commit eada35efcb2773cf49aa26277e056122e1a3405c
author Pekka Enberg <penberg@cs.helsinki.fi> Mon Feb 11 22:47:46 2008 +0200
committer Christoph Lameter <christoph@stapp.engr.sgi.com> Thu Feb 14 15:30:01 2008 -0800
tree 69803b03b6f6106722d4cc293678f2e3183bec2e
parent e51bfd0ad10600a9fe4c8ede5ac2272e80075008

slub: kmalloc page allocator pass-through cleanup

This adds a proper function for kmalloc page allocator pass-through. While it
simplifies any code that does slab tracing code a lot, I think it's a
worthwhile cleanup in itself.

Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Christoph Lameter <clameter@sgi.com>

include/linux/slub_def.h

diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h
index 5e6d3d6..a849c47 100644
--- a/include/linux/slub_def.h
+++ b/include/linux/slub_def.h
@@ -188,12 +188,16 @@
 void *kmem_cache_alloc(struct kmem_cache *, gfp_t);
 void *__kmalloc(size_t size, gfp_t flags);
 
+static __always_inline void *kmalloc_large(size_t size, gfp_t flags)
+{
+	return (void *)__get_free_pages(flags | __GFP_COMP, get_order(size));
+}
+
 static __always_inline void *kmalloc(size_t size, gfp_t flags)
 {
 	if (__builtin_constant_p(size)) {
 		if (size > PAGE_SIZE / 2)
-			return (void *)__get_free_pages(flags | __GFP_COMP,
-							get_order(size));
+			return kmalloc_large(size, flags);
 
 		if (!(flags & SLUB_DMA)) {
 			struct kmem_cache *s = kmalloc_slab(size);

mm/slub.c

diff --git a/mm/slub.c b/mm/slub.c
index e2989ae..7870ef9 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2671,8 +2671,7 @@
 	struct kmem_cache *s;
 
 	if (unlikely(size > PAGE_SIZE / 2))
-		return (void *)__get_free_pages(flags | __GFP_COMP,
-							get_order(size));
+		return kmalloc_large(size, flags);
 
 	s = get_slab(size, flags);
 
@@ -2689,8 +2688,7 @@
 	struct kmem_cache *s;
 
 	if (unlikely(size > PAGE_SIZE / 2))
-		return (void *)__get_free_pages(flags | __GFP_COMP,
-							get_order(size));
+		return kmalloc_large(size, flags);
 
 	s = get_slab(size, flags);
 
@@ -3219,8 +3217,8 @@
 	struct kmem_cache *s;
 
 	if (unlikely(size > PAGE_SIZE / 2))
-		return (void *)__get_free_pages(gfpflags | __GFP_COMP,
-							get_order(size));
+		return kmalloc_large(size, gfpflags);
+
 	s = get_slab(size, gfpflags);
 
 	if (unlikely(ZERO_OR_NULL_PTR(s)))
@@ -3235,8 +3233,8 @@
 	struct kmem_cache *s;
 
 	if (unlikely(size > PAGE_SIZE / 2))
-		return (void *)__get_free_pages(gfpflags | __GFP_COMP,
-							get_order(size));
+		return kmalloc_large(size, gfpflags);
+
 	s = get_slab(size, gfpflags);
 
 	if (unlikely(ZERO_OR_NULL_PTR(s)))