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Commit a62f735cbb1a0937ab6a9196dadf752694ef0b7f

Authored by David Howells 2008-02-22 00:12:45 +0800

Committed by Linus Torvalds 2008-02-22 08:40:15 +0800

Exists in master and in 7 other branches

MM: Fix macro argument substitution in PageHead() and PageTail()

Fix macro argument substitution in PageHead() and PageTail() - 'page' should
have brackets surrounding it (commit 6d7779538f765963ced45a3fa4bed7ba8d2c277d).

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Showing 1 changed file with 2 additions and 2 deletions Inline Diff

include/linux/page-flags.h

include/linux/page-flags.h

Diff comments View file @ a62f735

1	/*	1	/*
2	* Macros for manipulating and testing page->flags	2	* Macros for manipulating and testing page->flags
3	*/	3	*/
4		4
5	#ifndef PAGE_FLAGS_H	5	#ifndef PAGE_FLAGS_H
6	#define PAGE_FLAGS_H	6	#define PAGE_FLAGS_H
7		7
8	#include <linux/types.h>	8	#include <linux/types.h>
9	#include <linux/mm_types.h>	9	#include <linux/mm_types.h>
10		10
11	/*	11	/*
12	* Various page->flags bits:	12	* Various page->flags bits:
13	*	13	*
14	* PG_reserved is set for special pages, which can never be swapped out. Some	14	* PG_reserved is set for special pages, which can never be swapped out. Some
15	* of them might not even exist (eg empty_bad_page)...	15	* of them might not even exist (eg empty_bad_page)...
16	*	16	*
17	* The PG_private bitflag is set on pagecache pages if they contain filesystem	17	* The PG_private bitflag is set on pagecache pages if they contain filesystem
18	* specific data (which is normally at page->private). It can be used by	18	* specific data (which is normally at page->private). It can be used by
19	* private allocations for its own usage.	19	* private allocations for its own usage.
20	*	20	*
21	* During initiation of disk I/O, PG_locked is set. This bit is set before I/O	21	* During initiation of disk I/O, PG_locked is set. This bit is set before I/O
22	* and cleared when writeback _starts_ or when read _completes_. PG_writeback	22	* and cleared when writeback _starts_ or when read _completes_. PG_writeback
23	* is set before writeback starts and cleared when it finishes.	23	* is set before writeback starts and cleared when it finishes.
24	*	24	*
25	* PG_locked also pins a page in pagecache, and blocks truncation of the file	25	* PG_locked also pins a page in pagecache, and blocks truncation of the file
26	* while it is held.	26	* while it is held.
27	*	27	*
28	* page_waitqueue(page) is a wait queue of all tasks waiting for the page	28	* page_waitqueue(page) is a wait queue of all tasks waiting for the page
29	* to become unlocked.	29	* to become unlocked.
30	*	30	*
31	* PG_uptodate tells whether the page's contents is valid. When a read	31	* PG_uptodate tells whether the page's contents is valid. When a read
32	* completes, the page becomes uptodate, unless a disk I/O error happened.	32	* completes, the page becomes uptodate, unless a disk I/O error happened.
33	*	33	*
34	* PG_referenced, PG_reclaim are used for page reclaim for anonymous and	34	* PG_referenced, PG_reclaim are used for page reclaim for anonymous and
35	* file-backed pagecache (see mm/vmscan.c).	35	* file-backed pagecache (see mm/vmscan.c).
36	*	36	*
37	* PG_error is set to indicate that an I/O error occurred on this page.	37	* PG_error is set to indicate that an I/O error occurred on this page.
38	*	38	*
39	* PG_arch_1 is an architecture specific page state bit. The generic code	39	* PG_arch_1 is an architecture specific page state bit. The generic code
40	* guarantees that this bit is cleared for a page when it first is entered into	40	* guarantees that this bit is cleared for a page when it first is entered into