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Subject[PATCH v3 1/6] sched: Introduce the finish_arch_post_lock_switch() scheduler hook
Date
This hook is called by the scheduler after rq->lock has been released
and interrupts enabled. It will be used in subsequent patches on the ARM
architecture.

Reviewed-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Frank Rowand <frank.rowand@am.sony.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
kernel/sched/core.c | 1 +
kernel/sched/sched.h | 3 +++
2 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index df00cb0..f1db6d8 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -1937,6 +1937,7 @@ static void finish_task_switch(struct rq *rq, struct task_struct *prev)
local_irq_enable();
#endif /* __ARCH_WANT_INTERRUPTS_ON_CTXSW */
finish_lock_switch(rq, prev);
+ finish_arch_post_lock_switch();
trace_sched_stat_sleeptime(current, rq->clock);

fire_sched_in_preempt_notifiers(current);
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 98c0c26..d72483d 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -692,6 +692,9 @@ static inline int task_running(struct rq *rq, struct task_struct *p)
#ifndef finish_arch_switch
# define finish_arch_switch(prev) do { } while (0)
#endif
+#ifndef finish_arch_post_lock_switch
+# define finish_arch_post_lock_switch() do { } while (0)
+#endif

#ifndef __ARCH_WANT_UNLOCKED_CTXSW
static inline void prepare_lock_switch(struct rq *rq, struct task_struct *next)


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