+ mm-slub-convert-kmem_cpu_slab-protection-to-local_lock-fix.patch added to -mm tree

+ mm-slub-convert-kmem_cpu_slab-protection-to-local_lock-fix.patch added to -mm tree

[akpm]

The patch titled
     Subject: mm, slab: simplify lockdep_assert_held in lockdep_assert_held()
has been added to the -mm tree.  Its filename is
     mm-slub-convert-kmem_cpu_slab-protection-to-local_lock-fix.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/mm-slub-convert-kmem_cpu_slab-protection-to-local_lock-fix.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/mm-slub-convert-kmem_cpu_slab-protection-to-local_lock-fix.patch

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------------------------------------------------------
From: Vlastimil Babka <vbabka@suse.cz>
Subject: mm, slab: simplify lockdep_assert_held in lockdep_assert_held()

Sebastian reports [1] that the special version of lockdep_assert_held() for a
local lock with PREEMPT_RT is no longer necessary, and we can simplify.

[1] https://lore.kernel.org/linux-mm/20210817153937.hxnuh7mqp6vuiyws@linutronix.de/

This is a fixup for mmotm patch
mm-slub-convert-kmem_cpu_slab-protection-to-local_lock.patch

Link: https://lkml.kernel.org/r/7e9ccf34-57d1-786b-2dfd-3b9ba78e1b32@suse.cz
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Reported-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/slub.c |    4 ----
 1 file changed, 4 deletions(-)

--- a/mm/slub.c~mm-slub-convert-kmem_cpu_slab-protection-to-local_lock-fix
+++ a/mm/slub.c
@@ -2913,11 +2913,7 @@ redo:
 
 load_freelist:
 
-#ifdef CONFIG_PREEMPT_RT
-	lockdep_assert_held(this_cpu_ptr(&s->cpu_slab->lock.lock));
-#else
 	lockdep_assert_held(this_cpu_ptr(&s->cpu_slab->lock));
-#endif
 
 	/*
 	 * freelist is pointing to the list of objects to be used.
_

Patches currently in -mm which might be from vbabka@suse.cz are

mm-slub-dont-call-flush_all-from-slab_debug_trace_open.patch
mm-slub-allocate-private-object-map-for-debugfs-listings.patch
mm-slub-allocate-private-object-map-for-validate_slab_cache.patch
mm-slub-dont-disable-irq-for-debug_check_no_locks_freed.patch
mm-slub-remove-redundant-unfreeze_partials-from-put_cpu_partial.patch
mm-slub-unify-cmpxchg_double_slab-and-__cmpxchg_double_slab.patch
mm-slub-extract-get_partial-from-new_slab_objects.patch
mm-slub-dissolve-new_slab_objects-into-___slab_alloc.patch
mm-slub-return-slab-page-from-get_partial-and-set-c-page-afterwards.patch
mm-slub-restructure-new-page-checks-in-___slab_alloc.patch
mm-slub-simplify-kmem_cache_cpu-and-tid-setup.patch
mm-slub-move-disabling-enabling-irqs-to-___slab_alloc.patch
mm-slub-do-initial-checks-in-___slab_alloc-with-irqs-enabled.patch
mm-slub-do-initial-checks-in-___slab_alloc-with-irqs-enabled-fix.patch
mm-slub-do-initial-checks-in-___slab_alloc-with-irqs-enabled-fix-fix.patch
mm-slub-move-disabling-irqs-closer-to-get_partial-in-___slab_alloc.patch
mm-slub-restore-irqs-around-calling-new_slab.patch
mm-slub-validate-slab-from-partial-list-or-page-allocator-before-making-it-cpu-slab.patch
mm-slub-check-new-pages-with-restored-irqs.patch
mm-slub-stop-disabling-irqs-around-get_partial.patch
mm-slub-move-reset-of-c-page-and-freelist-out-of-deactivate_slab.patch
mm-slub-make-locking-in-deactivate_slab-irq-safe.patch
mm-slub-call-deactivate_slab-without-disabling-irqs.patch
mm-slub-move-irq-control-into-unfreeze_partials.patch
mm-slub-discard-slabs-in-unfreeze_partials-without-irqs-disabled.patch
mm-slub-detach-whole-partial-list-at-once-in-unfreeze_partials.patch
mm-slub-separate-detaching-of-partial-list-in-unfreeze_partials-from-unfreezing.patch
mm-slub-only-disable-irq-with-spin_lock-in-__unfreeze_partials.patch
mm-slub-dont-disable-irqs-in-slub_cpu_dead.patch
mm-slab-make-flush_slab-possible-to-call-with-irqs-enabled.patch
mm-slub-move-flush_cpu_slab-invocations-__free_slab-invocations-out-of-irq-context-fix.patch
mm-slub-move-flush_cpu_slab-invocations-__free_slab-invocations-out-of-irq-context-fix-2.patch
mm-slub-optionally-save-restore-irqs-in-slab_lock.patch
mm-slub-make-slab_lock-disable-irqs-with-preempt_rt.patch
mm-slub-protect-put_cpu_partial-with-disabled-irqs-instead-of-cmpxchg.patch
mm-slub-use-migrate_disable-on-preempt_rt.patch
mm-slub-convert-kmem_cpu_slab-protection-to-local_lock.patch
mm-slub-convert-kmem_cpu_slab-protection-to-local_lock-fix.patch