Merge tag 'smp-urgent-2026-07-26' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull SMP debug fixes from Ingo Molnar:

 - SMP-call fixes when CSD lock debugging is enabled (Chuyi Zhou)

* tag 'smp-urgent-2026-07-26' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  smp: Make CSD lock acquisition atomic for debug mode
  smp: Avoid invalid per-CPU CSD lookup with CSD lock debug