From: Bart Van Assche <bvanassche@acm.org>
Date: Wed, 28 Nov 2018 23:43:09 +0000 (-0800)
Subject: timekeeping: Use proper seqcount initializer
X-Git-Tag: v3.18.135~89
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=1f28d7f2b3488af27904b8b44003dc3f5402921e;p=profile%2Fwearable%2Fplatform%2Fkernel%2Flinux-3.18-exynos7270.git

timekeeping: Use proper seqcount initializer

[ 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@acm.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: peterz@infradead.org
Cc: tj@kernel.org
Cc: johannes.berg@intel.com
Link: https://lkml.kernel.org/r/20181128234325.110011-12-bvanassche@acm.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 70e3e6a..0539761 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;