[GIT PULL] scheduler fixes

[Ingo Molnar]

Linus,

Please pull the latest sched/urgent Git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git sched-urgent-2026-03-15

for you to fetch changes up to 192d852129b1b7c4f0ddbab95d0de1efd5ee1405:

More MM-CID fixes, mostly fixing hangs/races:

 - Fix CID hangs due to a race between concurrent forks

 - Fix vfork()/CLONE_VM MMCID bug causing hangs

 - Remove pointless preemption guard

 - Fix CID task list walk performance regression on large systems
   by removing the known-flaky and slow counting logic using
   for_each_process_thread() in mm_cid_*fixup_tasks_to_cpus(),
   and implementing a simple sched_mm_cid::node list instead

 Thanks,

	Ingo

------------------>
Thomas Gleixner (4):
      sched/mmcid: Prevent CID stalls due to concurrent forks
      sched/mmcid: Handle vfork()/CLONE_VM correctly
      sched/mmcid: Remove pointless preempt guard
      sched/mmcid: Avoid full tasklist walks


 include/linux/rseq_types.h |  6 +++-
 include/linux/sched.h      |  2 --
 kernel/fork.c              |  3 +-
 kernel/sched/core.c        | 79 ++++++++++++++++------------------------------
 4 files changed, 34 insertions(+), 56 deletions(-)