1 files changed, 37 insertions, 0 deletions

diff --git a/include/linux/mempool.h b/include/linux/mempool.h
new file mode 100644
index 000000000000..4a36edf1c974
--- /dev/null
+++ b/include/linux/mempool.h
@@ -0,0 +1,37 @@
+/*
+ * memory buffer pool support
+ */
+#ifndef _LINUX_MEMPOOL_H
+#define _LINUX_MEMPOOL_H
+
+#include <linux/wait.h>
+
+typedef void * (mempool_alloc_t)(unsigned int __nocast gfp_mask, void *pool_data);
+typedef void (mempool_free_t)(void *element, void *pool_data);
+
+typedef struct mempool_s {
+        spinlock_t lock;
+        int min_nr;             /* nr of elements at *elements */
+        int curr_nr;            /* Current nr of elements at *elements */
+        void **elements;
+
+        void *pool_data;
+        mempool_alloc_t *alloc;
+        mempool_free_t *free;
+        wait_queue_head_t wait;
+} mempool_t;
+extern mempool_t * mempool_create(int min_nr, mempool_alloc_t *alloc_fn,
+                                 mempool_free_t *free_fn, void *pool_data);
+extern int mempool_resize(mempool_t *pool, int new_min_nr, unsigned int __nocast gfp_mask);
+extern void mempool_destroy(mempool_t *pool);
+extern void * mempool_alloc(mempool_t *pool, unsigned int __nocast gfp_mask);
+extern void mempool_free(void *element, mempool_t *pool);
+
+/*
+ * A mempool_alloc_t and mempool_free_t that get the memory from
+ * a slab that is passed in through pool_data.
+ */
+void *mempool_alloc_slab(unsigned int __nocast gfp_mask, void *pool_data);
+void mempool_free_slab(void *element, void *pool_data);
+
+#endif /* _LINUX_MEMPOOL_H */