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[PATCH] mm: page_state comment more

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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>
This commit is contained in:
Nick Piggin 2006-03-22 00:08:06 -08:00 committed by Linus Torvalds
parent 8dfcc9ba27
commit 9d41415221
1 changed files with 3 additions and 2 deletions
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5
include/linux/page-flags.h
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@ -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 */