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authorPeter Zijlstra <peterz@infradead.org>2017-12-21 10:01:24 +0100
committerIngo Molnar <mingo@kernel.org>2018-03-09 07:59:16 +0100
commita22e47a4e3f5a9e50a827c5d94705ace3b1eac0b (patch)
tree907cfb61b5233db6935d234e9de615796d137acf /kernel/sched/sched.h
parent8f111bc357aa811e0bb5fdfe34c4c9efdafc15b9 (diff)
downloadlinux-a22e47a4e3f5a9e50a827c5d94705ace3b1eac0b.tar.bz2
sched/core: Convert nohz_flags to atomic_t
Using atomic_t allows us to use the more flexible bitops provided there. Also its smaller. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched/sched.h')
-rw-r--r--kernel/sched/sched.h11
1 files changed, 6 insertions, 5 deletions
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 23ba4dd76ac4..d98e761b962f 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -763,7 +763,7 @@ struct rq {
#ifdef CONFIG_SMP
unsigned long last_load_update_tick;
#endif /* CONFIG_SMP */
- unsigned long nohz_flags;
+ atomic_t nohz_flags;
#endif /* CONFIG_NO_HZ_COMMON */
/* capture load from *all* tasks on this CPU: */
@@ -2034,10 +2034,11 @@ extern void cfs_bandwidth_usage_inc(void);
extern void cfs_bandwidth_usage_dec(void);
#ifdef CONFIG_NO_HZ_COMMON
-enum rq_nohz_flag_bits {
- NOHZ_TICK_STOPPED,
- NOHZ_BALANCE_KICK,
-};
+#define NOHZ_TICK_STOPPED_BIT 0
+#define NOHZ_BALANCE_KICK_BIT 1
+
+#define NOHZ_TICK_STOPPED BIT(NOHZ_TICK_STOPPED_BIT)
+#define NOHZ_BALANCE_KICK BIT(NOHZ_BALANCE_KICK_BIT)
#define nohz_flags(cpu) (&cpu_rq(cpu)->nohz_flags)