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author | Dave Young <hidave.darkstar@gmail.com> | 2010-10-26 14:22:06 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-26 16:52:10 -0700 |
commit | e1ca7788dec6773b1a2bce51b7141948f2b8bccf (patch) | |
tree | 500edef0ca88f398647f99e63be0a38307314319 /mm/nommu.c | |
parent | 7bbc0905ea4f7a471a7f79d0bea5d538f5114fc9 (diff) | |
download | op-kernel-dev-e1ca7788dec6773b1a2bce51b7141948f2b8bccf.zip op-kernel-dev-e1ca7788dec6773b1a2bce51b7141948f2b8bccf.tar.gz |
mm: add vzalloc() and vzalloc_node() helpers
Add vzalloc() and vzalloc_node() to encapsulate the
vmalloc-then-memset-zero operation.
Use __GFP_ZERO to zero fill the allocated memory.
Signed-off-by: Dave Young <hidave.darkstar@gmail.com>
Cc: Christoph Lameter <cl@linux-foundation.org>
Acked-by: Greg Ungerer <gerg@snapgear.com>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/nommu.c')
-rw-r--r-- | mm/nommu.c | 49 |
1 files changed, 48 insertions, 1 deletions
@@ -293,11 +293,58 @@ void *vmalloc(unsigned long size) } EXPORT_SYMBOL(vmalloc); +/* + * vzalloc - allocate virtually continguos memory with zero fill + * + * @size: allocation size + * + * Allocate enough pages to cover @size from the page level + * allocator and map them into continguos kernel virtual space. + * The memory allocated is set to zero. + * + * For tight control over page level allocator and protection flags + * use __vmalloc() instead. + */ +void *vzalloc(unsigned long size) +{ + return __vmalloc(size, GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO, + PAGE_KERNEL); +} +EXPORT_SYMBOL(vzalloc); + +/** + * vmalloc_node - allocate memory on a specific node + * @size: allocation size + * @node: numa node + * + * Allocate enough pages to cover @size from the page level + * allocator and map them into contiguous kernel virtual space. + * + * For tight control over page level allocator and protection flags + * use __vmalloc() instead. + */ void *vmalloc_node(unsigned long size, int node) { return vmalloc(size); } -EXPORT_SYMBOL(vmalloc_node); + +/** + * vzalloc_node - allocate memory on a specific node with zero fill + * @size: allocation size + * @node: numa node + * + * Allocate enough pages to cover @size from the page level + * allocator and map them into contiguous kernel virtual space. + * The memory allocated is set to zero. + * + * For tight control over page level allocator and protection flags + * use __vmalloc() instead. + */ +void *vzalloc_node(unsigned long size, int node) +{ + return vzalloc(size); +} +EXPORT_SYMBOL(vzalloc_node); #ifndef PAGE_KERNEL_EXEC # define PAGE_KERNEL_EXEC PAGE_KERNEL |