[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / slab_def.h

#ifndef _LINUX_SLAB_DEF_H
#define	_LINUX_SLAB_DEF_H

/*
 * Definitions unique to the original Linux SLAB allocator.
 *
 * What we provide here is a way to optimize the frequent kmalloc
 * calls in the kernel by selecting the appropriate general cache
 * if kmalloc was called with a size that can be established at
 * compile time.
 */

#include <linux/init.h>
#include <asm/page.h>		/* kmalloc_sizes.h needs PAGE_SIZE */
#include <asm/cache.h>		/* kmalloc_sizes.h needs L1_CACHE_BYTES */
#include <linux/compiler.h>

/* Size description struct for general caches. */
struct cache_sizes {
	size_t		 	cs_size;
	struct kmem_cache	*cs_cachep;
#ifdef CONFIG_ZONE_DMA
	struct kmem_cache	*cs_dmacachep;
#endif
};
extern struct cache_sizes malloc_sizes[];

void *kmem_cache_alloc(struct kmem_cache *, gfp_t);
void *__kmalloc(size_t size, gfp_t flags);

static inline void *kmalloc(size_t size, gfp_t flags)
{
	if (__builtin_constant_p(size)) {
		int i = 0;

		if (!size)
			return ZERO_SIZE_PTR;

#define CACHE(x) \
		if (size <= x) \
			goto found; \
		else \
			i++;
#include <linux/kmalloc_sizes.h>
#undef CACHE
		return NULL;
found:
#ifdef CONFIG_ZONE_DMA
		if (flags & GFP_DMA)
			return kmem_cache_alloc(malloc_sizes[i].cs_dmacachep,
						flags);
#endif
		return kmem_cache_alloc(malloc_sizes[i].cs_cachep, flags);
	}
	return __kmalloc(size, flags);
}

#ifdef CONFIG_NUMA
extern void *__kmalloc_node(size_t size, gfp_t flags, int node);
extern void *kmem_cache_alloc_node(struct kmem_cache *, gfp_t flags, int node);

static inline void *kmalloc_node(size_t size, gfp_t flags, int node)
{
	if (__builtin_constant_p(size)) {
		int i = 0;

		if (!size)
			return ZERO_SIZE_PTR;

#define CACHE(x) \
		if (size <= x) \
			goto found; \
		else \
			i++;
#include <linux/kmalloc_sizes.h>
#undef CACHE
		return NULL;
found:
#ifdef CONFIG_ZONE_DMA
		if (flags & GFP_DMA)
			return kmem_cache_alloc_node(malloc_sizes[i].cs_dmacachep,
						flags, node);
#endif
		return kmem_cache_alloc_node(malloc_sizes[i].cs_cachep,
						flags, node);
	}
	return __kmalloc_node(size, flags, node);
}

#endif	/* CONFIG_NUMA */

#endif	/* _LINUX_SLAB_DEF_H */
Commit	Line	Data
2e892f43 CL	1	#ifndef _LINUX_SLAB_DEF_H
	2	#define _LINUX_SLAB_DEF_H
	3
	4	/*
	5	* Definitions unique to the original Linux SLAB allocator.
	6	*
	7	* What we provide here is a way to optimize the frequent kmalloc
	8	* calls in the kernel by selecting the appropriate general cache
	9	* if kmalloc was called with a size that can be established at
	10	* compile time.
	11	*/
	12
	13	#include <linux/init.h>
	14	#include <asm/page.h> /* kmalloc_sizes.h needs PAGE_SIZE */
	15	#include <asm/cache.h> /* kmalloc_sizes.h needs L1_CACHE_BYTES */
	16	#include <linux/compiler.h>
	17
	18	/* Size description struct for general caches. */
	19	struct cache_sizes {
	20	size_t cs_size;
	21	struct kmem_cache *cs_cachep;
4b51d669	22	#ifdef CONFIG_ZONE_DMA
2e892f43	23	struct kmem_cache *cs_dmacachep;
4b51d669	24	#endif
2e892f43 CL	25	};
	26	extern struct cache_sizes malloc_sizes[];
	27
6193a2ff PM	28	void kmem_cache_alloc(struct kmem_cache , gfp_t);
	29	void *__kmalloc(size_t size, gfp_t flags);
	30
2e892f43 CL	31	static inline void *kmalloc(size_t size, gfp_t flags)
	32	{
	33	if (__builtin_constant_p(size)) {
	34	int i = 0;
6cb8f913 CL	35
	36	if (!size)
	37	return ZERO_SIZE_PTR;
	38
2e892f43 CL	39	#define CACHE(x) \
	40	if (size <= x) \
	41	goto found; \
	42	else \
	43	i++;
1c61fc40	44	#include <linux/kmalloc_sizes.h>
2e892f43	45	#undef CACHE
1cf3eb2f	46	return NULL;
2e892f43	47	found:
4b51d669 CL	48	#ifdef CONFIG_ZONE_DMA
	49	if (flags & GFP_DMA)
	50	return kmem_cache_alloc(malloc_sizes[i].cs_dmacachep,
	51	flags);
	52	#endif
	53	return kmem_cache_alloc(malloc_sizes[i].cs_cachep, flags);
2e892f43 CL	54	}
	55	return __kmalloc(size, flags);
	56	}
	57
2e892f43 CL	58	#ifdef CONFIG_NUMA
2e892f43 CL	59	extern void *__kmalloc_node(size_t size, gfp_t flags, int node);
6193a2ff	60	extern void kmem_cache_alloc_node(struct kmem_cache , gfp_t flags, int node);
2e892f43 CL	61
	62	static inline void *kmalloc_node(size_t size, gfp_t flags, int node)
	63	{
	64	if (__builtin_constant_p(size)) {
	65	int i = 0;
6cb8f913 CL	66
	67	if (!size)
	68	return ZERO_SIZE_PTR;
	69
2e892f43 CL	70	#define CACHE(x) \
	71	if (size <= x) \
	72	goto found; \
	73	else \
	74	i++;
1c61fc40	75	#include <linux/kmalloc_sizes.h>
2e892f43	76	#undef CACHE
1cf3eb2f	77	return NULL;
2e892f43	78	found:
4b51d669 CL	79	#ifdef CONFIG_ZONE_DMA
	80	if (flags & GFP_DMA)
	81	return kmem_cache_alloc_node(malloc_sizes[i].cs_dmacachep,
	82	flags, node);
	83	#endif
	84	return kmem_cache_alloc_node(malloc_sizes[i].cs_cachep,
	85	flags, node);
2e892f43 CL	86	}
	87	return __kmalloc_node(size, flags, node);
	88	}
	89
	90	#endif /* CONFIG_NUMA */
	91
	92	#endif /* _LINUX_SLAB_DEF_H */