[PATCH] mm: page_state comment more
authorNick Piggin <npiggin@suse.de>
Wed, 22 Mar 2006 08:08:06 +0000 (00:08 -0800)
committerLinus Torvalds <torvalds@g5.osdl.org>
Wed, 22 Mar 2006 15:53:58 +0000 (07:53 -0800)
Clarify that preemption needs to be guarded against with the
__xxx_page_state functions.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
include/linux/page-flags.h

index 8cef69d462f2dee81e076b57ffc3a651138d92a0..9ea629c02a4b98fc7cf06c71b9dd9c74b5a15bde 100644 (file)
@@ -86,8 +86,9 @@
  * - The __xxx_page_state variants can be used safely when interrupts are
  * disabled.
  * - The __xxx_page_state variants can be used if the field is only
- * modified from process context, or only modified from interrupt context.
- * In this case, the field should be commented here.
+ * modified from process context and protected from preemption, or only
+ * modified from interrupt context.  In this case, the field should be
+ * commented here.
  */
 struct page_state {
        unsigned long nr_dirty;         /* Dirty writeable pages */