[PATCH 07/14] kmemleak: Add kmemleak_alloc callback from alloc_large_system_hash

Catalin Marinas
2009-04-24T16:43:51Z

The alloc_large_system_hash function is called from various places in
the kernel and it contains pointers to other allocated structures. It
therefore needs to be traced by kmemleak.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
mm/page_alloc.c | 11 +++++++++++
1 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index e2f2699..c722aa6 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -46,6 +46,7 @@
#include <linux/page-isolation.h>
#include <linux/page_cgroup.h>
#include <linux/debugobjects.h>
+#include <linux/kmemleak.h>

#include <asm/tlbflush.h>
#include <asm/div64.h>
@@ -4597,6 +4598,16 @@ void *__init alloc_large_system_hash(const char *tablename,
if (_hash_mask)
*_hash_mask = (1 << log2qty) - 1;

+ /*
+ * If hashdist is set, the table allocation is done with __vmalloc()
+ * which invokes the kmemleak_alloc() callback. This function may also
+ * be called before the slab and kmemleak are initialised when
+ * kmemleak simply buffers the request to be executed later
+ * (GFP_ATOMIC flag ignored in this case).
+ */
+ if (!hashdist)
+ kmemleak_alloc(table, size, 1, GFP_ATOMIC);
+
return table;
}