* [PATCH] timekeeping: Convert jiffies_seq to seqcount_raw_spinlock_t
@ 2020-10-21 19:07 Davidlohr Bueso
2020-10-26 10:08 ` [tip: timers/core] " tip-bot2 for Davidlohr Bueso
0 siblings, 1 reply; 2+ messages in thread
From: Davidlohr Bueso @ 2020-10-21 19:07 UTC (permalink / raw)
To: peterz; +Cc: tglx, mingo, a.darwish, dave, linux-kernel, Davidlohr Bueso
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>
---
kernel/time/jiffies.c | 3 ++-
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
--
2.26.2
^ permalink raw reply related [flat|nested] 2+ messages in thread
* [tip: timers/core] timekeeping: Convert jiffies_seq to seqcount_raw_spinlock_t
2020-10-21 19:07 [PATCH] timekeeping: Convert jiffies_seq to seqcount_raw_spinlock_t Davidlohr Bueso
@ 2020-10-26 10:08 ` tip-bot2 for Davidlohr Bueso
0 siblings, 0 replies; 2+ messages in thread
From: tip-bot2 for Davidlohr Bueso @ 2020-10-26 10:08 UTC (permalink / raw)
To: linux-tip-commits; +Cc: Davidlohr Bueso, Thomas Gleixner, x86, LKML
The following commit has been merged into the timers/core branch of tip:
Commit-ID: 1a2b85f1e2a93a3f84243e654d225e4088735336
Gitweb: https://git.kernel.org/tip/1a2b85f1e2a93a3f84243e654d225e4088735336
Author: Davidlohr Bueso <dave@stgolabs.net>
AuthorDate: Wed, 21 Oct 2020 12:07:49 -07:00
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Mon, 26 Oct 2020 11:04:14 +01:00
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
---
kernel/time/jiffies.c | 3 ++-
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 eddcf49..a5cffe2 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 099737f..6c2cbd9 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
^ permalink raw reply related [flat|nested] 2+ messages in thread
end of thread, other threads:[~2020-10-26 10:09 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-10-21 19:07 [PATCH] timekeeping: Convert jiffies_seq to seqcount_raw_spinlock_t Davidlohr Bueso
2020-10-26 10:08 ` [tip: timers/core] " tip-bot2 for Davidlohr Bueso
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.