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Commit 8a13a4cc authored by Christoph Lameter's avatar Christoph Lameter Committed by Pekka Enberg
Browse files

mm/sl[aou]b: Shrink __kmem_cache_create() parameter lists 



Do the initial settings of the fields in common code. This will allow us
to push more processing into common code later and improve readability.

Signed-off-by: default avatarChristoph Lameter <cl@linux.com>
Signed-off-by: default avatarPekka Enberg <penberg@kernel.org>
parent 278b1bb1

mm/slab.c

+33 −40
Original line number Diff line number Diff line
@@ -1677,20 +1677,20 @@ void __init kmem_cache_init(void) 
	 */



	sizes[INDEX_AC].cs_cachep = kmem_cache_zalloc(kmem_cache, GFP_NOWAIT);

	__kmem_cache_create(sizes[INDEX_AC].cs_cachep, names[INDEX_AC].name,

					sizes[INDEX_AC].cs_size,

					ARCH_KMALLOC_MINALIGN,

					ARCH_KMALLOC_FLAGS|SLAB_PANIC,

					NULL);



	sizes[INDEX_AC].cs_cachep->name = names[INDEX_AC].name;

	sizes[INDEX_AC].cs_cachep->size = sizes[INDEX_AC].cs_size;

	sizes[INDEX_AC].cs_cachep->object_size = sizes[INDEX_AC].cs_size;

	sizes[INDEX_AC].cs_cachep->align = ARCH_KMALLOC_MINALIGN;

	__kmem_cache_create(sizes[INDEX_AC].cs_cachep, ARCH_KMALLOC_FLAGS|SLAB_PANIC);

	list_add(&sizes[INDEX_AC].cs_cachep->list, &slab_caches);



	if (INDEX_AC != INDEX_L3) {

		sizes[INDEX_L3].cs_cachep = kmem_cache_zalloc(kmem_cache, GFP_NOWAIT);

		__kmem_cache_create(sizes[INDEX_L3].cs_cachep, names[INDEX_L3].name,

				sizes[INDEX_L3].cs_size,

				ARCH_KMALLOC_MINALIGN,

				ARCH_KMALLOC_FLAGS|SLAB_PANIC,

				NULL);

		sizes[INDEX_L3].cs_cachep->name = names[INDEX_L3].name;

		sizes[INDEX_L3].cs_cachep->size = sizes[INDEX_L3].cs_size;

		sizes[INDEX_L3].cs_cachep->object_size = sizes[INDEX_L3].cs_size;

		sizes[INDEX_L3].cs_cachep->align = ARCH_KMALLOC_MINALIGN;

		__kmem_cache_create(sizes[INDEX_L3].cs_cachep, ARCH_KMALLOC_FLAGS|SLAB_PANIC);

		list_add(&sizes[INDEX_L3].cs_cachep->list, &slab_caches);

	}
@@ -1706,22 +1706,21 @@ void __init kmem_cache_init(void) 
		 */

		if (!sizes->cs_cachep) {

			sizes->cs_cachep = kmem_cache_zalloc(kmem_cache, GFP_NOWAIT);

			__kmem_cache_create(sizes->cs_cachep, names->name,

					sizes->cs_size,

					ARCH_KMALLOC_MINALIGN,

					ARCH_KMALLOC_FLAGS|SLAB_PANIC,

					NULL);

			sizes->cs_cachep->name = names->name;

			sizes->cs_cachep->size = sizes->cs_size;

			sizes->cs_cachep->object_size = sizes->cs_size;

			sizes->cs_cachep->align = ARCH_KMALLOC_MINALIGN;

			__kmem_cache_create(sizes->cs_cachep, ARCH_KMALLOC_FLAGS|SLAB_PANIC);

			list_add(&sizes->cs_cachep->list, &slab_caches);

		}

#ifdef CONFIG_ZONE_DMA

		sizes->cs_dmacachep = kmem_cache_zalloc(kmem_cache, GFP_NOWAIT);

		sizes->cs_dmacachep->name = names->name_dma;

		sizes->cs_dmacachep->size = sizes->cs_size;

		sizes->cs_dmacachep->object_size = sizes->cs_size;

		sizes->cs_dmacachep->align = ARCH_KMALLOC_MINALIGN;

		__kmem_cache_create(sizes->cs_dmacachep,

					names->name_dma,

					sizes->cs_size,

					ARCH_KMALLOC_MINALIGN,

					ARCH_KMALLOC_FLAGS|SLAB_CACHE_DMA|

						SLAB_PANIC,

					NULL);

			       ARCH_KMALLOC_FLAGS|SLAB_CACHE_DMA| SLAB_PANIC);

		list_add(&sizes->cs_dmacachep->list, &slab_caches);

#endif

		sizes++;
@@ -2360,12 +2359,12 @@ static int __init_refok setup_cpu_cache(struct kmem_cache *cachep, gfp_t gfp) 
 * as davem.

 */

int

__kmem_cache_create (struct kmem_cache *cachep, const char *name, size_t size, size_t align,

	unsigned long flags, void (*ctor)(void *))

__kmem_cache_create (struct kmem_cache *cachep, unsigned long flags)

{

	size_t left_over, slab_size, ralign;

	gfp_t gfp;

	int err;

	size_t size = cachep->size;



#if DEBUG

#if FORCED_DEBUG
@@ -2437,8 +2436,8 @@ __kmem_cache_create (struct kmem_cache *cachep, const char *name, size_t size, s 
		ralign = ARCH_SLAB_MINALIGN;

	}

	/* 3) caller mandated alignment */

	if (ralign < align) {

		ralign = align;

	if (ralign < cachep->align) {

		ralign = cachep->align;

	}

	/* disable debug if necessary */

	if (ralign > __alignof__(unsigned long long))
@@ -2446,7 +2445,7 @@ __kmem_cache_create (struct kmem_cache *cachep, const char *name, size_t size, s 
	/*

	 * 4) Store it.

	 */

	align = ralign;

	cachep->align = ralign;



	if (slab_is_available())

		gfp = GFP_KERNEL;
@@ -2454,8 +2453,6 @@ __kmem_cache_create (struct kmem_cache *cachep, const char *name, size_t size, s 
		gfp = GFP_NOWAIT;



	cachep->nodelists = (struct kmem_list3 **)&cachep->array[nr_cpu_ids];

	cachep->object_size = size;

	cachep->align = align;

#if DEBUG



	/*
@@ -2500,17 +2497,15 @@ __kmem_cache_create (struct kmem_cache *cachep, const char *name, size_t size, s 
		 */

		flags |= CFLGS_OFF_SLAB;



	size = ALIGN(size, align);

	size = ALIGN(size, cachep->align);



	left_over = calculate_slab_order(cachep, size, align, flags);

	left_over = calculate_slab_order(cachep, size, cachep->align, flags);



	if (!cachep->num) {

		printk(KERN_ERR

		       "kmem_cache_create: couldn't create cache %s.\n", name);

	if (!cachep->num)

		return -E2BIG;

	}



	slab_size = ALIGN(cachep->num * sizeof(kmem_bufctl_t)

			  + sizeof(struct slab), align);

			  + sizeof(struct slab), cachep->align);



	/*

	 * If the slab has been placed off-slab, and we have enough space then
@@ -2538,8 +2533,8 @@ __kmem_cache_create (struct kmem_cache *cachep, const char *name, size_t size, s 


	cachep->colour_off = cache_line_size();

	/* Offset must be a multiple of the alignment. */

	if (cachep->colour_off < align)

		cachep->colour_off = align;

	if (cachep->colour_off < cachep->align)

		cachep->colour_off = cachep->align;

	cachep->colour = left_over / cachep->colour_off;

	cachep->slab_size = slab_size;

	cachep->flags = flags;
@@ -2560,8 +2555,6 @@ __kmem_cache_create (struct kmem_cache *cachep, const char *name, size_t size, s 
		 */

		BUG_ON(ZERO_OR_NULL_PTR(cachep->slabp_cache));

	}

	cachep->ctor = ctor;

	cachep->name = name;

	cachep->refcount = 1;



	err = setup_cpu_cache(cachep, gfp);

mm/slab.h

+1 −2
Original line number Diff line number Diff line
@@ -33,8 +33,7 @@ extern struct list_head slab_caches; 
extern struct kmem_cache *kmem_cache;



/* Functions provided by the slab allocators */

extern int __kmem_cache_create(struct kmem_cache *, const char *name,

	size_t size, size_t align, unsigned long flags, void (*ctor)(void *));

extern int __kmem_cache_create(struct kmem_cache *, unsigned long flags);



#ifdef CONFIG_SLUB

struct kmem_cache *__kmem_cache_alias(const char *name, size_t size,

mm/slab_common.c

+13 −13
Original line number Diff line number Diff line
@@ -100,7 +100,6 @@ struct kmem_cache *kmem_cache_create(const char *name, size_t size, size_t align 
{

	struct kmem_cache *s = NULL;

	int err = 0;

	char *n;



	get_online_cpus();

	mutex_lock(&slab_mutex);
@@ -109,32 +108,33 @@ struct kmem_cache *kmem_cache_create(const char *name, size_t size, size_t align 
		goto out_locked;





	n = kstrdup(name, GFP_KERNEL);

	if (!n) {

		err = -ENOMEM;

		goto out_locked;

	}



	s = __kmem_cache_alias(name, size, align, flags, ctor);

	if (s)

		goto out_locked;



	s = kmem_cache_zalloc(kmem_cache, GFP_KERNEL);

	if (s) {

		err = __kmem_cache_create(s, n, size, align, flags, ctor);

		s->object_size = s->size = size;

		s->align = align;

		s->ctor = ctor;

		s->name = kstrdup(name, GFP_KERNEL);

		if (!s->name) {

			kmem_cache_free(kmem_cache, s);

			err = -ENOMEM;

			goto out_locked;

		}



		err = __kmem_cache_create(s, flags);

		if (!err)



			list_add(&s->list, &slab_caches);



		else {

			kfree(n);

			kfree(s->name);

			kmem_cache_free(kmem_cache, s);

		}



	} else {

		kfree(n);

	} else

		err = -ENOMEM;

	}



out_locked:

	mutex_unlock(&slab_mutex);

mm/slob.c

+3 −5
Original line number Diff line number Diff line
@@ -508,17 +508,15 @@ size_t ksize(const void *block) 
}

EXPORT_SYMBOL(ksize);



int __kmem_cache_create(struct kmem_cache *c, const char *name, size_t size,

	size_t align, unsigned long flags, void (*ctor)(void *))

int __kmem_cache_create(struct kmem_cache *c, unsigned long flags)

{

	c->name = name;

	c->size = size;

	size_t align = c->size;



	if (flags & SLAB_DESTROY_BY_RCU) {

		/* leave room for rcu footer at the end of object */

		c->size += sizeof(struct slob_rcu);

	}

	c->flags = flags;

	c->ctor = ctor;

	/* ignore alignment unless it's forced */

	c->align = (flags & SLAB_HWCACHE_ALIGN) ? SLOB_ALIGN : 0;

	if (c->align < ARCH_SLAB_MINALIGN)

mm/slub.c

+18 −21
Original line number Diff line number Diff line
@@ -3029,16 +3029,9 @@ static int calculate_sizes(struct kmem_cache *s, int forced_order) 


}



static int kmem_cache_open(struct kmem_cache *s,

		const char *name, size_t size,

		size_t align, unsigned long flags,

		void (*ctor)(void *))

static int kmem_cache_open(struct kmem_cache *s, unsigned long flags)

{

	s->name = name;

	s->ctor = ctor;

	s->object_size = size;

	s->align = align;

	s->flags = kmem_cache_flags(size, flags, name, ctor);

	s->flags = kmem_cache_flags(s->size, flags, s->name, s->ctor);

	s->reserved = 0;



	if (need_reserve_slab_rcu && (s->flags & SLAB_DESTROY_BY_RCU))
@@ -3115,7 +3108,7 @@ error: 
	if (flags & SLAB_PANIC)

		panic("Cannot create slab %s size=%lu realsize=%u "

			"order=%u offset=%u flags=%lx\n",

			s->name, (unsigned long)size, s->size, oo_order(s->oo),

			s->name, (unsigned long)s->size, s->size, oo_order(s->oo),

			s->offset, flags);

	return -EINVAL;

}
@@ -3261,12 +3254,15 @@ static struct kmem_cache *__init create_kmalloc_cache(const char *name, 


	s = kmem_cache_zalloc(kmem_cache, GFP_NOWAIT);



	s->name = name;

	s->size = s->object_size = size;

	s->align = ARCH_KMALLOC_MINALIGN;



	/*

	 * This function is called with IRQs disabled during early-boot on

	 * single CPU so there's no need to take slab_mutex here.

	 */

	if (kmem_cache_open(s, name, size, ARCH_KMALLOC_MINALIGN,

								flags, NULL))

	if (kmem_cache_open(s, flags))

		goto panic;



	list_add(&s->list, &slab_caches);
@@ -3719,9 +3715,10 @@ void __init kmem_cache_init(void) 
	 */

	kmem_cache_node = (void *)kmem_cache + kmalloc_size;



	kmem_cache_open(kmem_cache_node, "kmem_cache_node",

		sizeof(struct kmem_cache_node),

		0, SLAB_HWCACHE_ALIGN | SLAB_PANIC, NULL);

	kmem_cache_node->name = "kmem_cache_node";

	kmem_cache_node->size = kmem_cache_node->object_size =

		sizeof(struct kmem_cache_node);

	kmem_cache_open(kmem_cache_node, SLAB_HWCACHE_ALIGN | SLAB_PANIC);



	hotplug_memory_notifier(slab_memory_callback, SLAB_CALLBACK_PRI);
@@ -3729,8 +3726,10 @@ void __init kmem_cache_init(void) 
	slab_state = PARTIAL;



	temp_kmem_cache = kmem_cache;

	kmem_cache_open(kmem_cache, "kmem_cache", kmem_size,

		0, SLAB_HWCACHE_ALIGN | SLAB_PANIC, NULL);

	kmem_cache->name = "kmem_cache";

	kmem_cache->size = kmem_cache->object_size = kmem_size;

	kmem_cache_open(kmem_cache, SLAB_HWCACHE_ALIGN | SLAB_PANIC);



	kmem_cache = kmem_cache_alloc(kmem_cache, GFP_NOWAIT);

	memcpy(kmem_cache, temp_kmem_cache, kmem_size);
@@ -3943,11 +3942,9 @@ struct kmem_cache *__kmem_cache_alias(const char *name, size_t size, 
	return s;

}



int __kmem_cache_create(struct kmem_cache *s,

		const char *name, size_t size,

		size_t align, unsigned long flags, void (*ctor)(void *))

int __kmem_cache_create(struct kmem_cache *s, unsigned long flags)

{

	return kmem_cache_open(s, name, size, align, flags, ctor);

	return kmem_cache_open(s, flags);

}



#ifdef CONFIG_SMP