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Linus Torvalds 60815cf2e0 kernel: Provide READ_ONCE and ASSIGN_ONCE 
As discussed on LKML http://marc.info/?i=54611D86.4040306%40de.ibm.com
 ACCESS_ONCE might fail with specific compilers for non-scalar accesses.
 
 Here is a set of patches to tackle that problem.
 
 The first patch introduce READ_ONCE and ASSIGN_ONCE. If the data structure
 is larger than the machine word size memcpy is used and a warning is emitted.
 The next patches fix up several in-tree users of ACCESS_ONCE on non-scalar
 types.
 
 This merge does not yet contain a patch that forces ACCESS_ONCE to work only
 on scalar types. This is targetted for the next merge window as Linux next
 already contains new offenders regarding ACCESS_ONCE vs. non-scalar types.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/borntraeger/linux

Pull ACCESS_ONCE cleanup preparation from Christian Borntraeger:
 "kernel: Provide READ_ONCE and ASSIGN_ONCE

  As discussed on LKML http://marc.info/?i=54611D86.4040306%40de.ibm.com
  ACCESS_ONCE might fail with specific compilers for non-scalar
  accesses.

  Here is a set of patches to tackle that problem.

  The first patch introduce READ_ONCE and ASSIGN_ONCE.  If the data
  structure is larger than the machine word size memcpy is used and a
  warning is emitted.  The next patches fix up several in-tree users of
  ACCESS_ONCE on non-scalar types.

  This does not yet contain a patch that forces ACCESS_ONCE to work only
  on scalar types.  This is targetted for the next merge window as Linux
  next already contains new offenders regarding ACCESS_ONCE vs.
  non-scalar types"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/borntraeger/linux:
  s390/kvm: REPLACE barrier fixup with READ_ONCE
  arm/spinlock: Replace ACCESS_ONCE with READ_ONCE
  arm64/spinlock: Replace ACCESS_ONCE READ_ONCE
  mips/gup: Replace ACCESS_ONCE with READ_ONCE
  x86/gup: Replace ACCESS_ONCE with READ_ONCE
  x86/spinlock: Replace ACCESS_ONCE with READ_ONCE
  mm: replace ACCESS_ONCE with READ_ONCE or barriers
  kernel: Provide READ_ONCE and ASSIGN_ONCE
 		2014-12-20 16:48:59 -08:00
..
Makefile MIPS: mm: Only build one microassembler that is suitable 2014-11-24 07:45:36 +01:00
c-octeon.c MIPS: Call find_vma with the mmap_sem held 2014-06-03 22:19:09 +02:00
c-r3k.c mips: delete non-required instances of include <linux/init.h> 2014-01-24 22:39:56 +01:00
c-r4k.c MIPS: BMIPS: Add special cache handling in c-r4k.c 2014-11-24 07:45:12 +01:00
c-tx39.c MIPS: Delete __cpuinit/__CPUINIT usage from MIPS code 2013-07-14 19:36:51 -04:00
cache.c MIPS: Remove race window in page fault handling 2014-08-19 13:31:09 +02:00
cerr-sb1.c MIPS: Sibyte: Fix build for SIBYTE_BW_TRACE on BCM1x55 and BCM1x80. 2013-06-21 18:07:02 +02:00
cex-gen.S MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
cex-oct.S MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
cex-sb1.S mips: delete non-required instances of include <linux/init.h> 2014-01-24 22:39:56 +01:00
dma-default.c MIPS: DMA: Explain the lack of special handling for R14000/R16000. 2014-11-24 07:45:08 +01:00
extable.c MIPS: Eleminate filenames from comments 2009-08-03 17:52:40 +01:00
fault.c arch: mm: pass userspace fault flag to generic fault handler 2013-09-12 15:38:01 -07:00
gup.c kernel: Provide READ_ONCE and ASSIGN_ONCE 2014-12-20 16:48:59 -08:00
highmem.c MIPS: Highmem: Fix build error if CONFIG_DEBUG_HIGHMEM is disabled 2012-12-13 18:15:27 +01:00
hugetlbpage.c hugetlb: restrict hugepage_migration_support() to x86_64 2014-06-04 16:53:51 -07:00
init.c MIPS: Replace MIPS-specific 64BIT_PHYS_ADDR with generic PHYS_ADDR_T_64BIT 2014-11-24 22:46:44 +01:00
ioremap.c MIPS: Replace use of phys_t with phys_addr_t. 2014-11-24 22:47:31 +01:00
mmap.c mm: remove free_area_cache 2013-07-10 18:11:34 -07:00
page-funcs.S MIPS: Refactor 'clear_page' and 'copy_page' functions. 2012-07-19 11:23:43 +02:00
page.c MIPS: R46000: Fix Micro-assembler field overflow for R4600 V2 2014-05-28 11:08:14 +02:00
pgtable-32.c MIPS: Limit fixrange_init() to the FIXMAP region 2011-07-25 17:26:54 +01:00
pgtable-64.c MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
sc-ip22.c MIPS: Delete __cpuinit/__CPUINIT usage from MIPS code 2013-07-14 19:36:51 -04:00
sc-mips.c MIPS: Add cases for CPU_P5600 2014-03-26 23:09:11 +01:00
sc-r5k.c MIPS: Remove useless parentheses 2014-11-24 07:44:49 +01:00
sc-rm7k.c mips: delete non-required instances of include <linux/init.h> 2014-01-24 22:39:56 +01:00
tlb-funcs.S MIPS: mm: Fix broken microMIPS kernel regression. 2014-05-14 18:11:06 +02:00
tlb-r3k.c MIPS: Remove incorrect NULL check in local_flush_tlb_page() 2014-07-30 20:59:43 +02:00
tlb-r4k.c MIPS: Replace MIPS-specific 64BIT_PHYS_ADDR with generic PHYS_ADDR_T_64BIT 2014-11-24 22:46:44 +01:00
tlb-r8k.c mips: delete non-required instances of include <linux/init.h> 2014-01-24 22:39:56 +01:00
tlbex-fault.S MIPS: Don't include <asm/page.h> unnecessarily. 2012-12-28 17:04:04 +01:00
tlbex.c Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2014-12-11 17:56:37 -08:00
uasm-micromips.c MIPS: uasm: Add SLT uasm instruction 2014-06-26 10:48:19 +01:00
uasm-mips.c MIPS: Add MFHC0 and MTHC0 instructions to uasm. 2014-11-24 22:47:31 +01:00
uasm.c MIPS: Add MFHC0 and MTHC0 instructions to uasm. 2014-11-24 22:47:31 +01:00