Gitiles
Code Review Sign In
gerrit-public.fairphone.software / kernel / msm-4.9 / 55645e9b0ae202f9bd58e68eb141d7594163935f / . / include / linux / slab.h
blob: 3e3c3ab8ff94140710b8b882e8f458da98eae0ab [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1/*
2 * linux/mm/slab.h
3 * Written by Mark Hemment, 1996.
4 * (markhe@nextd.demon.co.uk)
5 */
6
7#ifndef _LINUX_SLAB_H
8#define _LINUX_SLAB_H
9
10#if defined(__KERNEL__)
11
12typedef struct kmem_cache_s kmem_cache_t;
13
14#include <linux/config.h> /* kmalloc_sizes.h needs CONFIG_ options */
15#include <linux/gfp.h>
16#include <linux/init.h>
17#include <linux/types.h>
18#include <asm/page.h> /* kmalloc_sizes.h needs PAGE_SIZE */
19#include <asm/cache.h> /* kmalloc_sizes.h needs L1_CACHE_BYTES */
20
21/* flags for kmem_cache_alloc() */
22#define SLAB_NOFS GFP_NOFS
23#define SLAB_NOIO GFP_NOIO
24#define SLAB_ATOMIC GFP_ATOMIC
25#define SLAB_USER GFP_USER
26#define SLAB_KERNEL GFP_KERNEL
27#define SLAB_DMA GFP_DMA
28
29#define SLAB_LEVEL_MASK GFP_LEVEL_MASK
30
31#define SLAB_NO_GROW __GFP_NO_GROW /* don't grow a cache */
32
33/* flags to pass to kmem_cache_create().
34 * The first 3 are only valid when the allocator as been build
35 * SLAB_DEBUG_SUPPORT.
36 */
37#define SLAB_DEBUG_FREE 0x00000100UL /* Peform (expensive) checks on free */
38#define SLAB_DEBUG_INITIAL 0x00000200UL /* Call constructor (as verifier) */
39#define SLAB_RED_ZONE 0x00000400UL /* Red zone objs in a cache */
40#define SLAB_POISON 0x00000800UL /* Poison objects */
41#define SLAB_NO_REAP 0x00001000UL /* never reap from the cache */
42#define SLAB_HWCACHE_ALIGN 0x00002000UL /* align objs on a h/w cache lines */
43#define SLAB_CACHE_DMA 0x00004000UL /* use GFP_DMA memory */
44#define SLAB_MUST_HWCACHE_ALIGN 0x00008000UL /* force alignment */
45#define SLAB_STORE_USER 0x00010000UL /* store the last owner for bug hunting */
46#define SLAB_RECLAIM_ACCOUNT 0x00020000UL /* track pages allocated to indicate
47 what is reclaimable later*/
48#define SLAB_PANIC 0x00040000UL /* panic if kmem_cache_create() fails */
49#define SLAB_DESTROY_BY_RCU 0x00080000UL /* defer freeing pages to RCU */
50
51/* flags passed to a constructor func */
52#define SLAB_CTOR_CONSTRUCTOR 0x001UL /* if not set, then deconstructor */
53#define SLAB_CTOR_ATOMIC 0x002UL /* tell constructor it can't sleep */
54#define SLAB_CTOR_VERIFY 0x004UL /* tell constructor it's a verify call */
55
56/* prototypes */
57extern void __init kmem_cache_init(void);
58
59extern kmem_cache_t *kmem_cache_create(const char *, size_t, size_t, unsigned long,
60 void (*)(void *, kmem_cache_t *, unsigned long),
61 void (*)(void *, kmem_cache_t *, unsigned long));
62extern int kmem_cache_destroy(kmem_cache_t *);
63extern int kmem_cache_shrink(kmem_cache_t *);
64extern void *kmem_cache_alloc(kmem_cache_t *, unsigned int __nocast);
65#ifdef CONFIG_NUMA
66extern void *kmem_cache_alloc_node(kmem_cache_t *, int);
67#else
68static inline void *kmem_cache_alloc_node(kmem_cache_t *cachep, int node)
69{
70 return kmem_cache_alloc(cachep, GFP_KERNEL);
71}
72#endif
73extern void kmem_cache_free(kmem_cache_t *, void *);
74extern unsigned int kmem_cache_size(kmem_cache_t *);
75
76/* Size description struct for general caches. */
77struct cache_sizes {
78 size_t cs_size;
79 kmem_cache_t *cs_cachep;
80 kmem_cache_t *cs_dmacachep;
81};
82extern struct cache_sizes malloc_sizes[];
83extern void *__kmalloc(size_t, unsigned int __nocast);
84
85static inline void *kmalloc(size_t size, unsigned int __nocast flags)
86{
87 if (__builtin_constant_p(size)) {
88 int i = 0;
89#define CACHE(x) \
90 if (size <= x) \
91 goto found; \
92 else \
93 i++;
94#include "kmalloc_sizes.h"
95#undef CACHE
96 {
97 extern void __you_cannot_kmalloc_that_much(void);
98 __you_cannot_kmalloc_that_much();
99 }
100found:
101 return kmem_cache_alloc((flags & GFP_DMA) ?
102 malloc_sizes[i].cs_dmacachep :
103 malloc_sizes[i].cs_cachep, flags);
104 }
105 return __kmalloc(size, flags);
106}
107
108extern void *kcalloc(size_t, size_t, unsigned int __nocast);
109extern void kfree(const void *);
110extern unsigned int ksize(const void *);
111
112extern int FASTCALL(kmem_cache_reap(int));
113extern int FASTCALL(kmem_ptr_validate(kmem_cache_t *cachep, void *ptr));
114
115/* System wide caches */
116extern kmem_cache_t *vm_area_cachep;
117extern kmem_cache_t *names_cachep;
118extern kmem_cache_t *files_cachep;
119extern kmem_cache_t *filp_cachep;
120extern kmem_cache_t *fs_cachep;
121extern kmem_cache_t *signal_cachep;
122extern kmem_cache_t *sighand_cachep;
123extern kmem_cache_t *bio_cachep;
124
125extern atomic_t slab_reclaim_pages;
126
127#endif /* __KERNEL__ */
128
129#endif /* _LINUX_SLAB_H */