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percpu: fix too low alignment restriction on UP

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UP __alloc_percpu() triggered WARN_ON_ONCE() if the requested
alignment is larger than that of unsigned long long, which is too
small for all the cacheline aligned allocations.  Bump it up to
SMP_CACHE_BYTES which kmalloc allocations generally guarantee.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Tejun Heo
2009-02-26 10:54:17 +09:00
parent d2b0261506
commit e317603694
1 changed files with 1 additions and 1 deletions
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include/linux/percpu.h
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@@ -156,7 +156,7 @@ static inline void *__alloc_percpu(size_t size, size_t align)
* on it. Larger alignment should only be used for module * on it. Larger alignment should only be used for module
* percpu sections on SMP for which this path isn't used. * percpu sections on SMP for which this path isn't used.
*/ */
WARN_ON_ONCE(align > __alignof__(unsigned long long)); WARN_ON_ONCE(align > SMP_CACHE_BYTES);
return kzalloc(size, GFP_KERNEL); return kzalloc(size, GFP_KERNEL);
} }