plain text document attachment (mempool-add_page_allocator.patch)
From: Matthew Dobson <[email protected]>
Subject: [patch 1/6] mempool - Add page allocator
Add an allocator to the common mempool code: a simple page allocator
This will be used by the next patch in the series to replace duplicate
mempool-backed page allocators in 2 places in the kernel. It is also
likely that there will be more users in the future.
Signed-off-by: Matthew Dobson <[email protected]>
include/linux/mempool.h | 7 +++++++
mm/mempool.c | 18 ++++++++++++++++++
2 files changed, 25 insertions(+)
Index: linux-2.6.16-rc1-mm3+mempool_work/mm/mempool.c
===================================================================
--- linux-2.6.16-rc1-mm3+mempool_work.orig/mm/mempool.c
+++ linux-2.6.16-rc1-mm3+mempool_work/mm/mempool.c
@@ -289,3 +289,21 @@ void mempool_free_slab(void *element, vo
kmem_cache_free(mem, element);
}
EXPORT_SYMBOL(mempool_free_slab);
+
+/*
+ * A simple mempool-backed page allocator that allocates pages
+ * of the order specified by pool_data.
+ */
+void *mempool_alloc_pages(gfp_t gfp_mask, void *pool_data)
+{
+ int order = (int) pool_data;
+ return alloc_pages(gfp_mask, order);
+}
+EXPORT_SYMBOL(mempool_alloc_pages);
+
+void mempool_free_pages(void *element, void *pool_data)
+{
+ int order = (int) pool_data;
+ __free_pages(element, order);
+}
+EXPORT_SYMBOL(mempool_free_pages);
Index: linux-2.6.16-rc1-mm3+mempool_work/include/linux/mempool.h
===================================================================
--- linux-2.6.16-rc1-mm3+mempool_work.orig/include/linux/mempool.h
+++ linux-2.6.16-rc1-mm3+mempool_work/include/linux/mempool.h
@@ -38,4 +38,11 @@ extern void mempool_free(void *element,
void *mempool_alloc_slab(gfp_t gfp_mask, void *pool_data);
void mempool_free_slab(void *element, void *pool_data);
+/*
+ * A mempool_alloc_t and mempool_free_t for a simple page allocator that
+ * allocates pages of the order specified by pool_data
+ */
+void *mempool_alloc_pages(gfp_t gfp_mask, void *pool_data);
+void mempool_free_pages(void *element, void *pool_data);
+
#endif /* _LINUX_MEMPOOL_H */
--