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>
diff --git a/mm/percpu.c b/mm/percpu.c
index 5954e7a..3d0f545 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -639,7 +639,7 @@
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;
