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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-12-13 21:34:47 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-12-13 21:34:47 +0100 |
| commit | e6efef7260ac2bb170059980a78440499f2cc0db (patch) | |
| tree | 9d2917ba865190d9be0b5204a7254ca2aea49cc1 /mm/percpu.c | |
| parent | Merge tag 'char-misc-4.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/g... (diff) | |
| parent | percpu: ensure the requested alignment is power of two (diff) | |
| download | linux-e6efef7260ac2bb170059980a78440499f2cc0db.tar.xz linux-e6efef7260ac2bb170059980a78440499f2cc0db.zip | |
Merge branch 'for-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
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
Diffstat (limited to 'mm/percpu.c')
| -rw-r--r-- | mm/percpu.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/mm/percpu.c b/mm/percpu.c index f696385bcc44..0686f566d347 100644 --- a/mm/percpu.c +++ b/mm/percpu.c @@ -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; |