pageflags: introduce macros to generate page flag functions
commitf94a62e910840b3552c7adb7c57e0f8b3b345f6e
authorChristoph Lameter <clameter@sgi.com>
Mon, 28 Apr 2008 09:12:49 +0000 (28 02:12 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Mon, 28 Apr 2008 15:58:22 +0000 (28 08:58 -0700)
tree31444cdd24e640beea706d9b9f8da97f3a5c1639
parent9223b4190fa1297a59f292f3419fc0285321d0ea
pageflags: introduce macros to generate page flag functions

Introduce a set of macros that generate functions to handle page flags.

A page flag function group typically starts with either

SETPAGEFLAG(<part of function name>,<part of PG_ flagname>)

to create a set of page flag operations that are atomic. Or

__SETPAGEFLAG(<part of function name>,<part of PG_ flagname)

to create a set of page flag operations that are not atomic.

Then additional operations can be added using the following macros

TESTSCFLAG Create additional atomic test-and-set and
test-and-clear functions

TESTSETFLAG Create additional test and set function
TESTCLEARFLAG Create additional test and clear function
SETPAGEFLAG Create additional atomic set function
CLEARPAGEFLAG Create additional atomic clear function
__TESTPAGEFLAG Create additional non atomic set function
__SETPAGEFLAG Create additional non atomic clear function

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Cc: Andy Whitcroft <apw@shadowen.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
include/linux/page-flags.h