Commit e2bd1b136926 for kernel

commit e2bd1b136926f1ff65d4e0f87ac49b9a4621238c
Merge: 5920da4455a3 fd3634312a04
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date:   Sun Mar 1 13:32:32 2026 -0800

    Merge tag 'core-debugobjects-2026-03-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

    Pull debugobjects fix from Thomas Gleixner:
     "A single fix for debugobjects.

      The deferred page initialization prevents debug objects from
      allocating slab pages until the initialization is complete. That
      causes depletion of the pool and disabling of debugobjects.

      The reason is that debugobjects uses __GFP_HIGH for allocations as it
      might be invoked from arbitrary contexts. When PREEMPT_COUNT is
      disabled there is no way to know whether the context is safe to set
      __GFP_KSWAPD_RECLAIM.

      This worked until v6.18. Since then allocations w/o a reclaim flag
      cause new_slab() to end up in alloc_frozen_pages_nolock_noprof(),
      which returns early when deferred page initialization has not yet
      completed.

      Work around that when PREEMPT_COUNT is enabled as the preempt counter
      allows debugobjects to add __GFP_KSWAPD_RECLAIM to the GFP flags when
      the context is preemtible. When PREEMPT_COUNT is disabled the context
      is unknown and the reclaim bit can't be set because the caller might
      hold locks which might deadlock in the allocator.

      That makes debugobjects depend on PREEMPT_COUNT ||
      !DEFERRED_STRUCT_PAGE_INIT, which limits the coverage slightly, but
      keeps it functional for most cases"

    * tag 'core-debugobjects-2026-03-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
      debugobject: Make it work with deferred page initialization - again