mm, slub: make locking in deactivate_slab() irq-safe

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dectivate_slab() now no longer touches the kmem_cache_cpu structure, so it will
be possible to call it with irqs enabled. Just convert the spin_lock calls to
their irq saving/restoring variants to make it irq-safe.

Note we now have to use cmpxchg_double_slab() for irq-safe slab_lock(), because
in some situations we don't take the list_lock, which would disable irqs.

Signed-off-by: Vlastimil Babka <vbabka@suse.cz>

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Vlastimil Babka 2021-05-12 13:59:58 +02:00

parent a019d20162

commit 3406e91bce

1 changed files with 5 additions and 4 deletions

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mm/slub.c

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