreading on ntuple filters in SFC driver, from Edward
          Cree.
      
      14) Lots of sockmap work from John Fastabend. Applications can use eBPF
          to filter sendmsg and sendpage operations.
      
      15) In-kernel receive TLS support, from Dave Watson.
      
      16) Add XDP support to ixgbevf, this is significant because it should
          allow optimized XDP usage in various cloud environments. From Tony
          Nguyen.
      
      17) Add new Intel E800 series "ice" ethernet driver, from Anirudh
          Venkataramanan et al.
      
      18) IP fragmentation match offload support in nfp driver, from Pieter
          Jansen van Vuuren.
      
      19) Support XDP redirect in i40e driver, from Björn Töpel.
      
      20) Add BPF_RAW_TRACEPOINT program type for accessing the arguments of
          tracepoints in their raw form, from Alexei Starovoitov.
      
      21) Lots of striding RQ improvements to mlx5 driver with many
          performance improvements, from Tariq Toukan.
      
      22) Use rhashtable for inet frag reassembly, from Eric Dumazet.
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1678 commits)
        net: mvneta: improve suspend/resume
        net: mvneta: split rxq/txq init and txq deinit into SW and HW parts
        ipv6: frags: fix /proc/sys/net/ipv6/ip6frag_low_thresh
        net: bgmac: Fix endian access in bgmac_dma_tx_ring_free()
        net: bgmac: Correctly annotate register space
        route: check sysctl_fib_multipath_use_neigh earlier than hash
        fix typo in command value in drivers/net/phy/mdio-bitbang.
        sky2: Increase D3 delay to sky2 stops working after suspend
        net/mlx5e: Set EQE based as default TX interrupt moderation mode
        ibmvnic: Disable irqs before exiting reset from closed state
        net: sched: do not emit messages while holding spinlock
        vlan: also check phy_driver ts_info for vlan's real device
        Bluetooth: Mark expected switch fall-throughs
        Bluetooth: Set HCI_QUIRK_SIMULTANEOUS_DISCOVERY for BTUSB_QCA_ROME
        Bluetooth: btrsi: remove unused including <linux/version.h>
        Bluetooth: hci_bcm: Remove DMI quirk for the MINIX Z83-4
        sh_eth: kill useless check in __sh_eth_get_regs()
        sh_eth: add sh_eth_cpu_data::no_xdfar flag
        ipv6: factorize sk_wmem_alloc updates done by __ip6_append_data()
        ipv4: factorize sk_wmem_alloc updates done by __ip_append_data()
        ...
      5bb053be
    • Linus Torvalds's avatar
      Merge tag 'docs-4.17' of git://git.lwn.net/linux · bb2407a7
      Linus Torvalds authored
      Pull documentation updates from Jonathan Corbet:
       "There's been a fair amount of activity in Documentation/ this time
        around:
      
         - Lots of work aligning Documentation/ABI with reality, done by
           Aishwarya Pant.
      
         - The trace documentation has been converted to RST by Changbin Du
      
         - I thrashed up kernel-doc to deal with a parsing issue and to try to
           make the code more readable. It's still a 20+-year-old Perl hack,
           though.
      
         - Lots of other updates, typo fixes, and more"
      
      * tag 'docs-4.17' of git://git.lwn.net/linux: (82 commits)
        Documentation/process: update FUSE project website
        docs: kernel-doc: fix parsing of arrays
        dmaengine: Fix spelling for parenthesis in dmatest documentation
        dmaengine: Make dmatest.rst indeed reST compatible
        dmaengine: Add note to dmatest documentation about supported channels
        Documentation: magic-numbers: Fix typo
        Documentation: admin-guide: add kvmconfig, xenconfig and tinyconfig commands
        Input: alps - Update documentation for trackstick v3 format
        Documentation: Mention why %p prints ptrval
        COPYING: use the new text with points to the license files
        COPYING: create a new file with points to the Kernel license files
        Input: trackpoint: document sysfs interface
        xfs: Change URL for the project in xfs.txt
        char/bsr: add sysfs interface documentation
        acpi: nfit: document sysfs interface
        block: rbd: update sysfs interface
        Documentation/sparse: fix typo
        Documentation/CodingStyle: Add an example for braces
        docs/vm: update 00-INDEX
        kernel-doc: Remove __sched markings
        ...
      bb2407a7
    • Linus Torvalds's avatar
      Merge tag 'leds_for_4.17-rc1' of... · e40dc662
      Linus Torvalds authored
      Merge tag 'leds_for_4.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds
      
      Pull LED updates from Jacek Anaszewski:
       "New LED class driver:
         - add driver for Mellanox regmap LEDs
      
        Improvement to ledtrig-disk:
         - extend disk trigger for reads and writes
      
        Improvements and fixes to existing LED class drivers:
         - add more product/board names for PC Engines APU2
         - fix wrong dmi_match on PC Engines APU LEDs
         - clarify chips supported by LM355x driver
         - fix Kconfig text for MLXCPLD, SYSCON, MC13783, NETXBIG
         - allow leds-mlxcpld compilation for 32 bit arch"
      
      * tag 'leds_for_4.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds:
        leds: Fix wrong dmi_match on PC Engines APU LEDs
        leds: Extends disk trigger for reads and writes
        leds: Add more product/board names for PC Engines APU2
        leds: add driver for support Mellanox regmap LEDs for BMC and x86 platform
        leds: fix Kconfig text for MLXCPLD, SYSCON, MC13783, NETXBIG
        leds: Clarify supported chips by LM355x driver
        leds: leds-mlxcpld: Allow compilation for 32 bit arch
      e40dc662
    • Linus Torvalds's avatar
      Merge tag 'for-linus-4.17' of git://github.com/cminyard/linux-ipmi · cc5ada7c
      Linus Torvalds authored
      Pull IPMI updates from Corey Minyard:
       "Mostly small changes, as usual.
      
        This does add an IPMI BMC server-side driver, to allow a Linux system
        to act as an IPMI controller. That's the biggest change, but it is
        just a new driver that is fairly narrow in use.
      
        The other largish change is removing ACPI SPMI probe support, which
        should have never really been there in the beginning"
      
      * tag 'for-linus-4.17' of git://github.com/cminyard/linux-ipmi:
        ipmi/parisc: Add IPMI chassis poweroff for certain HP PA-RISC and IA-64 servers
        ipmi_ssif: Fix kernel panic at msg_done_handler
        ipmi:pci: Blacklist a Realtek "IPMI" device
        ipmi: Remove ACPI SPMI probing from the system interface driver
        ipmi: Remove ACPI SPMI probing from the SSIF (I2C) driver
        ipmi: missing error code in try_smi_init()
        ipmi: use ARRAY_SIZE for poweroff_functions array sizing calculation
        ipmi: Consolidate cleanup code
        ipmi: Remove some unnecessary initializations
        ipmi: Fix some error cleanup issues
        ipmi: Add or fix SPDX-License-Identifier in all files
        ipmi: Re-use existing macros for built-in properties
        ipmi:pci: Make the PCI defines consistent with normal Linux ones
        ipmi: kcs_bmc: coding-style fixes and use new poll type
        char/ipmi: add documentation for sysfs interface
        ipmi: kcs_bmc: mark expected switch fall-through in kcs_bmc_handle_data
        ipmi: add an Aspeed KCS IPMI BMC driver
        ipmi: add a KCS IPMI BMC driver
      cc5ada7c
    • Linus Torvalds's avatar
      Merge tag 'pinctrl-v4.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl · 77624cd2
      Linus Torvalds authored
      Pull pin control bulk updates from Linus Walleij:
       "New drivers:
      
         - Qualcomm SDM845: this is their new flagship SoC platform which
           seems to be targeted at premium mobile handsets.
      
         - Renesas R-Car M3-N SoC.
      
         - Renesas R8A77980 SoC.
      
         - NXP (ex Freescale) i.MX 6SLL SoC.
      
         - Mediatek MT2712 SoC.
      
         - Allwinner H6 SoC.
      
        Improvements:
      
         - Uniphier adds a few new functions and pins.
      
         - Renesas refactorings and additional pin definitions.
      
         - Improved pin groups for Axis Artpec6.
      
        Cleanup:
      
         - Drop the TZ1090 drivers. This platform is no longer maintained and
           is being deleted.
      
         - Drop ST-Ericsson U8540/U9540 support as this was never
           productified.
      
         - Overall minor fixes and janitorial"
      
      * tag 'pinctrl-v4.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (82 commits)
        pinctrl: uniphier: add UART hardware flow control pin-mux settings
        pinctrl: sunxi: add support for the Allwinner H6 main pin controller
        pinctrl: sunxi: change irq_bank_base to irq_bank_map
        pinctrl: sunxi: introduce IRQ bank conversion function
        pinctrl: sunxi: refactor irq related register function to have desc
        pinctrl: msm8998: Remove owner assignment from platform_driver
        pinctrl: uniphier: divide I2S and S/PDIF audio out pin-mux group
        pinctrl: uniphier: add PXs2 Audio in/out pin-mux settings
        pinctrl/amd: poll InterruptEnable bits in enable_irq
        pinctrl: ocelot: fix gpio direction
        pinctrl: mtk: fix check warnings.
        pintcrl: mtk: support bias-disable of generic and special pins simultaneously
        pinctrl: add mt2712 pinctrl driver
        pinctrl: pinctrl-single: Fix pcs_request_gpio() when bits_per_mux != 0
        pinctrl: imx: Add pinctrl driver support for imx6sll
        dt-bindings: imx: update pinctrl doc for imx6sll
        pinctrl: intel: Implement intel_gpio_get_direction callback
        pinctrl: stm32: add 'depends on HAS_IOMEM' to fix unmet dependency
        pinctrl: mediatek: mtk-common: use true and false for boolean values
        pinctrl: sunxi: always look for apb block
        ...
      77624cd2
    • Linus Torvalds's avatar
      Merge tag 'mmc-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc · dc73d6a8
      Linus Torvalds authored
      Pull MMC updates from Ulf Hansson:
       "MMC core:
         - Export host capabilities through debugfs
         - Export card RCA register via sysfs
         - Improve card initializing sequence while enabling 4-bit bus
         - Export a function to enable/disable wakeup for card detect IRQ
      
        MMC host:
         - dw_mmc: Add support for new hi3798cv200 variant
         - dw_mmc: Remove support for some deprecated DT properties
         - mediatek: Add support for new variant used on MT7622 SoC
         - sdhci: Improve wakeup support for SDIO IRQs
         - sdhci: Improve wakeup support for card detect IRQs
         - sdhci-omap: Add tuning support
         - sdhci_omap: Add UHS-I mode support
         - sunxi: Prepare for runtime PM support via a few re-factorings
         - tmio: deprecate "toshiba,mmc-wrprotect-disable" DT property
         - tmio/renesas_sdhi: Consolidate code supporting write protect
         - tmio: Improve DMA vs PIO handling
         - tmio: Add support for IP-builtin card detection logic"
      
      * tag 'mmc-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc: (55 commits)
        mmc: renesas_sdhi: replace EXT_ACC with HOST_MODE
        mmc: update sdio_claim_irq documentation
        mmc: Export host capabilities to debugfs.
        mmc: core: Disable HPI for certain Micron (Numonyx) eMMC cards
        mmc: block: fix updating ext_csd caches on ioctl call
        mmc: sunxi: Set our device drvdata earlier
        mmc: sunxi: Move the reset deassertion before enabling the clocks
        mmc: sunxi: Move resources management to separate functions
        mmc: dw_mmc: add support for hi3798cv200 specific extensions of dw-mshc
        dt-bindings: mmc: add bindings for hi3798cv200-dw-mshc
        mmc: core: Export card RCA register via sysfs
        mmc: renesas_sdhi: fix WP detection
        mmc: core: Use memdup_user() rather than duplicating its implementation
        mmc: dw_mmc-rockchip: correct property names in debug
        mmc: sd: Remove redundant err assignment from mmc_read_switch
        mmc: sdio: Check the return value of sdio_enable_4bit_bus
        mmc: core: Don't try UHS-I mode if 4-bit mode isn't supported
        arm64: dts: hi3660: remove 'num-slots' property for dwmmc
        ARM: dts: lpc18xx: remove 'num-slots' property for dwmmc
        arm64: dts: stratix10: remove 'num-slots' property for dwmmc
        ...
      dc73d6a8
    • Linus Torvalds's avatar
      Merge tag 'hsi-for-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-hsi · dabe5184
      Linus Torvalds authored
      Pull HSI updates from Sebastian Reichel:
      
       - spelling/typo fixes
      
       - remove extra error printing for -ENOMEM
      
      * tag 'hsi-for-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-hsi:
        HSI: hsi_char: Delete an error message for a failed memory allocation in hsc_probe()
        HSI: ssi_protocol: fix spelling mistake: "trigerred" -> "triggered"
        HSI: ssi_protocol: Delete an error message for a failed memory allocation in ssi_protocol_probe()
        HSI: ssi_protocol: Fix a typo in two comment lines
      dabe5184
    • Linus Torvalds's avatar
      Merge tag 'for-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply · 3ac684b8
      Linus Torvalds authored
      Pull power supply and reset updates from Sebastian Reichel:
      
       - Microsemi Ocelot reset support
      
       - Spreadtrum SC27xx reset support
      
       - generic gpio charger: lot's of cleanups
      
       - axp20x fuel gauge: add AXP813 support
      
       - misc fixes, including one devicetree change for the Nokia N900, that
         has been Acked-by Tony Lindgren
      
      * tag 'for-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply: (27 commits)
        power: reset: at91-reset: Switch from the pr_*() to the dev_*() logging functions
        power: reset: at91-poweroff: Remove redundant dev_err call in at91_poweroff_probe()
        power: reset: at91-poweroff: Switch from the pr_*() to the dev_*() logging functions
        power: reset: make function sc27xx_poweroff_shutdown static
        power: supply: da9150-fg: remove VLA usage
        ARM: dts: omap3-n900: Add link between battery and charger
        power: supply: bq2415x: add DT referencing support
        power: supply: bq27xxx: support missing supplier device
        max17042: propagate of_node to power supply device
        power: supply: axp288_fuel_gauge: Fix full status reporting
        power: supply: axp288_fuel_gauge: Do not register FG on ECS EF20EA
        power: reset: gpio-poweroff: Support for timeout from device property
        dt-bindings: power: reset: gpio-poweroff: Add 'timeout-ms' property
        power: reset: Add Spreadtrum SC27xx PMIC power off support
        power: supply: axp20x_battery: add support for AXP813
        dt-bindings: power: supply: axp20x: add AXP813 battery DT binding
        power: supply: axp20x_battery: use data struct for variant specific code
        power: supply: gpio-charger: Remove pdata from gpio_charger
        power: supply: gpio-charger: Use GPIOF_ACTIVE_LOW for legacy setup
        power: supply: gpio-charger: Remove redundant dev_err call in probe function
        ...
      3ac684b8
    • Linus Torvalds's avatar
      Merge tag 'spi-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi · 75dcc7ef
      Linus Torvalds authored
      Pull SPI updates from Mark Brown:
       "A quiet release for SPI, some fixes and small updates for individual
        drivers with one bigger change from Linus Walleij which coverts the
        bitbanging SPI driver to use the GPIO descriptor API from Linus
        Walleij.
      
        Since GPIO descriptors were used by platform data this means there's a
        few changes in arch/ making relevant updates for a few platforms and
        one misc driver that are affected"
      
      * tag 'spi-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (24 commits)
        MAINTAINERS: update Andi's e-mail
        spi: spi-atmel: Use correct enum for DMA transfer direction
        spi: sh-msiof: Document R-Car M3-N support
        spi: sh-msiof: Use correct enum for DMA transfer direction
        spi: sprd: Add the support of restarting the system
        spi: sprd: Simplify the transfer function
        spi: Fix unregistration of controller with fixed SPI bus number
        spi: rspi: use correct enum for DMA transfer direction
        spi: jcore: disable ref_clk after getting its rate
        spi: bcm-qspi: fIX some error handling paths
        spi: pxa2xx: Disable runtime PM if controller registration fails
        spi: tegra20-slink: use true and false for boolean values
        spi: Fix scatterlist elements size in spi_map_buf
        spi: atmel: init FIFOs before spi enable
        spi: orion: Prepare space for per-child options
        spi: orion: Make the error message greppable
        spi: orion: Rework GPIO CS handling
        spi: bcm2835aux: Avoid 64-bit arithmetic in xfer len calc
        spi: spi-gpio: Augment device tree bindings
        spi: spi-gpio: Rewrite to use GPIO descriptors
        ...
      75dcc7ef
    • Linus Torvalds's avatar
      Merge tag 'regulator-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator · b51c4354
      Linus Torvalds authored
      Pull regulator updates from Mark Brown:
       "A very small set of updates for the regulator API this time around,
        there's a few bug fixes and also:
      
         - Conversion of the regulator API to use GPIO descriptors rather than
           numbers from Linus Walleij.
      
         - New drivers for Marvell 88PG86x and Qualcomm PM8998 and PMI8998"
      
      * tag 'regulator-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
        regulator: qcom: smd: Add pm8998 and pmi8998 regulators
        regulator: core: Add missing blank line between functions
        regulator: qcom_smd: Drop regulator/{machine,of_regulator} includes
        regulator: giving regulator controlling gpios a non-empty label when used through the devicetree.
        regulator: gpio: Fix some error handling paths in 'gpio_regulator_probe()'
        regulator: 88pg86x: new i2c dual regulator chip
        regulator: 88pg86x: add DT bindings document
        regulator: da9211: Pass descriptors instead of GPIO numbers
        regulator: da9055: Pass descriptor instead of GPIO number
        regulator: core: Support passing an initialized GPIO enable descriptor
        regulator: dt: regulator-name is required property
        regulator: of: Add a missing 'of_node_put()' in an error handling path of 'of_regulator_match()'
      b51c4354
    • Linus Torvalds's avatar
      Merge tag 'regmap-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap · ffd776bf
      Linus Torvalds authored
      Pull regmap updates from Mark Brown:
       "This is a fairly large set of updates for regmap, mainly bugfixes.
      
        The biggest bit of this is some fixes for the bulk operations code
        which had issues in some use cases, Charles Keepax has sorted them
        out. We also gained the ability to use debugfs with syscon regmaps and
        to specify the clock to be used with MMIO regmaps"
      
      * tag 'regmap-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap: (21 commits)
        regmap: debugfs: Improve warning message on debugfs_create_dir() failure
        regmap: debugfs: Free map->debugfs_name when debugfs_create_dir() failed
        regmap: debugfs: Don't leak dummy names
        regmap: debugfs: Disambiguate dummy debugfs file name
        regmap: mmio: Add function to attach a clock
        regmap: Merge redundant handling in regmap_bulk_write
        regmap: Tidy up regmap_raw_write chunking code
        regmap: Move the handling for max_raw_write into regmap_raw_write
        regmap: Remove unnecessary printk for failed allocation
        regmap: Format data for raw write in regmap_bulk_write
        regmap: use debugfs even when no device
        regmap: Allow missing device in regmap_name_read_file()
        regmap: Use _regmap_read in regmap_bulk_read
        regmap: Tidy up regmap_raw_read chunking code
        regmap: Move the handling for max_raw_read into regmap_raw_read
        regmap: Use helper function for register offset
        regmap: Don't use format_val in regmap_bulk_read
        regmap: Correct comparison in regmap_cached
        regmap: Correct offset handling in regmap_volatile_range
        regmap-i2c: Off by one in regmap_i2c_smbus_i2c_read/write()
        ...
      ffd776bf
    • Linus Torvalds's avatar
      Merge tag 'pm-4.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm · f2d28566
      Linus Torvalds authored
      Pull power management updates from Rafael Wysocki:
       "These update the cpuidle poll state definition to reduce excessive
        energy usage related to it, add new CPU ID to the RAPL power capping
        driver, update the ACPI system suspend code to handle some special
        cases better, extend the PM core's device links code slightly, add new
        sysfs attribute for better suspend-to-idle diagnostics and easier
        hibernation handling, update power management tools and clean up
        cpufreq quite a bit.
      
        Specifics:
      
         - Modify the cpuidle poll state implementation to prevent CPUs from
           staying in the loop in there for excessive times (Rafael Wysocki).
      
         - Add Intel Cannon Lake chips support to the RAPL power capping
           driver (Joe Konno).
      
         - Add reference counting to the device links handling code in the PM
           core (Lukas Wunner).
      
         - Avoid reconfiguring GPEs on suspend-to-idle in the ACPI system
           suspend code (Rafael Wysocki).
      
         - Allow devices to be put into deeper low-power states via ACPI if
           both _SxD and _SxW are missing (Daniel Drake).
      
         - Reorganize the core ACPI suspend-to-idle wakeup code to avoid a
           keyboard wakeup issue on Asus UX331UA (Chris Chiu).
      
         - Prevent the PCMCIA library code from aborting suspend-to-idle due
           to noirq suspend failures resulting from incorrect assumptions
           (Rafael Wysocki).
      
         - Add coupled cpuidle supprt to the Exynos3250 platform (Marek
           Szyprowski).
      
         - Add new sysfs file to make it easier to specify the image storage
           location during hibernation (Mario Limonciello).
      
         - Add sysfs files for collecting suspend-to-idle usage and time
           statistics for CPU idle states (Rafael Wysocki).
      
         - Update the pm-graph utilities (Todd Brandt).
      
         - Reduce the kernel log noise related to reporting Low-power Idle
           constraings by the ACPI system suspend code (Rafael Wysocki).
      
         - Make it easier to distinguish dedicated wakeup IRQs in the
           /proc/interrupts output (Tony Lindgren).
      
         - Add the frequency table validation in cpufreq to the core and drop
           it from a number of cpufreq drivers (Viresh Kumar).
      
         - Drop "cooling-{min|max}-level" for CPU nodes from a couple of DT
           bindings (Viresh Kumar).
      
         - Clean up the CPU online error code path in the cpufreq core (Viresh
           Kumar).
      
         - Fix assorted issues in the SCPI, CPPC, mediatek and tegra186
           cpufreq drivers (Arnd Bergmann, Chunyu Hu, George Cherian, Viresh
           Kumar).
      
         - Drop memory allocation error messages from a few places in cpufreq
           and cpuildle drivers (Markus Elfring)"
      
      * tag 'pm-4.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (56 commits)
        ACPI / PM: Fix keyboard wakeup from suspend-to-idle on ASUS UX331UA
        cpufreq: CPPC: Use transition_delay_us depending transition_latency
        PM / hibernate: Change message when writing to /sys/power/resume
        PM / hibernate: Make passing hibernate offsets more friendly
        cpuidle: poll_state: Avoid invoking local_clock() too often
        PM: cpuidle/suspend: Add s2idle usage and time state attributes
        cpuidle: Enable coupled cpuidle support on Exynos3250 platform
        cpuidle: poll_state: Add time limit to poll_idle()
        cpufreq: tegra186: Don't validate the frequency table twice
        cpufreq: speedstep: Don't validate the frequency table twice
        cpufreq: sparc: Don't validate the frequency table twice
        cpufreq: sh: Don't validate the frequency table twice
        cpufreq: sfi: Don't validate the frequency table twice
        cpufreq: scpi: Don't validate the frequency table twice
        cpufreq: sc520: Don't validate the frequency table twice
        cpufreq: s3c24xx: Don't validate the frequency table twice
        cpufreq: qoirq: Don't validate the frequency table twice
        cpufreq: pxa: Don't validate the frequency table twice
        cpufreq: ppc_cbe: Don't validate the frequency table twice
        cpufreq: powernow: Don't validate the frequency table twice
        ...
      f2d28566
    • Linus Torvalds's avatar
      Merge tag 'acpi-4.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm · be553754
      Linus Torvalds authored
      Pull ACPI updates from Rafael Wysocki:
       "These update the ACPICA code in the kernel to follow upstream revision
        20180313 which includes fixes related to the so-called module-level
        AML (mostly "if" type of statements outside of any methods) that
        should improve the handling of systems that load alternative SSDTs
        depending on the current configuration, for example, and event
        handling fixes related to disabling and enabling GPEs on system
        startup and on suspend/resume.
      
        Moreover, the ACPICA license boilerplate is replaced with SPDX license
        IDs which alone reduces the number of lines of ACPICA code in the
        kernel quite a bit.
      
        Also added is a new driver for the generic ACPI Time and Alarm Device
        (TAD). At the moment it only handles the most basic capabilities of
        the TAD, however.
      
        In addition to that the ACPI battery driver is improved to handle
        battery thresholds on ThinkPads, among other things, some bugs are
        fixed, a new backlight quirk is added and some documentation is
        updated.
      
        Specifics:
      
         - Update the in-kernel ACPICA code to upstream revision 20180313
           including:
            * Module-level AML code handling fixes and simplifications (Bob
              Moore, Erik Schmauss).
            * Fixes and cleanups related to messaging (Bob Moore).
            * Events handling fixes related to disabling and enabling GPEs
              (Erik Schmauss).
            * Introduction of SPDX license identifiers and removal of license
              boilerplate in multiple files (Erik Schmauss).
            * Assorted fixes and cleanups (Bob Moore, Erik Schmauss, Hans de
              Goede, Seunghun Han).
      
         - Add new basic driver for the ACPI Time and Alarm Device (Rafael
           Wysocki).
      
         - Modify the ACPI battery driver to support battery thresholds on
           Lenovo ThinkPads (Ognjen Galic, Colin Ian King).
      
         - Avoid reporting battery capacity over 100 in the ACPI battery
           driver in some cases (Laszlo Toth).
      
         - Make the kernel recognize an OEM _OSI string from Dell to avoid
           power management issues with NVidia GPUs in Dell platforms (Alex
           Hung).
      
         - Make the PCI IRQ management code handle missing _PRS cleanly (Alex
           Hung).
      
         - Fix uevent notifications related to device hotplut (Lee, Chun-Yi).
      
         - Prevent the ACPI PAD driver from leaking memory (Lenny Szubowicz).
      
         - Update the ACPI CPPC library code to include subspace IDs in the
           kernel messages logged by it (George Cherian).
      
         - Add backlight quirk for Samsung 670Z5E (Hans de Goede).
      
         - Add the NFIT and HMAT tables to the list of ACPI tables that can be
           overridden via initrd (Dan Williams).
      
         - Fix and clean up some ACPI documentation and Kconfig help language
           (Aishwarya Pant, Randy Dunlap).
      
         - Replace license boilerplate with an SPDX license ID in the ACPI
           PMIC operation region handling code (Rajmohan Mani)"
      
      * tag 'acpi-4.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (39 commits)
        ACPI: acpi_pad: Fix memory leak in power saving threads
        ACPI / video: Add quirk to force acpi-video backlight on Samsung 670Z5E
        ACPI: Add Time and Alarm Device (TAD) driver
        ACPI / scan: Send change uevent with offine environmental data
        ACPI / Kconfig: Update ACPI_PROCFS_POWER help text
        ACPI / OSI: Add OEM _OSI strings to disable NVidia RTD3
        ACPICA: Update version to 20180313
        ACPICA: Cleanup/simplify module-level code support
        ACPICA: Events: add a return on failure from acpi_hw_register_read
        ACPICA: adding SPDX headers
        ACPICA: Rename a global for clarity, no functional change
        ACPICA: macros: fix ACPI_ERROR_NAMESPACE macro
        ACPICA: Change a compile-time option to a runtime option
        ACPICA: Remove calling of _STA from acpi_get_object_info()
        ACPICA: AML Debug Object: Don't ignore output of zero-length strings
        ACPICA: Fix memory leak on unusual memory leak
        ACPICA: Events: Dispatch GPEs after enabling for the first time
        ACPICA: Events: Add parallel GPE handling support to fix potential redundant _Exx evaluations
        ACPICA: Events: Stop unconditionally clearing ACPI IRQs during suspend/resume
        ACPICA: acpi: acpica: fix acpi operand cache leak in nseval.c
        ...
      be553754
    • David S. Miller's avatar
      sparc64: Make atomic_xchg() an inline function rather than a macro. · d13864b6
      David S. Miller authored
      This avoids a lot of -Wunused warnings such as:
      
      ====================
      kernel/debug/debug_core.c: In function ‘kgdb_cpu_enter’:
      ./arch/sparc/include/asm/cmpxchg_64.h:55:22: warning: value computed is not used [-Wunused-value]
       #define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
      
      ./arch/sparc/include/asm/atomic_64.h:86:30: note: in expansion of macro ‘xchg’
       #define atomic_xchg(v, new) (xchg(&((v)->counter), new))
                                    ^~~~
      kernel/debug/debug_core.c:508:4: note: in expansion of macro ‘atomic_xchg’
          atomic_xchg(&kgdb_active, cpu);
          ^~~~~~~~~~~
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      d13864b6
    • Linus Torvalds's avatar
      Merge branch 'syscalls-next' of git://git.kernel.org/pub/scm/linux/kernel/git/brodo/linux · 642e7fd2
      Linus Torvalds authored
      Pull removal of in-kernel calls to syscalls from Dominik Brodowski:
       "System calls are interaction points between userspace and the kernel.
        Therefore, system call functions such as sys_xyzzy() or
        compat_sys_xyzzy() should only be called from userspace via the
        syscall table, but not from elsewhere in the kernel.
      
        At least on 64-bit x86, it will likely be a hard requirement from
        v4.17 onwards to not call system call functions in the kernel: It is
        better to use use a different calling convention for system calls
        there, where struct pt_regs is decoded on-the-fly in a syscall wrapper
        which then hands processing over to the actual syscall function. This
        means that only those parameters which are actually needed for a
        specific syscall are passed on during syscall entry, instead of
        filling in six CPU registers with random user space content all the
        time (which may cause serious trouble down the call chain). Those
        x86-specific patches will be pushed through the x86 tree in the near
        future.
      
        Moreover, rules on how data may be accessed may differ between kernel
        data and user data. This is another reason why calling sys_xyzzy() is
        generally a bad idea, and -- at most -- acceptable in arch-specific
        code.
      
        This patchset removes all in-kernel calls to syscall functions in the
        kernel with the exception of arch/. On top of this, it cleans up the
        three places where many syscalls are referenced or prototyped, namely
        kernel/sys_ni.c, include/linux/syscalls.h and include/linux/compat.h"
      
      * 'syscalls-next' of git://git.kernel.org/pub/scm/linux/kernel/git/brodo/linux: (109 commits)
        bpf: whitelist all syscalls for error injection
        kernel/sys_ni: remove {sys_,sys_compat} from cond_syscall definitions
        kernel/sys_ni: sort cond_syscall() entries
        syscalls/x86: auto-create compat_sys_*() prototypes
        syscalls: sort syscall prototypes in include/linux/compat.h
        net: remove compat_sys_*() prototypes from net/compat.h
        syscalls: sort syscall prototypes in include/linux/syscalls.h
        kexec: move sys_kexec_load() prototype to syscalls.h
        x86/sigreturn: use SYSCALL_DEFINE0
        x86: fix sys_sigreturn() return type to be long, not unsigned long
        x86/ioport: add ksys_ioperm() helper; remove in-kernel calls to sys_ioperm()
        mm: add ksys_readahead() helper; remove in-kernel calls to sys_readahead()
        mm: add ksys_mmap_pgoff() helper; remove in-kernel calls to sys_mmap_pgoff()
        mm: add ksys_fadvise64_64() helper; remove in-kernel call to sys_fadvise64_64()
        fs: add ksys_fallocate() wrapper; remove in-kernel calls to sys_fallocate()
        fs: add ksys_p{read,write}64() helpers; remove in-kernel calls to syscalls
        fs: add ksys_truncate() wrapper; remove in-kernel calls to sys_truncate()
        fs: add ksys_sync_file_range helper(); remove in-kernel calls to syscall
        kernel: add ksys_setsid() helper; remove in-kernel call to sys_setsid()
        kernel: add ksys_unshare() helper; remove in-kernel calls to sys_unshare()
        ...
      642e7fd2