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Merge branch 'for-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu

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Pull percpu update from Tejun Heo:
 "This includes just one patch to reject non-power-of-2 alignments and
  trigger warning. Interestingly, this actually caught a bug in XEN
  ARM64"

* 'for-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu:
  percpu: ensure the requested alignment is power of two
This commit is contained in:
Linus Torvalds
2016-12-13 12:34:47 -08:00
parent b78b499a67 3ca45a46f8
commit e6efef7260
2 changed files with 3 additions and 1 deletions
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3
mm/percpu.c
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@@ -886,7 +886,8 @@ static void __percpu *pcpu_alloc(size_t size, size_t align, bool reserved,
size = ALIGN(size, 2);
if (unlikely(!size || size > PCPU_MIN_UNIT_SIZE || align > PAGE_SIZE)) {
if (unlikely(!size || size > PCPU_MIN_UNIT_SIZE || align > PAGE_SIZE ||
!is_power_of_2(align))) {
WARN(true, "illegal size (%zu) or align (%zu) for percpu allocation\n",
size, align);
return NULL;