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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-14 11:46:25 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-14 11:46:25 -0700 |
| commit | b6daa51b9a6a02a644dcf6b880fd50c1f70ec07f (patch) | |
| tree | 745ebeefb8f4225460774ef0037ca2f9022d4a4a /arch | |
| parent | f96ed2612260a8a415512eed4fe3f5c77247d4a1 (diff) | |
| parent | 9b7396624a7b503220d85428654634b60762f2b0 (diff) | |
Merge branch 'for-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
Pull percpu updates from Tejun Heo:
- Nick improved generic implementations of percpu operations which
modify the variable and return so that they calculate the physical
address only once.
- percpu_ref percpu <-> atomic mode switching improvements. The
patchset was originally posted about a year ago but fell through the
crack.
- misc non-critical fixes.
* 'for-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu:
mm/percpu.c: fix potential memory leakage for pcpu_embed_first_chunk()
mm/percpu.c: correct max_distance calculation for pcpu_embed_first_chunk()
percpu: eliminate two sparse warnings
percpu: improve generic percpu modify-return implementation
percpu-refcount: init ->confirm_switch member properly
percpu_ref: allow operation mode switching operations to be called concurrently
percpu_ref: restructure operation mode switching
percpu_ref: unify staggered atomic switching wait behavior
percpu_ref: reorganize __percpu_ref_switch_to_atomic() and relocate percpu_ref_switch_to_atomic()
percpu_ref: remove unnecessary RCU grace period for staggered atomic switching confirmation
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/include/asm/percpu.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/x86/include/asm/percpu.h b/arch/x86/include/asm/percpu.h index e02e3f80d363..84f58de08c2b 100644 --- a/arch/x86/include/asm/percpu.h +++ b/arch/x86/include/asm/percpu.h @@ -521,7 +521,8 @@ do { \ static __always_inline bool x86_this_cpu_constant_test_bit(unsigned int nr, const unsigned long __percpu *addr) { - unsigned long __percpu *a = (unsigned long *)addr + nr / BITS_PER_LONG; + unsigned long __percpu *a = + (unsigned long __percpu *)addr + nr / BITS_PER_LONG; #ifdef CONFIG_X86_64 return ((1UL << (nr % BITS_PER_LONG)) & raw_cpu_read_8(*a)) != 0; @@ -538,7 +539,7 @@ static inline bool x86_this_cpu_variable_test_bit(int nr, asm volatile("bt "__percpu_arg(2)",%1\n\t" CC_SET(c) : CC_OUT(c) (oldbit) - : "m" (*(unsigned long *)addr), "Ir" (nr)); + : "m" (*(unsigned long __percpu *)addr), "Ir" (nr)); return oldbit; } |