From 7952f98818d561ed0e11434a7a16acd9a7bae859 Mon Sep 17 00:00:00 2001 From: Catalin Marinas Date: Mon, 19 Jul 2010 11:54:14 +0100 Subject: kmemleak: Annotate false positive in init_section_page_cgroup() The pointer to the page_cgroup table allocated in init_section_page_cgroup() is stored in section->page_cgroup as (base - pfn). Since this value does not point to the beginning or inside the allocated memory block, kmemleak reports a false positive. This was reported in bugzilla.kernel.org as #16297. Signed-off-by: Catalin Marinas Reported-by: Adrien Dessemond Reviewed-by: KAMEZAWA Hiroyuki Cc: Pekka Enberg Cc: Andrew Morton --- mm/page_cgroup.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'mm/page_cgroup.c') diff --git a/mm/page_cgroup.c b/mm/page_cgroup.c index 6c0081441a32..5bffada7cde1 100644 --- a/mm/page_cgroup.c +++ b/mm/page_cgroup.c @@ -9,6 +9,7 @@ #include #include #include +#include static void __meminit __init_page_cgroup(struct page_cgroup *pc, unsigned long pfn) @@ -126,6 +127,12 @@ static int __init_refok init_section_page_cgroup(unsigned long pfn) if (!base) base = vmalloc(table_size); } + /* + * The value stored in section->page_cgroup is (base - pfn) + * and it does not point to the memory block allocated above, + * causing kmemleak false positives. + */ + kmemleak_not_leak(base); } else { /* * We don't have to allocate page_cgroup again, but -- cgit v1.2.3