plain text document attachment (mempool-add_kmalloc_allocator.patch)
Add another allocator to the common mempool code: a kmalloc/kfree allocator
This will be used by the next patch in the series to replace duplicate
mempool-backed kmalloc allocators in several places in the kernel.
It is also very likely that there will be more users in the future.
Signed-off-by: Matthew Dobson <[email protected]>
include/linux/mempool.h | 12 ++++++++++++
mm/mempool.c | 17 +++++++++++++++++
2 files changed, 29 insertions(+)
Index: linux-2.6.16-rc1-mm4+mempool_work/include/linux/mempool.h
===================================================================
--- linux-2.6.16-rc1-mm4+mempool_work.orig/include/linux/mempool.h
+++ linux-2.6.16-rc1-mm4+mempool_work/include/linux/mempool.h
@@ -39,6 +39,18 @@ void *mempool_alloc_slab(gfp_t gfp_mask,
void mempool_free_slab(void *element, void *pool_data);
/*
+ * A mempool_alloc_t and mempool_free_t to kmalloc the amount of memory
+ * specified by pool_data
+ */
+void *mempool_kmalloc(gfp_t gfp_mask, void *pool_data);
+void mempool_kfree(void *element, void *pool_data);
+static inline mempool_t *mempool_create_kmalloc_pool(int min_nr, size_t size)
+{
+ return mempool_create(min_nr, mempool_kmalloc, mempool_kfree,
+ (void *) size);
+}
+
+/*
* A mempool_alloc_t and mempool_free_t for a simple page allocator that
* allocates pages of the order specified by pool_data
*/
Index: linux-2.6.16-rc1-mm4+mempool_work/mm/mempool.c
===================================================================
--- linux-2.6.16-rc1-mm4+mempool_work.orig/mm/mempool.c
+++ linux-2.6.16-rc1-mm4+mempool_work/mm/mempool.c
@@ -291,6 +291,23 @@ void mempool_free_slab(void *element, vo
EXPORT_SYMBOL(mempool_free_slab);
/*
+ * A commonly used alloc and free fn that kmalloc/kfrees the amount of memory
+ * specfied by pool_data
+ */
+void *mempool_kmalloc(gfp_t gfp_mask, void *pool_data)
+{
+ size_t size = (size_t) pool_data;
+ return kmalloc(size, gfp_mask);
+}
+EXPORT_SYMBOL(mempool_kmalloc);
+
+void mempool_kfree(void *element, void *pool_data)
+{
+ kfree(element);
+}
+EXPORT_SYMBOL(mempool_kfree);
+
+/*
* A simple mempool-backed page allocator that allocates pages
* of the order specified by pool_data.
*/
--