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Commit 9329ba97 authored by Tejun Heo's avatar Tejun Heo
Browse files

percpu: update comments to reflect that percpu allocations are always zero-filled 



Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Reported-by: default avatarStephane Eranian <eranian@google.com>
parent 677243d7

mm/percpu.c

+6 −5
Original line number Diff line number Diff line
@@ -826,8 +826,8 @@ fail_unlock_mutex: 
 * @size: size of area to allocate in bytes

 * @align: alignment of area (max PAGE_SIZE)

 *

 * Allocate percpu area of @size bytes aligned at @align.  Might

 * sleep.  Might trigger writeouts.

 * Allocate zero-filled percpu area of @size bytes aligned at @align.

 * Might sleep.  Might trigger writeouts.

 *

 * CONTEXT:

 * Does GFP_KERNEL allocation.
@@ -846,9 +846,10 @@ EXPORT_SYMBOL_GPL(__alloc_percpu); 
 * @size: size of area to allocate in bytes

 * @align: alignment of area (max PAGE_SIZE)

 *

 * Allocate percpu area of @size bytes aligned at @align from reserved

 * percpu area if arch has set it up; otherwise, allocation is served

 * from the same dynamic area.  Might sleep.  Might trigger writeouts.

 * Allocate zero-filled percpu area of @size bytes aligned at @align

 * from reserved percpu area if arch has set it up; otherwise,

 * allocation is served from the same dynamic area.  Might sleep.

 * Might trigger writeouts.

 *

 * CONTEXT:

 * Does GFP_KERNEL allocation.