See commit 1527bc8b.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>

Until now, the tile architecture ABI for syscall return has just been
that r0 holds the return value, and an error is only signalled like it is
for kernel code, with a negative small number.

However, this means that in multiple places in userspace we end up writing
the same three-cycle idiom that tests for a small negative number for
error.  It seems cleaner to instead move that code into the kernel, and
set r1 to hold zero on success or errno on failure; previously, r1 was
just zeroed on return from the kernel (to avoid leaking kernel state).
This way a single conditional branch after the syscall is sufficient
to test for the failure case.  The number of cycles taken is the same,
but the error-checking code is in just one place, so total code size is
smaller, and random userspace syscall code is easier to understand.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>

* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6:
  [S390] partitions: fix build error in ibm partition detection code
  [S390] appldata: fix dev_get_stats 64 bit conversion
  [S390] wire up prlimit64 and fanotify* syscalls
  [S390] zcrypt: fix Kconfig dependencies
  [S390] sys_personality: follow u_long to unsigned int conversion
  [S390] dasd: fix format string types

* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6:
  V4L/DVB: v4l2-ctrls.c: needs to include slab.h
  V4L/DVB: fix Kconfig to depends on VIDEO_IR
  V4L/DVB: Fix IR_CORE dependencies

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2:
  O2net: Disallow o2net accept connection request from itself.
  ocfs2/dlm: remove potential deadlock -V3
  ocfs2/dlm: avoid incorrect bit set in refmap on recovery master
  Fix the nested PR lock calling issue in ACL
  ocfs2: Count more refcount records in file system fragmentation.
  ocfs2 fix o2dlm dlm run purgelist (rev 3)
  ocfs2/dlm: fix a dead lock
  ocfs2: do not overwrite error codes in ocfs2_init_acl

Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (30 commits)
  perf: Add back list_head data types
  perf ui hist browser: Fixup key bindings
  perf ui browser: Add ui_browser__show counterpart: __hide
  perf annotate: Cycle thru sorted lines with samples
  perf ui: Make SPACE work as PGDN in all browsers
  perf annotate: Sort by hottest lines in the TUI
  perf ui: Complete the breakdown of util/newt.c
  perf ui: Move hists browser to util/ui/browsers/
  perf symbols: Ignore mapping symbols on ARM
  perf ui: Move map browser to util/ui/browsers/
  perf ui: Move annotate browser to util/ui/browsers/
  perf ui: Move ui_progress routines to separate file in util/ui/
  perf ui: Move ui_helpline routines to separate file in util/ui/
  perf ui: Shorten ui_browser member names
  perf, x86: P4 PMU -- update nmi irq statistics and unmask lvt entry properly
  perf ui: Start breaking down newt.c into multiple files
  perf tui: Introduce list_head based generic ui_browser refresh routine
  perf probe: Fix memory leaks in add_perf_probe_events
  perf probe: Fix to copy the type for raw parameters
  perf report: Speed up exit path
  ...

* 'x86-uv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, UV: Initialize BAU MMRs only on hubs with cpus
  x86, UV: Modularize BAU send and wait
  x86, UV: BAU broadcast to the local hub
  x86, UV: Correct BAU regular message type
  x86, UV: Remove BAU check for stay-busy
  x86, UV: Correct BAU discovery of hubs and sockets
  x86, UV: Correct BAU software acknowledge
  x86, UV: BAU structure rearranging
  x86, UV: Shorten access to BAU statistics structure
  x86, UV: Disable BAU on network congestion
  x86, UV: BAU tunables into a debugfs file
  x86, UV: Calculate BAU destination timeout

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (30 commits)
  ctcm: rename READ/WRITE defines to avoid redefinitions
  claw: rename READ/WRITE defines to avoid redefinitions
  phylib: available for any speed ethernet
  can: add limit for nframes and clean up signed/unsigned variables
  pkt_sched: Check .walk and .leaf class handlers
  pkt_sched: Fix sch_sfq vs tc_modify_qdisc oops
  caif-spi: Bugfix SPI_DATA_POS settings were inverted.
  caif: Bugfix - Increase default headroom size for control channel.
  net: make netpoll_rx return bool for !CONFIG_NETPOLL
  Bluetooth: Use 3-DH5 payload size for default ERTM max PDU size
  Bluetooth: Fix incorrect setting of remote_tx_win for L2CAP ERTM
  Bluetooth: Change default L2CAP ERTM retransmit timeout
  Bluetooth: Fix endianness issue with L2CAP MPS configuration
  net: Use NET_XMIT_SUCCESS where possible.
  isdn: mISDN: call pci_disable_device() if pci_probe() failed
  isdn: avm: call pci_disable_device() if pci_probe() failed
  isdn: avm: call pci_disable_device() if pci_probe() failed
  usbnet: rx_submit() should return an error code.
  pkt_sched: Add some basic qdisc class ops verification. Was: [PATCH] sfq: add dummy bind/unbind handles
  pkt_sched: sch_sfq: Add dummy unbind_tcf and put handles. Was: [PATCH] sfq: add dummy bind/unbind handles
  ...

* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6:
  [NFS] Set CONFIG_KEYS when CONFIG_NFS_USE_KERNEL_DNS is set
  AFS: Implement an autocell mount capability [ver #2]
  DNS: If the DNS server returns an error, allow that to be cached [ver #2]
  NFS: Use kernel DNS resolver [ver #2]
  cifs: update README to include details about 'fsc' option

* 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, asm: Use a lower case name for the end macro in atomic64_386_32.S
  x86, asm: Refactor atomic64_386_32.S to support old binutils and be cleaner
  x86: Document __phys_reloc_hide() usage in __pa_symbol()
  x86, apic: Map the local apic when parsing the MP table.

It's wrong for several reasons, but the most direct one is that the
fault may be for the stack accesses to set up a previous SIGBUS.  When
we have a kernel exception, the kernel exception handler does all the
fixups, not some user-level signal handler.

Even apart from the nested SIGBUS issue, it's also wrong to give out
kernel fault addresses in the signal handler info block, or to send a
SIGBUS when a system call already returns EFAULT.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

.. which didn't show up in my tests because it's a no-op on x86-64 and
most other architectures.  But we enter the function with the last-level
page table mapped, and should unmap it at exit.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

This change rolls up random cleanups not representing any actual bugs.

- Remove a stale CONFIG_ value from the default tile_defconfig
- Remove unused tns_atomic_xxx() family of methods from <asm/atomic.h>
- Optimize get_order() using Tile's "clz" instruction
- Fix a bad hypervisor upcall name (not currently used in Linux anyway)
- Use __copy_in_user_inatomic() name for consistency, and export it
- Export some additional hypervisor driver I/O upcalls and some homecache calls
- Remove the obfuscating MEMCPY_TEST_WH64 support code
- Other stray comment cleanups, #if 0 removal, etc.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>

This functionality was stubbed out until recently.  Now we support our
normal backtracing API on TILE-Gx as well as on TILE64/TILEPro.
This change includes a tweak to the instruction encoding caused by
adding addxli for compat mode.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>

First, the siginfo preamble wasn't quite right; we need to indicate
that we are padding up to 4 ints of preamble for 64-bit code, and
then for compat mode we need to pad differently, using only 3 ints.

Second, the C ABI requires a save area of two registers, not two
pointers, since in compat mode we have 64-bit registers all of which
we need to save, even though we only have 32-bit VAs.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>

We were using the same 5-sec minsec for the clocksource and sched_clock
that we were using for the clock_event_device.  For the clock_event_device
that's exactly right since it has a short maximum countdown time.
But for sched_clock we want to avoid wraparound when converting from
ticks to nsec over a much longer window, so we force a shift of 10.
And for clocksource it seems dodgy to use a 5-sec minsec as well, so we
copy some other platforms and force a shift of 22.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>

Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>

Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: Eric Paris <eparis@redhat.com>

9c867fbe "partitions: fix sometimes unreadable partition strings" coverted
one line within the ibm partition code incorrectly. Fix this to get rid of
a build error.

fs/partitions/ibm.c: In function 'ibm_partition':
[...]
fs/partitions/ibm.c:185: error: too many arguments to function 'strlcat'

Cc: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

Fix this warning:

arch/s390/appldata/appldata_net_sum.c: In function 'appldata_get_net_sum_data':
arch/s390/appldata/appldata_net_sum.c:89: warning: initialization from incompatible pointer type

which was introduced with be1f3c2c
"net: Enable 64-bit net device statistics on 32-bit architectures"
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

warning: (ZCRYPT && CRYPTO && CRYPTO_HW && S390 && ZCRYPT=y) selects
ZCRYPT_MONOLITHIC which has unmet direct dependencies (ZCRYPT=m)

ZCRYPT_MONOLITHIC should not depend on ZCRYPT="m" when it gets
selected if ZCRYPT="y".
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

commit 485d5276 "sys_personality: change
sys_personality() to accept "unsigned int" instead of u_long" changed
the syscall interface for sys_personality.
Just follow the common code change in our arch code to avoid confusion.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

Get rid of these warnings:

drivers/s390/block/dasd.c: In function '__dasd_device_check_expire':
drivers/s390/block/dasd.c:1330: warning: format '%i' expects type 'int', but argument 4 has type 'long unsigned int'
drivers/s390/block/dasd.c:1337: warning: format '%i' expects type 'int', but argument 4 has type 'long unsigned int'
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

This is a rather minimally invasive patch to solve the problem of the
user stack growing into a memory mapped area below it.  Whenever we fill
the first page of the stack segment, expand the segment down by one
page.

Now, admittedly some odd application might _want_ the stack to grow down
into the preceding memory mapping, and so we may at some point need to
make this a process tunable (some people might also want to have more
than a single page of guarding), but let's try the minimal approach
first.

Tested with trivial application that maps a single page just below the
stack, and then starts recursing.  Without this, we will get a SIGSEGV
_after_ the stack has smashed the mapping.  With this patch, we'll get a
nice SIGBUS just as the stack touches the page just above the mapping.
Requested-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

READ/WRITE seems to be a bit too generic for defines in a device
driver. Just rename them to CTCM_READ/CTCM_WRITE to avoid warnings.
Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

READ/WRITE seems to be a bit too generic for defines in a device driver.
Just rename them to READ_CHANNEL/WRITE_CHANNEL which should suffice.

Fixes this:

In file included from drivers/s390/net/claw.c:93:
drivers/s390/net/claw.h:78:1: warning: "WRITE" redefined
In file included from /home2/heicarst/linux-2.6/arch/s390/include/asm/debug.h:12,
                 from drivers/s390/net/claw.c:68:
include/linux/fs.h:156:1: warning: this is the location of the previous definition
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This reverts commit 3bcf3860 (and the
accompanying commit c1e5c954 "vfs/fsnotify: fsnotify_close can delay
the final work in fput" that was a horribly ugly hack to make it work at
all).

The 'struct file' approach not only causes that disgusting hack, it
somehow breaks pulseaudio, probably due to some other subtlety with
f_count handling.

Fix up various conflicts due to later fsnotify work.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

This commit:

 de5d9bf6: Move list types from <linux/list.h> to <linux/types.h>.

Moved the list head data types out of list.h, breaking the build.
Add them to the perf types.h as well.

Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

Merge reason: Fix upstream breakage introduced by:

 de5d9bf6: Move list types from <linux/list.h> to <linux/types.h>.
Signed-off-by: Ingo Molnar <mingo@elte.hu>

Previous patch relied on DNS_RESOLVER setting CONFIG_KEYS
but needs to be selected in NFS config when using the new
DNS resolver
Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
CC: David Howells <dhowells@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

v4l2-ctrls.c needs to include slab.h to prevent build errors:

drivers/media/video/v4l2-ctrls.c:766: error: implicit declaration of function 'kzalloc'
drivers/media/video/v4l2-ctrls.c:786: error: implicit declaration of function 'kfree'
drivers/media/video/v4l2-ctrls.c:1528: error: implicit declaration of function 'kmalloc'
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

warning: (VIDEO_BT848 && MEDIA_SUPPORT && VIDEO_CAPTURE_DRIVERS && VIDEO_DEV && PCI && I2C && VIDEO_V4L2 && INPUT || VIDEO_SAA7134 && MEDIA_SUPPORT && VIDEO_CAPTURE_DRIVERS && VIDEO_V4L2 && VIDEO_DEV && PCI && I2C && INPUT || VIDEO_CX88 && MEDIA_SUPPORT && VIDEO_CAPTURE_DRIVERS && VIDEO_V4L2 && VIDEO_DEV && PCI && I2C && INPUT || VIDEO_IVTV && MEDIA_SUPPORT && VIDEO_CAPTURE_DRIVERS && VIDEO_V4L2 && PCI && I2C && INPUT || VIDEO_CX18 && MEDIA_SUPPORT && VIDEO_CAPTURE_DRIVERS && VIDEO_V4L2 && DVB_CORE && PCI && I2C && EXPERIMENTAL && INPUT || VIDEO_EM28XX && MEDIA_SUPPORT && VIDEO_CAPTURE_DRIVERS && VIDEO_V4L2 && V4L_USB_DRIVERS && USB && VIDEO_DEV && I2C && INPUT || VIDEO_TLG2300 && MEDIA_SUPPORT && VIDEO_CAPTURE_DRIVERS && VIDEO_V4L2 && V4L_USB_DRIVERS && USB && VIDEO_DEV && I2C && INPUT && SND && DVB_CORE || VIDEO_CX231XX && MEDIA_SUPPORT && VIDEO_CAPTURE_DRIVERS && VIDEO_V4L2 && V4L_USB_DRIVERS && USB && VIDEO_DEV && I2C && INPUT || DVB_BUDGET_CI && MEDIA_SUPPORT && DVB_CAPTURE_DRIVERS && DVB_CORE && DVB_BUDGET_CORE && I2C && INPUT || DVB_DM1105 && MEDIA_SUPPORT && DVB_CAPTURE_DRIVERS && DVB_CORE && PCI && I2C && INPUT || VIDEO_GO7007 && STAGING && !STAGING_EXCLUDE_BUILD && VIDEO_DEV && PCI && I2C && INPUT && SND || VIDEO_CX25821 && STAGING && !STAGING_EXCLUDE_BUILD && DVB_CORE && VIDEO_DEV && PCI && I2C && INPUT) selects VIDEO_IR which has unmet direct dependencies (IR_CORE)
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

As pointed by Randy Dunlap <randy.dunlap@oracle.com>:
> ERROR: "ir_keydown" [drivers/media/video/ir-kbd-i2c.ko] undefined!
> ERROR: "__ir_input_register" [drivers/media/video/ir-kbd-i2c.ko] undefined!
> ERROR: "get_rc_map" [drivers/media/video/ir-kbd-i2c.ko] undefined!
> ERROR: "ir_input_unregister" [drivers/media/video/ir-kbd-i2c.ko] undefined!
> ERROR: "get_rc_map" [drivers/media/video/cx88/cx88xx.ko] undefined!
> ERROR: "ir_repeat" [drivers/media/video/cx88/cx88xx.ko] undefined!
> ERROR: "ir_input_unregister" [drivers/media/video/cx88/cx88xx.ko] undefined!
> ERROR: "ir_keydown" [drivers/media/video/cx88/cx88xx.ko] undefined!
> ERROR: "__ir_input_register" [drivers/media/video/cx88/cx88xx.ko] undefined!
> ERROR: "get_rc_map" [drivers/media/video/bt8xx/bttv.ko] undefined!
> ERROR: "ir_input_unregister" [drivers/media/video/bt8xx/bttv.ko] undefined!
> ERROR: "__ir_input_register" [drivers/media/video/bt8xx/bttv.ko] undefined!
> ERROR: "ir_g_keycode_from_table" [drivers/media/IR/ir-common.ko] undefined!
>
>
> #5101:
> (.text+0x8306e2): undefined reference to `ir_core_debug'
> (.text+0x830729): undefined reference to `ir_core_debug'
> ir-functions.c:(.text+0x830906): undefined reference to `ir_core_debug'
> (.text+0x8309d8): undefined reference to `ir_g_keycode_from_table'
> (.text+0x830acf): undefined reference to `ir_core_debug'
> (.text+0x830b92): undefined reference to `ir_core_debug'
> (.text+0x830bef): undefined reference to `ir_core_debug'
> (.text+0x830c6a): undefined reference to `ir_core_debug'
> (.text+0x830cf7): undefined reference to `ir_core_debug'
> budget-ci.c:(.text+0x89f5c8): undefined reference to `ir_keydown'
> budget-ci.c:(.text+0x8a0c58): undefined reference to `get_rc_map'
> budget-ci.c:(.text+0x8a0c80): undefined reference to `__ir_input_register'
> budget-ci.c:(.text+0x8a0ee0): undefined reference to `get_rc_map'
> budget-ci.c:(.text+0x8a11cd): undefined reference to `ir_input_unregister'
> (.text+0x8a8adb): undefined reference to `ir_input_unregister'
> dvb-usb-remote.c:(.text+0x8a9188): undefined reference to `get_rc_map'
> dvb-usb-remote.c:(.text+0x8a91b1): undefined reference to `__ir_input_register'
> dvb-usb-remote.c:(.text+0x8a9238): undefined reference to `get_rc_map'
> dib0700_core.c:(.text+0x8b04ca): undefined reference to `ir_keydown'
> dib0700_devices.c:(.text+0x8b2ea8): undefined reference to `ir_keydown'
> dib0700_devices.c:(.text+0x8b2ef0): undefined reference to `ir_keydown'

Those breakages seem to be caused by two bad things at IR_CORE Kconfig:

1) cx23885 is using select for IR_CORE;
2) the dvb-usb and sms dependency for IR_CORE were missing.

While here, allow users to un-select IR.
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

* 'io_remap_pfn_range' of git://www.jni.nu/cris:
  CRIS: Define io_remap_pfn_range as remap_pfn_range

* git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm: (33 commits)
  dm mpath: support discard
  dm stripe: support discards
  dm: split discard requests on target boundaries
  dm stripe: optimize sector division
  dm stripe: move sector translation to a function
  dm: error return error for discards
  dm delay: support discard
  dm: zero silently drop discards
  dm: use dm_target_offset macro
  dm: factor out max_io_len_target_boundary
  dm: use common __issue_target_request for flush and discard support
  dm: linear support discard
  dm crypt: simplify crypt_ctr
  dm crypt: simplify crypt_config destruction logic
  dm: allow autoloading of dm mod
  dm: rename map_info flush_request to target_request_nr
  dm ioctl: refactor dm_table_complete
  dm snapshot: implement merge
  dm: do not initialise full request queue when bio based
  dm ioctl: make bio or request based device type immutable
  ...

* 'hwpoison' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6:
  hugetlb: add missing unlock in avoidcopy path in hugetlb_cow()
  hwpoison: rename CONFIG
  HWPOISON, hugetlb: support hwpoison injection for hugepage
  HWPOISON, hugetlb: detect hwpoison in hugetlb code
  HWPOISON, hugetlb: isolate corrupted hugepage
  HWPOISON, hugetlb: maintain mce_bad_pages in handling hugepage error
  HWPOISON, hugetlb: set/clear PG_hwpoison bits on hugepage
  HWPOISON, hugetlb: enable error handling path for hugepage
  hugetlb, rmap: add reverse mapping for hugepage
  hugetlb: move definition of is_vm_hugetlb_page() to hugepage_inline.h

Fix up trivial conflicts in mm/memory-failure.c