[PATCHv2] nilfs2: eliminate sparse warning - "context imbalance"

[Jiro SEKIBA <jir-hfpbi5WX9J54Eiagz67IpQ@public.gmane.org>]

insert sparse annotations to fix following sparse warning.

fs/nilfs2/segment.c:2681:3: warning: context imbalance in 'nilfs_segctor_kill_thread' - unexpected unlock

Signed-off-by: Jiro SEKIBA <jir-hfpbi5WX9J54Eiagz67IpQ@public.gmane.org>
---
 fs/nilfs2/segment.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c
index 172ad42..6494e9d 100644
--- a/fs/nilfs2/segment.c
+++ b/fs/nilfs2/segment.c
@@ -2673,7 +2673,14 @@ static int nilfs_segctor_start_thread(struct nilfs_sc_info *sci)
 	return 0;
 }
 
+/*
+ * nilfs_segctor_kill_thread is only called inside sc_state_lock lock.
+ * sparse doesn't detect the context and warn "unexpected unlock".
+ * __acquires/__releases pretend to lock/unlockk the sc_state_lock for sparse.
+ */
 static void nilfs_segctor_kill_thread(struct nilfs_sc_info *sci)
+	__acquires(&sci->sc_state_lock)
+	__releases(&sci->sc_state_lock)
 {
 	sci->sc_state |= NILFS_SEGCTOR_QUIT;
 
-- 
1.5.6.5

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