Merge branch 'sched/core' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into for-6.12

Pull tip/sched/core to resolve the following four conflicts. While 2-4 are
simple context conflicts, 1 is a bit subtle and easy to resolve incorrectly.

1. 2c8d046d5d51 ("sched: Add normal_policy()")
   vs.
   faa42d29419d ("sched/fair: Make SCHED_IDLE entity be preempted in strict hierarchy")

The former converts direct test on p->policy to use the helper
normal_policy(). The latter moves the p->policy test to a different
location. Resolve by converting the test on p->plicy in the new location to
use normal_policy().

2. a7a9fc549293 ("sched_ext: Add boilerplate for extensible scheduler class")
   vs.
   a110a81c52a9 ("sched/deadline: Deferrable dl server")

Both add calls to put_prev_task_idle() and set_next_task_idle(). Simple
context conflict. Resolve by taking changes from both.

3. a7a9fc549293 ("sched_ext: Add boilerplate for extensible scheduler class")
   vs.
   c245910049d0 ("sched/core: Add clearing of ->dl_server in put_prev_task_balance()")

The former changes for_each_class() itertion to use for_each_active_class().
The latter moves away the adjacent dl_server handling code. Simple context
conflict. Resolve by taking changes from both.

4. 60c27fb59f6c ("sched_ext: Implement sched_ext_ops.cpu_online/offline()")
   vs.
   31b164e2e4af ("sched/smt: Introduce sched_smt_present_inc/dec() helper")
   2f027354122f ("sched/core: Introduce sched_set_rq_on/offline() helper")

The former adds scx_rq_deactivate() call. The latter two change code around
it. Simple context conflict. Resolve by taking changes from both.

Signed-off-by: Tejun Heo <tj@kernel.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c
index c7a218123b7a..e53e2da04ba4 100644
--- a/kernel/sched/idle.c
+++ b/kernel/sched/idle.c
@@ -452,6 +452,7 @@ static void wakeup_preempt_idle(struct rq *rq, struct task_struct *p, int flags)
 
 static void put_prev_task_idle(struct rq *rq, struct task_struct *prev)
 {
+	dl_server_update_idle_time(rq, prev);
 	scx_update_idle(rq, false);
 }
 
@@ -460,6 +461,7 @@ static void set_next_task_idle(struct rq *rq, struct task_struct *next, bool fir
 	update_idle_core(rq);
 	scx_update_idle(rq, true);
 	schedstat_inc(rq->sched_goidle);
+	next->se.exec_start = rq_clock_task(rq);
 }
 
 #ifdef CONFIG_SMP