+ sched-introduce-this_rq_lock_irq.patch added to -mm tree

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The patch titled
     Subject: sched: introduce this_rq_lock_irq()
has been added to the -mm tree.  Its filename is
     sched-introduce-this_rq_lock_irq.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/sched-introduce-this_rq_lock_irq.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/sched-introduce-this_rq_lock_irq.patch

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------------------------------------------------------
From: Johannes Weiner <hannes@xxxxxxxxxxx>
Subject: sched: introduce this_rq_lock_irq()

do_sched_yield() disables IRQs, looks up this_rq() and locks it.  The next
patch is adding another site with the same pattern, so provide a
convenience function for it.

Link: http://lkml.kernel.org/r/20180712172942.10094-8-hannes@xxxxxxxxxxx
Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Christopher Lameter <cl@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Johannes Weiner <jweiner@xxxxxx>
Cc: Mike Galbraith <efault@xxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Shakeel Butt <shakeelb@xxxxxxxxxx>
Cc: Suren Baghdasaryan <surenb@xxxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Cc: Vinayak Menon <vinmenon@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---


diff -puN kernel/sched/core.c~sched-introduce-this_rq_lock_irq kernel/sched/core.c
--- a/kernel/sched/core.c~sched-introduce-this_rq_lock_irq
+++ a/kernel/sched/core.c
@@ -4960,9 +4960,7 @@ static void do_sched_yield(void)
 	struct rq_flags rf;
 	struct rq *rq;
 
-	local_irq_disable();
-	rq = this_rq();
-	rq_lock(rq, &rf);
+	rq = this_rq_lock_irq(&rf);
 
 	schedstat_inc(rq->yld_count);
 	current->sched_class->yield_task(rq);
diff -puN kernel/sched/sched.h~sched-introduce-this_rq_lock_irq kernel/sched/sched.h
--- a/kernel/sched/sched.h~sched-introduce-this_rq_lock_irq
+++ a/kernel/sched/sched.h
@@ -1126,6 +1126,18 @@ rq_unlock(struct rq *rq, struct rq_flags
 	raw_spin_unlock(&rq->lock);
 }
 
+static inline struct rq *
+this_rq_lock_irq(struct rq_flags *rf)
+	__acquires(rq->lock)
+{
+	struct rq *rq;
+
+	local_irq_disable();
+	rq = this_rq();
+	rq_lock(rq, rf);
+	return rq;
+}
+
 #ifdef CONFIG_NUMA
 enum numa_topology_type {
 	NUMA_DIRECT,
_

Patches currently in -mm which might be from hannes@xxxxxxxxxxx are

mm-workingset-tell-cache-transitions-from-workingset-thrashing.patch
delayacct-track-delays-from-thrashing-cache-pages.patch
sched-loadavg-consolidate-load_int-load_frac-calc_load.patch
sched-loadavg-make-calc_load_n-public.patch
sched-schedh-make-rq-locking-and-clock-functions-available-in-statsh.patch
sched-introduce-this_rq_lock_irq.patch
psi-pressure-stall-information-for-cpu-memory-and-io.patch
psi-cgroup-support.patch
psi-aggregate-ongoing-stall-events-when-somebody-reads-pressure.patch

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