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| author | Davidlohr Bueso <dave@stgolabs.net> | 2020-10-21 12:07:49 -0700 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-10-26 11:04:14 +0100 |
| commit | 1a2b85f1e2a93a3f84243e654d225e4088735336 (patch) | |
| tree | c2d9e3d2e2cc4886ba50db2f38dd3b27cd173c6e | |
| parent | 3650b228f83adda7e5ee532e2b90429c03f7b9ec (diff) | |
| download | lwn-1a2b85f1e2a93a3f84243e654d225e4088735336.tar.gz lwn-1a2b85f1e2a93a3f84243e654d225e4088735336.zip | |
timekeeping: Convert jiffies_seq to seqcount_raw_spinlock_t
Use the new api and associate the seqcounter to the jiffies_lock enabling
lockdep support - although for this particular case the write-side locking
and non-preemptibility are quite obvious.
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20201021190749.19363-1-dave@stgolabs.net
| -rw-r--r-- | kernel/time/jiffies.c | 3 | ||||
| -rw-r--r-- | kernel/time/timekeeping.h | 2 |
2 files changed, 3 insertions, 2 deletions
diff --git a/kernel/time/jiffies.c b/kernel/time/jiffies.c index eddcf4970444..a5cffe2a1770 100644 --- a/kernel/time/jiffies.c +++ b/kernel/time/jiffies.c @@ -59,7 +59,8 @@ static struct clocksource clocksource_jiffies = { }; __cacheline_aligned_in_smp DEFINE_RAW_SPINLOCK(jiffies_lock); -__cacheline_aligned_in_smp seqcount_t jiffies_seq; +__cacheline_aligned_in_smp seqcount_raw_spinlock_t jiffies_seq = + SEQCNT_RAW_SPINLOCK_ZERO(jiffies_seq, &jiffies_lock); #if (BITS_PER_LONG < 64) u64 get_jiffies_64(void) diff --git a/kernel/time/timekeeping.h b/kernel/time/timekeeping.h index 099737f6f10c..6c2cbd9ef999 100644 --- a/kernel/time/timekeeping.h +++ b/kernel/time/timekeeping.h @@ -26,7 +26,7 @@ extern void do_timer(unsigned long ticks); extern void update_wall_time(void); extern raw_spinlock_t jiffies_lock; -extern seqcount_t jiffies_seq; +extern seqcount_raw_spinlock_t jiffies_seq; #define CS_NAME_LEN 32 |