Messages in this thread Patch in this message | | | Date | Sat, 16 Oct 2010 12:33:31 +0800 | From | Dave Young <> | Subject | [PATCH 1/2] Add vzalloc shortcut |
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Add vzalloc for convinience of vmalloc-then-memset-zero case
Use __GFP_ZERO in vzalloc to zero fill the allocated memory.
Signed-off-by: Dave Young <hidave.darkstar@gmail.com> --- include/linux/vmalloc.h | 1 + mm/vmalloc.c | 13 +++++++++++++ 2 files changed, 14 insertions(+)
--- linux-2.6.orig/include/linux/vmalloc.h 2010-08-22 15:31:38.000000000 +0800 +++ linux-2.6/include/linux/vmalloc.h 2010-10-16 10:50:54.739996121 +0800 @@ -53,6 +53,7 @@ static inline void vmalloc_init(void) #endif extern void *vmalloc(unsigned long size); +extern void *vzalloc(unsigned long size); extern void *vmalloc_user(unsigned long size); extern void *vmalloc_node(unsigned long size, int node); extern void *vmalloc_exec(unsigned long size); --- linux-2.6.orig/mm/vmalloc.c 2010-08-22 15:31:39.000000000 +0800 +++ linux-2.6/mm/vmalloc.c 2010-10-16 10:51:57.126665918 +0800 @@ -1604,6 +1604,19 @@ void *vmalloc(unsigned long size) EXPORT_SYMBOL(vmalloc); /** + * vzalloc - allocate virtually contiguous memory with zero filled + * @size: allocation size + * Allocate enough pages to cover @size from the page level + * allocator and map them into contiguous kernel virtual space. + */ +void *vzalloc(unsigned long size) +{ + return __vmalloc_node(size, 1, GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO, + PAGE_KERNEL, -1, __builtin_return_address(0)); +} +EXPORT_SYMBOL(vzalloc); + +/** * vmalloc_user - allocate zeroed virtually contiguous memory for userspace * @size: allocation size *
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