dd0fc66fb3
- added typedef unsigned int __nocast gfp_t; - replaced __nocast uses for gfp flags with gfp_t - it gives exactly the same warnings as far as sparse is concerned, doesn't change generated code (from gcc point of view we replaced unsigned int with typedef) and documents what's going on far better. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
152 lines
4.7 KiB
C
152 lines
4.7 KiB
C
/*
|
|
* linux/mm/slab.h
|
|
* Written by Mark Hemment, 1996.
|
|
* (markhe@nextd.demon.co.uk)
|
|
*/
|
|
|
|
#ifndef _LINUX_SLAB_H
|
|
#define _LINUX_SLAB_H
|
|
|
|
#if defined(__KERNEL__)
|
|
|
|
typedef struct kmem_cache_s 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>
|
|
#include <asm/page.h> /* kmalloc_sizes.h needs PAGE_SIZE */
|
|
#include <asm/cache.h> /* kmalloc_sizes.h needs L1_CACHE_BYTES */
|
|
|
|
/* flags for kmem_cache_alloc() */
|
|
#define SLAB_NOFS GFP_NOFS
|
|
#define SLAB_NOIO GFP_NOIO
|
|
#define SLAB_ATOMIC GFP_ATOMIC
|
|
#define SLAB_USER GFP_USER
|
|
#define SLAB_KERNEL GFP_KERNEL
|
|
#define SLAB_DMA GFP_DMA
|
|
|
|
#define SLAB_LEVEL_MASK GFP_LEVEL_MASK
|
|
|
|
#define SLAB_NO_GROW __GFP_NO_GROW /* don't grow a cache */
|
|
|
|
/* flags to pass to kmem_cache_create().
|
|
* The first 3 are only valid when the allocator as been build
|
|
* SLAB_DEBUG_SUPPORT.
|
|
*/
|
|
#define SLAB_DEBUG_FREE 0x00000100UL /* Peform (expensive) checks on free */
|
|
#define SLAB_DEBUG_INITIAL 0x00000200UL /* Call constructor (as verifier) */
|
|
#define SLAB_RED_ZONE 0x00000400UL /* Red zone objs in a cache */
|
|
#define SLAB_POISON 0x00000800UL /* Poison objects */
|
|
#define SLAB_NO_REAP 0x00001000UL /* never reap from the cache */
|
|
#define SLAB_HWCACHE_ALIGN 0x00002000UL /* align objs on a h/w cache lines */
|
|
#define SLAB_CACHE_DMA 0x00004000UL /* use GFP_DMA memory */
|
|
#define SLAB_MUST_HWCACHE_ALIGN 0x00008000UL /* force alignment */
|
|
#define SLAB_STORE_USER 0x00010000UL /* store the last owner for bug hunting */
|
|
#define SLAB_RECLAIM_ACCOUNT 0x00020000UL /* track pages allocated to indicate
|
|
what is reclaimable later*/
|
|
#define SLAB_PANIC 0x00040000UL /* panic if kmem_cache_create() fails */
|
|
#define SLAB_DESTROY_BY_RCU 0x00080000UL /* defer freeing pages to RCU */
|
|
|
|
/* flags passed to a constructor func */
|
|
#define SLAB_CTOR_CONSTRUCTOR 0x001UL /* if not set, then deconstructor */
|
|
#define SLAB_CTOR_ATOMIC 0x002UL /* tell constructor it can't sleep */
|
|
#define SLAB_CTOR_VERIFY 0x004UL /* tell constructor it's a verify call */
|
|
|
|
/* prototypes */
|
|
extern void __init kmem_cache_init(void);
|
|
|
|
extern kmem_cache_t *kmem_cache_create(const char *, size_t, size_t, unsigned long,
|
|
void (*)(void *, kmem_cache_t *, unsigned long),
|
|
void (*)(void *, kmem_cache_t *, unsigned long));
|
|
extern int kmem_cache_destroy(kmem_cache_t *);
|
|
extern int kmem_cache_shrink(kmem_cache_t *);
|
|
extern void *kmem_cache_alloc(kmem_cache_t *, gfp_t);
|
|
extern void kmem_cache_free(kmem_cache_t *, void *);
|
|
extern unsigned int kmem_cache_size(kmem_cache_t *);
|
|
extern const char *kmem_cache_name(kmem_cache_t *);
|
|
extern kmem_cache_t *kmem_find_general_cachep(size_t size, gfp_t gfpflags);
|
|
|
|
/* Size description struct for general caches. */
|
|
struct cache_sizes {
|
|
size_t cs_size;
|
|
kmem_cache_t *cs_cachep;
|
|
kmem_cache_t *cs_dmacachep;
|
|
};
|
|
extern struct cache_sizes malloc_sizes[];
|
|
extern void *__kmalloc(size_t, gfp_t);
|
|
|
|
static inline void *kmalloc(size_t size, gfp_t flags)
|
|
{
|
|
if (__builtin_constant_p(size)) {
|
|
int i = 0;
|
|
#define CACHE(x) \
|
|
if (size <= x) \
|
|
goto found; \
|
|
else \
|
|
i++;
|
|
#include "kmalloc_sizes.h"
|
|
#undef CACHE
|
|
{
|
|
extern void __you_cannot_kmalloc_that_much(void);
|
|
__you_cannot_kmalloc_that_much();
|
|
}
|
|
found:
|
|
return kmem_cache_alloc((flags & GFP_DMA) ?
|
|
malloc_sizes[i].cs_dmacachep :
|
|
malloc_sizes[i].cs_cachep, flags);
|
|
}
|
|
return __kmalloc(size, flags);
|
|
}
|
|
|
|
extern void *kzalloc(size_t, gfp_t);
|
|
|
|
/**
|
|
* kcalloc - allocate memory for an array. The memory is set to zero.
|
|
* @n: number of elements.
|
|
* @size: element size.
|
|
* @flags: the type of memory to allocate.
|
|
*/
|
|
static inline void *kcalloc(size_t n, size_t size, gfp_t flags)
|
|
{
|
|
if (n != 0 && size > INT_MAX / n)
|
|
return NULL;
|
|
return kzalloc(n * size, flags);
|
|
}
|
|
|
|
extern void kfree(const void *);
|
|
extern unsigned int ksize(const void *);
|
|
|
|
#ifdef CONFIG_NUMA
|
|
extern void *kmem_cache_alloc_node(kmem_cache_t *, gfp_t flags, int node);
|
|
extern void *kmalloc_node(size_t size, gfp_t flags, int node);
|
|
#else
|
|
static inline void *kmem_cache_alloc_node(kmem_cache_t *cachep, int flags, int node)
|
|
{
|
|
return kmem_cache_alloc(cachep, flags);
|
|
}
|
|
static inline void *kmalloc_node(size_t size, gfp_t flags, int node)
|
|
{
|
|
return kmalloc(size, flags);
|
|
}
|
|
#endif
|
|
|
|
extern int FASTCALL(kmem_cache_reap(int));
|
|
extern int FASTCALL(kmem_ptr_validate(kmem_cache_t *cachep, void *ptr));
|
|
|
|
/* System wide caches */
|
|
extern kmem_cache_t *vm_area_cachep;
|
|
extern kmem_cache_t *names_cachep;
|
|
extern kmem_cache_t *files_cachep;
|
|
extern kmem_cache_t *filp_cachep;
|
|
extern kmem_cache_t *fs_cachep;
|
|
extern kmem_cache_t *signal_cachep;
|
|
extern kmem_cache_t *sighand_cachep;
|
|
extern kmem_cache_t *bio_cachep;
|
|
|
|
extern atomic_t slab_reclaim_pages;
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* _LINUX_SLAB_H */
|