diff options
| author | Christoph Lameter <clameter@sgi.com> | 2005-01-04 23:36:59 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-01-04 23:36:59 -0800 |
| commit | 76af7e63a1304bc7ecd93c24320315d2e12df197 (patch) | |
| tree | 4a9ddfaef44d20d5b0f2818665e4889957311d81 /include/linux | |
| parent | 904e737b7ccca4eb807db430320f0fea7c2a6c9a (diff) | |
[PATCH] Make page allocator aware of requests for zeroed memory
Thisintroduces __GFP_ZERO as an additional gfp_mask element to allow to
request zeroed pages from the page allocator:
- Modifies the page allocator so that it zeroes memory if __GFP_ZERO is
set
- Replace all page zeroing after allocating pages by prior allocations with
allocations using __GFP_ZERO
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/gfp.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/gfp.h b/include/linux/gfp.h index 600f83c80aad..823589766569 100644 --- a/include/linux/gfp.h +++ b/include/linux/gfp.h @@ -37,6 +37,7 @@ struct vm_area_struct; #define __GFP_NORETRY 0x1000 /* Do not retry. Might fail */ #define __GFP_NO_GROW 0x2000 /* Slab internal usage */ #define __GFP_COMP 0x4000 /* Add compound page metadata */ +#define __GFP_ZERO 0x8000 /* Return zeroed page on success */ #define __GFP_BITS_SHIFT 16 /* Room for 16 __GFP_FOO bits */ #define __GFP_BITS_MASK ((1 << __GFP_BITS_SHIFT) - 1) @@ -52,6 +53,7 @@ struct vm_area_struct; #define GFP_KERNEL (__GFP_WAIT | __GFP_IO | __GFP_FS) #define GFP_USER (__GFP_WAIT | __GFP_IO | __GFP_FS) #define GFP_HIGHUSER (__GFP_WAIT | __GFP_IO | __GFP_FS | __GFP_HIGHMEM) +#define GFP_HIGHZERO (__GFP_WAIT | __GFP_IO | __GFP_FS | __GFP_HIGHMEM | __GFP_ZERO) /* Flag - indicates that the buffer will be suitable for DMA. Ignored on some platforms, used as appropriate on others */ |