percpu: update comments to reflect that percpu allocations are always zero-filled
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Stephane Eranian <eranian@google.com>
diff --git a/mm/percpu.c b/mm/percpu.c
index 0cd4bf6..12dea33 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -826,8 +826,8 @@
* @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 @@
* @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.