Mips builds with BCMA host mode enabled fail in mainline and -next
with:

In file included from include/linux/bcma/bcma.h:10:0,
                 from drivers/bcma/bcma_private.h:9,
		 from drivers/bcma/main.c:8:
include/linux/bcma/bcma_driver_pci.h:218:24: error:
	field 'pci_controller' has incomplete type

Bisect points to commit d41e6858 ("MIPS: Kconfig: Set default MIPS
system type as generic") as the culprit. Analysis shows that the commmit
changes PCI configuration and enables PCI_DRIVERS_GENERIC. This in turn
disables PCI_DRIVERS_LEGACY. 'struct pci_controller' is, however, only
defined if PCI_DRIVERS_LEGACY is enabled.

Ultimately that means that BCMA_DRIVER_PCI_HOSTMODE depends on
PCI_DRIVERS_LEGACY. Add the missing dependency.

Fixes: d41e6858 ("MIPS: Kconfig: Set default MIPS system type as ...")
Cc: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: James Hogan <jhogan@kernel.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: James Hogan <jhogan@kernel.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

ath.git fixes for 4.15. Major changes:

wcn36xx

* fix dynamic power save which has been broken since the driver was commited

22000 devices (previously referenced as A000) can support
short transmit queues. This means that we have less DMA
descriptors (TFD) for those shorter queues.
Previous devices must still have 256 TFDs for each queue
even if those 256 TFDs point to fewer buffers.

When I introduced support for the short queues for 22000
I broke older devices by assuming that they can also have
less TFDs in their queues. This led to several problems:

1) the payload of the commands weren't unmapped properly
   which caused the SWIOTLB to complain at some point.
2) the hardware could get confused and we get hardware
   crashes.

The corresponding bugzilla entries are:

https://bugzilla.kernel.org/show_bug.cgi?id=198201
https://bugzilla.kernel.org/show_bug.cgi?id=198265

Cc: stable@vger.kernel.org # 4.14+
Fixes: 4ecab561 ("iwlwifi: pcie: support short Tx queues for A000 device family")
Reviewed-by: Sharon, Sara <sara.sharon@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

Since driver does not report hardware dynamic power saving cap,
this is up to the mac80211 to manage power saving timeout and
state machine, using the ieee80211 config callback to report
PS changes. This patch enables/disables PS mode according to
the new configuration.

Remove old behaviour enabling PS mode in a static way, this make
the device unusable when power save is enabled since device is
forced to PS regardless RX/TX traffic.
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

Merge tag 'iwlwifi-for-kalle-2017-12-05' of git://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/iwlwifi-fixes

Third batch of iwlwifi patches intended for 4.15.

* Tell mac80211 when the MAC has been stripped (9000 series);
* Tell mac80211 when the IVC has been stripped (9000 series);
* Add 2 new PCI IDs, one for 9000 and one for 22000;
* Fix a queue hang due during ROC.

When I run make W=1 on gcc (Debian 7.2.0-16) 7.2.0 I got an error for
the first run, all next ones are okay.

  CC [M]  drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.o
drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c:2078: error: Cannot parse struct or union!
scripts/Makefile.build:310: recipe for target 'drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.o' failed

Seems like something happened with W=1 and wrong kernel doc format.
As a quick fix remove dubious /** in the code.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

When RADA is active, the hardware decrypts the packets and strips off
the MIC as it is useless after decryption. Indicate that to mac80211.

Cc: stable@vger.kernel.org # 4.13+
[this is needed for the 9000-series HW to work properly]
Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

Set the flag that indicates that ICV was stripped on if
this option was enabled in the HW.

Cc: stable@vger.kernel.org # 4.13+
[this is needed for the 9000-series HW to work properly]
Signed-off-by: David Spinadel <david.spinadel@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

Before deleting a time event (remain-on-channel instance), flush
the queue so that frames cannot get stuck on it. We already flush
the AUX STA queues, but a separate station is used for the P2P
Device queue.

Cc: stable@vger.kernel.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

add 1 PCI ID for 9260 series and 1 for 22000 series.

Cc: stable@vger.kernel.org
Signed-off-by: Ihab Zhaika <ihab.zhaika@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

In the function brcmf_sdio_firmware_callback() the driver is
unbound from the sdio function devices in the error path.
However, the order in which it is done resulted in a use-after-free
issue (see brcmf_ops_sdio_remove() in bcmsdh.c). Hence change
the order and first unbind sdio function #2 device and then
unbind sdio function #1 device.

Cc: stable@vger.kernel.org # v4.12.x
Fixes: 7a51461f ("brcmfmac: unbind all devices upon failure in firmware callback")
Reported-by: Stefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: Hante Meuleman <hante.meuleman@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieter-paul.giesberts@broadcom.com>
Reviewed-by: Franky Lin <franky.lin@broadcom.com>
Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

Merge tag 'iwlwifi-for-kalle-2017-11-28' of git://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/iwlwifi-fixes

Second batch of fixes intended for 4.15.

* One fix in rate-scaling;
* One fix for the TX queue hang detection for AP/GO modes;
* Fix the TX queue hang timeout used in monitor interfaces;
* Fix packet injection;
* Remove a wrong error message when dumping PCI registers;
* Fix race condition with RF-kill;

After parsing the sit netlink change info, we forget to update frag_off in
ipip6_tunnel_update(). Fix it by assigning frag_off with new value.
Reported-by: Jianlin Shi <jishi@redhat.com>
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

tcp_v6_send_reset() expects to receive an skb with skb->cb[] layout as
used in TCP stack.
MD5 lookup uses tcp_v6_iif() and tcp_v6_sdif() and thus
TCP_SKB_CB(skb)->header.h6

This patch probably fixes RST packets sent on behalf of a timewait md5
ipv6 socket.

Before Florian patch, tcp_v6_restore_cb() was needed before jumping to
no_tcp_socket label.

Fixes: 271c3b9b ("tcp: honour SO_BINDTODEVICE for TW_RST case too")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Florian Westphal <fw@strlen.de>
Acked-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Similar to commit d7fb60b9 ("net_sched: get rid of tcfa_rcu"),
TC actions don't need to respect RCU grace period, because it
is either just detached from tc filter (standalone case) or
it is removed together with tc filter (bound case) in which case
RCU grace period is already respected at filter layer.

Fixes: 5c5670fa ("net/sched: Introduce sample tc action")
Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: Yotam Gigi <yotamg@mellanox.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

David Howells says:

====================
rxrpc: Fixes

Here are three patches for AF_RXRPC.  One removes some whitespace, one
fixes terminal ACK generation and the third makes a couple of places
actually use the timeout value just determined rather than ignoring it.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

The driver expect "allwinner,leds-active-low" to be in PHY node, but
the binding doc expect it to be in MAC node.

Since all board DT use it also in MAC node, the driver need to search
allwinner,leds-active-low in MAC node.
Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: David S. Miller <davem@davemloft.net>

Reserved and unused fields in the Tx descriptors should be 0. The PPv2
driver doesn't clear them at run-time (for performance reasons) but
these descriptors aren't zeroed when allocated, which can lead to
unpredictable behaviors. This patch fixes this by using
dma_zalloc_coherent instead of dma_alloc_coherent.

Fixes: 3f518509 ("ethernet: Add new driver for Marvell Armada 375 network unit")
Signed-off-by: Yan Markman <ymarkman@marvell.com>
[Antoine: commit message]
Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Pull nfsd fixes from Bruce Fields:
 "I screwed up my merge window pull request; I only sent half of what I
  meant to.

  There were no new features, just bugfixes of various importance and
  some very minor cleanup, so I think it's all still appropriate for
  -rc2.

  Highlights:

   - Fixes from Trond for some races in the NFSv4 state code.

   - Fix from Naofumi Honda for a typo in the blocked lock notificiation
     code

   - Fixes from Vasily Averin for some problems starting and stopping
     lockd especially in network namespaces"

* tag 'nfsd-4.15-1' of git://linux-nfs.org/~bfields/linux: (23 commits)
  lockd: fix "list_add double add" caused by legacy signal interface
  nlm_shutdown_hosts_net() cleanup
  race of nfsd inetaddr notifiers vs nn->nfsd_serv change
  race of lockd inetaddr notifiers vs nlmsvc_rqst change
  SUNRPC: make cache_detail structures const
  NFSD: make cache_detail structures const
  sunrpc: make the function arg as const
  nfsd: check for use of the closed special stateid
  nfsd: fix panic in posix_unblock_lock called from nfs4_laundromat
  lockd: lost rollback of set_grace_period() in lockd_down_net()
  lockd: added cleanup checks in exit_net hook
  grace: replace BUG_ON by WARN_ONCE in exit_net hook
  nfsd: fix locking validator warning on nfs4_ol_stateid->st_mutex class
  lockd: remove net pointer from messages
  nfsd: remove net pointer from debug messages
  nfsd: Fix races with check_stateid_generation()
  nfsd: Ensure we check stateid validity in the seqid operation checks
  nfsd: Fix race in lock stateid creation
  nfsd4: move find_lock_stateid
  nfsd: Ensure we don't recognise lock stateids after freeing them
  ...

Pull btrfs fixes from David Sterba:
 "We've collected some fixes in since the pre-merge window freeze.

  There's technically only one regression fix for 4.15, but the rest
  seems important and candidates for stable.

   - fix missing flush bio puts in error cases (is serious, but rarely
     happens)

   - fix reporting stat::st_blocks for buffered append writes

   - fix space cache invalidation

   - fix out of bound memory access when setting zlib level

   - fix potential memory corruption when fsync fails in the middle

   - fix crash in integrity checker

   - incremetnal send fix, path mixup for certain unlink/rename
     combination

   - pass flags to writeback so compressed writes can be throttled
     properly

   - error handling fixes"

* tag 'for-4.15-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  Btrfs: incremental send, fix wrong unlink path after renaming file
  btrfs: tree-checker: Fix false panic for sanity test
  Btrfs: fix list_add corruption and soft lockups in fsync
  btrfs: Fix wild memory access in compression level parser
  btrfs: fix deadlock when writing out space cache
  btrfs: clear space cache inode generation always
  Btrfs: fix reported number of inode blocks after buffered append writes
  Btrfs: move definition of the function btrfs_find_new_delalloc_bytes
  Btrfs: bail out gracefully rather than BUG_ON
  btrfs: dev_alloc_list is not protected by RCU, use normal list_del
  btrfs: add missing device::flush_bio puts
  btrfs: Fix transaction abort during failure in btrfs_rm_dev_item
  Btrfs: add write_flags for compression bio

Pull Microblaze fix from Michal Simek:
 "Add missing header to mmu_context_mm.h"

* tag 'microblaze-4.15-rc2' of git://git.monstr.eu/linux-2.6-microblaze:
  microblaze: add missing include to mmu_context_mm.h

Pull sparc fix from David Miller:
 "Sparc T4 and later cpu bootup regression fix"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  sparc64: Fix boot on T4 and later.

Pull networking fixes from David Miller:

 1) The forcedeth conversion from pci_*() DMA interfaces to dma_*() ones
    missed one spot. From Zhu Yanjun.

 2) Missing CRYPTO_SHA256 Kconfig dep in cfg80211, from Johannes Berg.

 3) Fix checksum offloading in thunderx driver, from Sunil Goutham.

 4) Add SPDX to vm_sockets_diag.h, from Stephen Hemminger.

 5) Fix use after free of packet headers in TIPC, from Jon Maloy.

 6) "sizeof(ptr)" vs "sizeof(*ptr)" bug in i40e, from Gustavo A R Silva.

 7) Tunneling fixes in mlxsw driver, from Petr Machata.

 8) Fix crash in fanout_demux_rollover() of AF_PACKET, from Mike
    Maloney.

 9) Fix race in AF_PACKET bind() vs. NETDEV_UP notifier, from Eric
    Dumazet.

10) Fix regression in sch_sfq.c due to one of the timer_setup()
    conversions. From Paolo Abeni.

11) SCTP does list_for_each_entry() using wrong struct member, fix from
    Xin Long.

12) Don't use big endian netlink attribute read for
    IFLA_BOND_AD_ACTOR_SYSTEM, it is in cpu endianness. Also from Xin
    Long.

13) Fix mis-initialization of q->link.clock in CBQ scheduler, preventing
    adding filters there. From Jiri Pirko.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (67 commits)
  ethernet: dwmac-stm32: Fix copyright
  net: via: via-rhine: use %p to format void * address instead of %x
  net: ethernet: xilinx: Mark XILINX_LL_TEMAC broken on 64-bit
  myri10ge: Update MAINTAINERS
  net: sched: cbq: create block for q->link.block
  atm: suni: remove extraneous space to fix indentation
  atm: lanai: use %p to format kernel addresses instead of %x
  VSOCK: Don't set sk_state to TCP_CLOSE before testing it
  atm: fore200e: use %pK to format kernel addresses instead of %x
  ambassador: fix incorrect indentation of assignment statement
  vxlan: use __be32 type for the param vni in __vxlan_fdb_delete
  bonding: use nla_get_u64 to extract the value for IFLA_BOND_AD_ACTOR_SYSTEM
  sctp: use right member as the param of list_for_each_entry
  sch_sfq: fix null pointer dereference at timer expiration
  cls_bpf: don't decrement net's refcount when offload fails
  net/packet: fix a race in packet_bind() and packet_notifier()
  packet: fix crash in fanout_demux_rollover()
  sctp: remove extern from stream sched
  sctp: force the params with right types for sctp csum apis
  sctp: force SCTP_ERROR_INV_STRM with __u32 when calling sctp_chunk_fail
  ...

If we don't put the NG4fls.o object into the same part of
the link as the generic sparc64 objects for fls() and __fls()
then the relocation in the branch we use for patching will
not fit.

Move NG4fls.o into lib-y to fix this problem.

Fixes: 46ad8d2d ("sparc64: Use sparc optimized fls and __fls for T4 and above")
Signed-off-by: David S. Miller <davem@davemloft.net>
Reported-by: Anatoly Pugachev <matorola@gmail.com>
Tested-by: Anatoly Pugachev <matorola@gmail.com>

Instead, just fall back on the new '%p' behavior which hashes the
pointer.

Otherwise, '%pK' - that was intended to mark a pointer as restricted -
just ends up leaking pointers that a normal '%p' wouldn't leak.  Which
just make the whole thing pointless.

I suspect we should actually get rid of '%pK' entirely, and make it just
work as '%p' regardless, but this is the minimal obvious fix.  People
who actually use 'kptr_restrict' should weigh in on which behavior they
want.

Cc: Tobin Harding <me@tobin.cc>
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

The conditional kallsym hex printing used a special fixed-width '%lx'
output (KALLSYM_FMT) in preparation for the hashing of %p, but that
series ended up adding a %px specifier to help with the conversions.

Use it, and avoid the "print pointer as an unsigned long" code.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull printk pointer hashing update from Tobin Harding:
 "Here is the patch set that implements hashing of printk specifier %p.

  First we have two clean up patches then we do the hashing. Hashing is
  done via the SipHash algorithm. The next patch adds printk specifier
  %px for printing pointers when we _really_ want to see the address i.e
  %px is functionally equivalent to %lx. Final patch in the set fixes
  KASAN since we break it by hashing %p.

  For the record here is the justification for the series:

    Currently there exist approximately 14 000 places in the Kernel
    where addresses are being printed using an unadorned %p. This
    potentially leaks sensitive information about the Kernel layout in
    memory. Many of these calls are stale, instead of fixing every call
    we hash the address by default before printing. We then add %px to
    provide a way to print the actual address. Although this is
    achievable using %lx, using %px will assist us if we ever want to
    change pointer printing behaviour. %px is more uniquely grep'able
    (there are already >50 000 uses of %lx).

    The added advantage of hashing %p is that security is now opt-out,
    if you _really_ want the address you have to work a little harder
    and use %px.

  This will of course break some users, forcing code printing needed
  addresses to be updated"

[ I do expect this to be an annoyance, and a number of %px users to be
  added for debuggability. But nobody is willing to audit existing %p
  users for information leaks, and a number of places really only use
  the pointer as an object identifier rather than really 'I need the
  address'.

  IOW - sorry for the inconvenience, but it's the least inconvenient of
  the options.    - Linus ]

* tag 'printk-hash-pointer-4.15-rc2' of git://github.com/tcharding/linux:
  kasan: use %px to print addresses instead of %p
  vsprintf: add printk specifier %px
  printk: hash addresses printed with %p
  vsprintf: refactor %pK code out of pointer()
  docs: correct documentation for %pK

This reverts commit 152e93af.

It was a nice cleanup in theory, but as Nicolai Stange points out, we do
need to make the page dirty for the copy-on-write case even when we
didn't end up making it writable, since the dirty bit is what we use to
check that we've gone through a COW cycle.
Reported-by: Michal Hocko <mhocko@kernel.org>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Uniformize STMicroelectronics copyrights header
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com>
CC: Alexandre Torgue <alexandre.torgue@st.com>
Acked-by: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Don't use %x and casting to print out an address, instead use %p
and remove the casting.  Cleans up smatch warnings:

drivers/net/ethernet/via/via-rhine.c:998 rhine_init_one_common()
warn: argument 4 to %lx specifier is cast from pointer
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Values assigned to both variable resend_at and ack_at are overwritten
before they can be used.

The correct fix here is to add 'now' to the previously computed value in
resend_at and ack_at.

Addresses-Coverity-ID: 1462262
Addresses-Coverity-ID: 1462263
Addresses-Coverity-ID: 1462264
Fixes: beb8e5e4 ("rxrpc: Express protocol timeouts in terms of RTT")
Link: https://marc.info/?i=17004.1511808959%40warthog.procyon.org.ukSigned-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: David Howells <dhowells@redhat.com>

On 64-bit (e.g. powerpc64/allmodconfig):

    drivers/net/ethernet/xilinx/ll_temac_main.c: In function 'temac_start_xmit_done':
    drivers/net/ethernet/xilinx/ll_temac_main.c:633:22: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
	dev_kfree_skb_irq((struct sk_buff *)cur_p->app4);
			  ^

cdmac_bd.app4 is u32, so it is too small to hold a kernel pointer.

Note that several other fields in struct cdmac_bd are also too small to
hold physical addresses on 64-bit platforms.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: David S. Miller <davem@davemloft.net>

Repeat terminal ACKs and now terminal ACKs are now generated from the
connection event processor rather from call handling as this allows us to
discard client call structures as soon as possible and free up the channel
for a follow on call.

However, in ACKs so generated, the additional information trailer is
malformed because the padding that's meant to be in the middle isn't
included in what's transmitted.

Fix it so that the 3 bytes of padding are included in the transmission.

Further, the trailer is misaligned because of the padding, so assigment to
the u16 and u32 fields inside it might cause problems on some arches, so
fix this by breaking the padding and the trailer out of the packed struct.

(This also deals with potential compiler weirdies where some of the nested
structs are packed and some aren't).

The symptoms can be seen in wireshark as terminal DUPLICATE or IDLE ACK
packets in which the Max MTU, Interface MTU and rwind fields have weird
values and the Max Packets field is apparently missing.
Reported-by: Jeffrey Altman <jaltman@auristor.com>
Signed-off-by: David Howells <dhowells@redhat.com>

Clean up some whitespace from rxrpc.
Signed-off-by: David Howells <dhowells@redhat.com>

Change the maintainer to Chris Lee who has access to Myricom hardware
and can test/review. Update the website URL.
Signed-off-by: Hyong-Youb Kim <hykim@myri.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Pointers printed with %p are now hashed by default. Kasan needs the
actual address. We can use the new printk specifier %px for this
purpose.

Use %px instead of %p to print addresses.
Signed-off-by: Tobin C. Harding <me@tobin.cc>

printk specifier %p now hashes all addresses before printing. Sometimes
we need to see the actual unmodified address. This can be achieved using
%lx but then we face the risk that if in future we want to change the
way the Kernel handles printing of pointers we will have to grep through
the already existent 50 000 %lx call sites. Let's add specifier %px as a
clear, opt-in, way to print a pointer and maintain some level of
isolation from all the other hex integer output within the Kernel.

Add printk specifier %px to print the actual unmodified address.
Signed-off-by: Tobin C. Harding <me@tobin.cc>

Currently there exist approximately 14 000 places in the kernel where
addresses are being printed using an unadorned %p. This potentially
leaks sensitive information regarding the Kernel layout in memory. Many
of these calls are stale, instead of fixing every call lets hash the
address by default before printing. This will of course break some
users, forcing code printing needed addresses to be updated.

Code that _really_ needs the address will soon be able to use the new
printk specifier %px to print the address.

For what it's worth, usage of unadorned %p can be broken down as
follows (thanks to Joe Perches).

$ git grep -E '%p[^A-Za-z0-9]' | cut -f1 -d"/" | sort | uniq -c
   1084 arch
     20 block
     10 crypto
     32 Documentation
   8121 drivers
   1221 fs
    143 include
    101 kernel
     69 lib
    100 mm
   1510 net
     40 samples
      7 scripts
     11 security
    166 sound
    152 tools
      2 virt

Add function ptr_to_id() to map an address to a 32 bit unique
identifier. Hash any unadorned usage of specifier %p and any malformed
specifiers.
Signed-off-by: Tobin C. Harding <me@tobin.cc>

Currently code to handle %pK is all within the switch statement in
pointer(). This is the wrong level of abstraction. Each of the other switch
clauses call a helper function, pK should do the same.

Refactor code out of pointer() to new function restricted_pointer().
Signed-off-by: Tobin C. Harding <me@tobin.cc>