[PATCH 4.4 027/143] timekeeping: Use proper seqcount initializer

From: Greg Kroah-Hartman
Date: Mon Feb 18 2019 - 09:27:47 EST


4.4-stable review patch. If anyone has any objections, please let me know.

------------------

[ Upstream commit ce10a5b3954f2514af726beb78ed8d7350c5e41c ]

tk_core.seq is initialized open coded, but that misses to initialize the
lockdep map when lockdep is enabled. Lockdep splats involving tk_core seq
consequently lack a name and are hard to read.

Use the proper initializer which takes care of the lockdep map
initialization.

[ tglx: Massaged changelog ]

Signed-off-by: Bart Van Assche <bvanassche@xxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: peterz@xxxxxxxxxxxxx
Cc: tj@xxxxxxxxxx
Cc: johannes.berg@xxxxxxxxx
Link: https://lkml.kernel.org/r/20181128234325.110011-12-bvanassche@xxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
kernel/time/timekeeping.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index fed86b2dfc89..d9837d25dfe0 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -39,7 +39,9 @@
static struct {
seqcount_t seq;
struct timekeeper timekeeper;
-} tk_core ____cacheline_aligned;
+} tk_core ____cacheline_aligned = {
+ .seq = SEQCNT_ZERO(tk_core.seq),
+};

static DEFINE_RAW_SPINLOCK(timekeeper_lock);
static struct timekeeper shadow_timekeeper;
--
2.19.1