percpu: kill compile warning in pcpu_populate_chunk()

Impact: remove compile warning

Mark local variable map_end in pcpu_populate_chunk() with
uninitialized_var().  The variable is always used in tandem with
map_start and guaranteed to be initialized before use but gcc doesn't
understand that.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 1 insertions, 1 deletions

diff --git a/mm/percpu.c b/mm/percpu.c
index 5954e7a9eb1e..3d0f5456827c 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -639,7 +639,7 @@ static int pcpu_populate_chunk(struct pcpu_chunk *chunk, int off, int size)
         int page_start = PFN_DOWN(off);
         int page_end = PFN_UP(off + size);
         int map_start = -1;
-        int map_end;
+        int uninitialized_var(map_end);
         unsigned int cpu;
         int i;