Patch "sched: Unify more update_curr*()" has been added to the 6.6-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    sched: Unify more update_curr*()

to the 6.6-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     sched-unify-more-update_curr.patch
and it can be found in the queue-6.6 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 09e2cbee382d5b6ad440ccacd38906156dcd8720
Author: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Date:   Mon Nov 6 14:04:01 2023 +0100

    sched: Unify more update_curr*()
    
    [ Upstream commit c708a4dc5ab547edc3d6537233ca9e79ea30ce47 ]
    
    Now that trace_sched_stat_runtime() no longer takes a vruntime
    argument, the task specific bits are identical between
    update_curr_common() and update_curr().
    
    Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
    Stable-dep-of: 0664e2c311b9 ("sched/deadline: Fix warning in migrate_enable for boosted tasks")
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 062447861d8e6..3b2cfdb8d788d 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -1173,6 +1173,13 @@ static s64 update_curr_se(struct rq *rq, struct sched_entity *curr)
 	return delta_exec;
 }
 
+static inline void update_curr_task(struct task_struct *p, s64 delta_exec)
+{
+	trace_sched_stat_runtime(p, delta_exec);
+	account_group_exec_runtime(p, delta_exec);
+	cgroup_account_cputime(p, delta_exec);
+}
+
 /*
  * Used by other classes to account runtime.
  */
@@ -1182,12 +1189,8 @@ s64 update_curr_common(struct rq *rq)
 	s64 delta_exec;
 
 	delta_exec = update_curr_se(rq, &curr->se);
-	if (unlikely(delta_exec <= 0))
-		return delta_exec;
-
-	trace_sched_stat_runtime(curr, delta_exec);
-	account_group_exec_runtime(curr, delta_exec);
-	cgroup_account_cputime(curr, delta_exec);
+	if (likely(delta_exec > 0))
+		update_curr_task(curr, delta_exec);
 
 	return delta_exec;
 }
@@ -1211,13 +1214,8 @@ static void update_curr(struct cfs_rq *cfs_rq)
 	update_deadline(cfs_rq, curr);
 	update_min_vruntime(cfs_rq);
 
-	if (entity_is_task(curr)) {
-		struct task_struct *curtask = task_of(curr);
-
-		trace_sched_stat_runtime(curtask, delta_exec);
-		cgroup_account_cputime(curtask, delta_exec);
-		account_group_exec_runtime(curtask, delta_exec);
-	}
+	if (entity_is_task(curr))
+		update_curr_task(task_of(curr), delta_exec);
 
 	account_cfs_rq_runtime(cfs_rq, delta_exec);
 }