aboutsummaryrefslogtreecommitdiffstats
path: root/include/linux/gfp.h
diff options
context:
space:
mode:
authorChristoph Lameter <clameter@sgi.com>2006-09-26 02:31:14 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-09-26 11:48:46 -0400
commite53ef38d05dd59ed281a35590e4a5b64d8ff4c52 (patch)
tree42e525df84454e89abd6cab8d7983a6a0188b6bb /include/linux/gfp.h
parentfb0e7942bdcbbd2f90e61cb4cfa4fa892a873f8a (diff)
[PATCH] reduce MAX_NR_ZONES: make ZONE_HIGHMEM optional
Make ZONE_HIGHMEM optional - ifdef out code and definitions related to CONFIG_HIGHMEM - __GFP_HIGHMEM falls back to normal allocations if there is no ZONE_HIGHMEM - GFP_ZONEMASK becomes 0x01 if there is no DMA32 and no HIGHMEM zone. [jdike@addtoit.com: build fix] Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Christoph Lameter <clameter@engr.sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/gfp.h')
-rw-r--r--include/linux/gfp.h18
1 files changed, 10 insertions, 8 deletions
diff --git a/include/linux/gfp.h b/include/linux/gfp.h
index 14610b56c13..2a2153ebfe0 100644
--- a/include/linux/gfp.h
+++ b/include/linux/gfp.h
@@ -9,17 +9,19 @@ struct vm_area_struct;
9 9
10/* 10/*
11 * GFP bitmasks.. 11 * GFP bitmasks..
12 *
13 * Zone modifiers (see linux/mmzone.h - low three bits)
14 *
15 * These may be masked by GFP_ZONEMASK to make allocations with this bit
16 * set fall back to ZONE_NORMAL.
17 *
18 * Do not put any conditional on these. If necessary modify the definitions
19 * without the underscores and use the consistently. The definitions here may
20 * be used in bit comparisons.
12 */ 21 */
13/* Zone modifiers in GFP_ZONEMASK (see linux/mmzone.h - low three bits) */
14#define __GFP_DMA ((__force gfp_t)0x01u) 22#define __GFP_DMA ((__force gfp_t)0x01u)
15#define __GFP_HIGHMEM ((__force gfp_t)0x02u) 23#define __GFP_HIGHMEM ((__force gfp_t)0x02u)
16#ifndef CONFIG_ZONE_DMA32 24#define __GFP_DMA32 ((__force gfp_t)0x04u)
17#define __GFP_DMA32 ((__force gfp_t)0x01) /* ZONE_DMA is ZONE_DMA32 */
18#elif BITS_PER_LONG < 64
19#define __GFP_DMA32 ((__force gfp_t)0x00) /* ZONE_NORMAL is ZONE_DMA32 */
20#else
21#define __GFP_DMA32 ((__force gfp_t)0x04) /* Has own ZONE_DMA32 */
22#endif
23 25
24/* 26/*
25 * Action modifiers - doesn't change the zoning 27 * Action modifiers - doesn't change the zoning