Commit 63724e9519a3 for kernel

commit 63724e9519a312d7d0b8767d0aeb53bc15a7fdd5
Merge: 97450311306e 192d852129b1
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date:   Sun Mar 15 10:49:47 2026 -0700

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

    Pull scheduler fixes from Ingo Molnar:
     "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"

    * tag 'sched-urgent-2026-03-15' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
      sched/mmcid: Avoid full tasklist walks
      sched/mmcid: Remove pointless preempt guard
      sched/mmcid: Handle vfork()/CLONE_VM correctly
      sched/mmcid: Prevent CID stalls due to concurrent forks