Commit e3176036 authored Feb 26, 2009 by Tejun Heo

percpu: fix too low alignment restriction on UP



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>

parent d2b02615

include/linux/percpu.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -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
		* 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);
		}

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