[PATCH 1/4] percpu: add missing lockdep_assert_held to func pcpu_free_area

[Dennis Zhou]

Add a missing lockdep_assert_held for pcpu_lock to improve consistency
and safety throughout mm/percpu.c.

Signed-off-by: Dennis Zhou <denn...@fb.com>
---
 mm/percpu.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mm/percpu.c b/mm/percpu.c
index e0aa8ae..f94a5eb 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -672,6 +672,8 @@ static void pcpu_free_area(struct pcpu_chunk *chunk, int 
freeme,
        int to_free = 0;
        int *p;
 
+       lockdep_assert_held(&pcpu_lock);
+
        freeme |= 1;    /* we are searching for <given offset, in use> pair */
 
        i = 0;
-- 
2.9.3