security: optimize avc_audit() common path

avc_audit() did a lot of jumping around and had a big stack frame, all
for the uncommon case.

Split up the uncommon case (which we really can't make go fast anyway)
into its own slow function, and mark the conditional branches
appropriately for the common likely case.

This causes avc_audit() to no longer show up as one of the hottest
functions on the branch profiles (the new "perf -b" thing), and makes
the cycle profiles look really nice and dense too.

The whole audit path is still annoyingly very much one of the biggest
costs of name lookup, so these things are worth optimizing for.  I wish
we could just tell people to turn it off, but realistically we do need
it: we just need to make sure that the overhead of the necessary evil is
as low as possible.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 patches from Martin Schwidefsky:
 "The biggest patch is the rework of the smp code, something I wanted to
  do for some time.  There are some patches for our various dump methods
  and one new thing: z/VM LGR detection.  LGR stands for linux-guest-
  relocation and is the guest migration feature of z/VM.  For debugging
  purposes we keep a log of the systems where a specific guest has lived."

Fix up trivial conflict in arch/s390/kernel/smp.c due to the scheduler
cleanup having removed some code next to removed s390 code.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  [S390] kernel: Pass correct stack for smp_call_ipl_cpu()
  [S390] Ensure that vmcore_info pointer is never accessed directly
  [S390] dasd: prevent validate server for offline devices
  [S390] Remove monolithic build option for zcrypt driver.
  [S390] stack dump: fix indentation in output
  [S390] kernel: Add OS info memory interface
  [S390] Use block_sigmask()
  [S390] kernel: Add z/VM LGR detection
  [S390] irq: external interrupt code passing
  [S390] irq: set __ARCH_IRQ_EXIT_IRQS_DISABLED
  [S390] zfcpdump: Implement async sdias event processing
  [S390] Use copy_to_absolute_zero() instead of "stura/sturg"
  [S390] rework idle code
  [S390] rework smp code
  [S390] rename lowcore field
  [S390] Fix gcc 4.6.0 compile warning
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lliubbo/blackfin

Pull blackfin updates from Bob Liu

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lliubbo/blackfin: (24 commits)
  blackfin: clean up string bfin_dma_5xx after rename.
  blackfin:dma: rename bfin_dma_5xx.c to bfin_dma.c
  bf548: ssm2602: Add ssm2602 platform data into bf548 ezkit board file.
  Blackfin: s/#if CONFIG/#ifdef CONFIG/
  Blackfin: pnav: delete duplicate linux/export.h include
  bf561: add ppi DLEN macro for 10bits to 16bits
  arch: blackfin: udpate defconfig
  Disintegrate asm/system.h for Blackfin [ver #2]
  arch/blackfin: don't generate random mac in bfin_get_ether_addr()
  Blackfin: wire up new process_vm syscalls
  blackfin: cleanup anomaly workarounds
  blackfin: update default defconfig
  blackfin: thread_info: add suspend flag
  bfin: add bfin_ad73311_machine platform device
  blackfin: bf537: stamp: update board file for 193x
  blackfin: kgdb: skip hardware watchpoint test
  bf548: add ppi interrupt mask and blanking clocks
  blackfin: bf561: forgot CSYNC in get_core_lock_noflush
  spi/bfin_spi: drop bits_per_word from client data
  blackfin: cplb-mpu: fix page mask table overflow
  ...