de1af8f62a
IDR needs more functionality from the kernel: kmalloc()/kfree(), and xchg(). Link: http://lkml.kernel.org/r/1480369871-5271-67-git-send-email-mawilcox@linuxonhyperv.com Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Tested-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Konstantin Khlebnikov <koct9i@gmail.com> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Cc: Matthew Wilcox <mawilcox@microsoft.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
82 lines
1.4 KiB
C
82 lines
1.4 KiB
C
#include <stdlib.h>
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#include <string.h>
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#include <malloc.h>
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#include <unistd.h>
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#include <assert.h>
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#include <linux/mempool.h>
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#include <linux/slab.h>
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#include <urcu/uatomic.h>
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int nr_allocated;
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int preempt_count;
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void *mempool_alloc(mempool_t *pool, int gfp_mask)
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{
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return pool->alloc(gfp_mask, pool->data);
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}
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void mempool_free(void *element, mempool_t *pool)
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{
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pool->free(element, pool->data);
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}
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mempool_t *mempool_create(int min_nr, mempool_alloc_t *alloc_fn,
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mempool_free_t *free_fn, void *pool_data)
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{
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mempool_t *ret = malloc(sizeof(*ret));
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ret->alloc = alloc_fn;
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ret->free = free_fn;
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ret->data = pool_data;
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return ret;
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}
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void *kmem_cache_alloc(struct kmem_cache *cachep, int flags)
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{
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void *ret;
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if (flags & __GFP_NOWARN)
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return NULL;
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ret = malloc(cachep->size);
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if (cachep->ctor)
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cachep->ctor(ret);
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uatomic_inc(&nr_allocated);
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return ret;
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}
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void kmem_cache_free(struct kmem_cache *cachep, void *objp)
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{
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assert(objp);
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uatomic_dec(&nr_allocated);
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memset(objp, 0, cachep->size);
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free(objp);
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}
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void *kmalloc(size_t size, gfp_t gfp)
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{
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void *ret = malloc(size);
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uatomic_inc(&nr_allocated);
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return ret;
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}
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void kfree(void *p)
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{
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if (!p)
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return;
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uatomic_dec(&nr_allocated);
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free(p);
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}
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struct kmem_cache *
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kmem_cache_create(const char *name, size_t size, size_t offset,
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unsigned long flags, void (*ctor)(void *))
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{
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struct kmem_cache *ret = malloc(sizeof(*ret));
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ret->size = size;
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ret->ctor = ctor;
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return ret;
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}
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