diff options
Diffstat (limited to 'include/linux/slab.h')
| -rw-r--r-- | include/linux/slab.h | 51 |
1 files changed, 50 insertions, 1 deletions
diff --git a/include/linux/slab.h b/include/linux/slab.h index 2d985d59c7b..45ad55b70d1 100644 --- a/include/linux/slab.h +++ b/include/linux/slab.h @@ -11,7 +11,6 @@ typedef struct kmem_cache kmem_cache_t; -#include <linux/config.h> /* kmalloc_sizes.h needs CONFIG_ options */ #include <linux/gfp.h> #include <linux/init.h> #include <linux/types.h> @@ -87,6 +86,51 @@ extern void *__kmalloc_track_caller(size_t, gfp_t, void*); __kmalloc_track_caller(size, flags, __builtin_return_address(0)) #endif +/** + * kmalloc - allocate memory + * @size: how many bytes of memory are required. + * @flags: the type of memory to allocate. + * + * kmalloc is the normal method of allocating memory + * in the kernel. + * + * The @flags argument may be one of: + * + * %GFP_USER - Allocate memory on behalf of user. May sleep. + * + * %GFP_KERNEL - Allocate normal kernel ram. May sleep. + * + * %GFP_ATOMIC - Allocation will not sleep. + * For example, use this inside interrupt handlers. + * + * %GFP_HIGHUSER - Allocate pages from high memory. + * + * %GFP_NOIO - Do not do any I/O at all while trying to get memory. + * + * %GFP_NOFS - Do not make any fs calls while trying to get memory. + * + * Also it is possible to set different flags by OR'ing + * in one or more of the following additional @flags: + * + * %__GFP_COLD - Request cache-cold pages instead of + * trying to return cache-warm pages. + * + * %__GFP_DMA - Request memory from the DMA-capable zone. + * + * %__GFP_HIGH - This allocation has high priority and may use emergency pools. + * + * %__GFP_HIGHMEM - Allocated memory may be from highmem. + * + * %__GFP_NOFAIL - Indicate that this allocation is in no way allowed to fail + * (think twice before using). + * + * %__GFP_NORETRY - If memory is not immediately available, + * then give up at once. + * + * %__GFP_NOWARN - If allocation fails, don't issue any warnings. + * + * %__GFP_REPEAT - If allocation fails initially, try once more before failing. + */ static inline void *kmalloc(size_t size, gfp_t flags) { if (__builtin_constant_p(size)) { @@ -112,6 +156,11 @@ found: extern void *__kzalloc(size_t, gfp_t); +/** + * kzalloc - allocate memory. The memory is set to zero. + * @size: how many bytes of memory are required. + * @flags: the type of memory to allocate (see kmalloc). + */ static inline void *kzalloc(size_t size, gfp_t flags) { if (__builtin_constant_p(size)) { |