aboutsummaryrefslogtreecommitdiffstats
path: root/include/linux/slab.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/linux/slab.h')
-rw-r--r--include/linux/slab.h129
1 files changed, 129 insertions, 0 deletions
diff --git a/include/linux/slab.h b/include/linux/slab.h
new file mode 100644
index 0000000..3e3c3ab
--- /dev/null
+++ b/include/linux/slab.h
@@ -0,0 +1,129 @@
+/*
+ * 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 *, unsigned int __nocast);
+#ifdef CONFIG_NUMA
+extern void *kmem_cache_alloc_node(kmem_cache_t *, int);
+#else
+static inline void *kmem_cache_alloc_node(kmem_cache_t *cachep, int node)
+{
+ return kmem_cache_alloc(cachep, GFP_KERNEL);
+}
+#endif
+extern void kmem_cache_free(kmem_cache_t *, void *);
+extern unsigned int kmem_cache_size(kmem_cache_t *);
+
+/* 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, unsigned int __nocast);
+
+static inline void *kmalloc(size_t size, unsigned int __nocast 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 *kcalloc(size_t, size_t, unsigned int __nocast);
+extern void kfree(const void *);
+extern unsigned int ksize(const void *);
+
+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 */