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authorCatalin Marinas <catalin.marinas@arm.com>2009-06-17 18:29:02 +0100
committerCatalin Marinas <catalin.marinas@arm.com>2009-06-17 18:29:02 +0100
commit216c04b0d848fa3db04fc240d9cdc1d2cc1e9574 (patch)
tree9c560c0f70ee43accca93a47ce64313d67e73b2a
parent65795efbd380a832ae508b04dba8f8e53f0b84d9 (diff)
downloadop-kernel-dev-216c04b0d848fa3db04fc240d9cdc1d2cc1e9574.zip
op-kernel-dev-216c04b0d848fa3db04fc240d9cdc1d2cc1e9574.tar.gz
kmemleak: Only use GFP_KERNEL|GFP_ATOMIC for the internal allocations
Kmemleak allocates memory for pointer tracking and it tries to avoid using GFP_ATOMIC if the caller doesn't require it. However other gfp flags may be passed by the caller which aren't required by kmemleak. This patch filters the gfp flags so that only GFP_KERNEL | GFP_ATOMIC are used. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
-rw-r--r--mm/kmemleak.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/mm/kmemleak.c b/mm/kmemleak.c
index 58ec86c..25e2034 100644
--- a/mm/kmemleak.c
+++ b/mm/kmemleak.c
@@ -109,6 +109,9 @@
#define BYTES_PER_POINTER sizeof(void *)
+/* GFP bitmask for kmemleak internal allocations */
+#define GFP_KMEMLEAK_MASK (GFP_KERNEL | GFP_ATOMIC)
+
/* scanning area inside a memory block */
struct kmemleak_scan_area {
struct hlist_node node;
@@ -462,7 +465,7 @@ static void create_object(unsigned long ptr, size_t size, int min_count,
struct prio_tree_node *node;
struct stack_trace trace;
- object = kmem_cache_alloc(object_cache, gfp & ~GFP_SLAB_BUG_MASK);
+ object = kmem_cache_alloc(object_cache, gfp & GFP_KMEMLEAK_MASK);
if (!object) {
kmemleak_panic("kmemleak: Cannot allocate a kmemleak_object "
"structure\n");
@@ -636,7 +639,7 @@ static void add_scan_area(unsigned long ptr, unsigned long offset,
return;
}
- area = kmem_cache_alloc(scan_area_cache, gfp & ~GFP_SLAB_BUG_MASK);
+ area = kmem_cache_alloc(scan_area_cache, gfp & GFP_KMEMLEAK_MASK);
if (!area) {
kmemleak_warn("kmemleak: Cannot allocate a scan area\n");
goto out;
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