mm/slub: refactor freelist to use custom type

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Currently the SLUB code represents encoded freelist entries as "void*".
That's misleading, those things are encoded under
CONFIG_SLAB_FREELIST_HARDENED so that they're not actually dereferencable.

Give them their own type, and split freelist_ptr() into one function per
direction (one for encoding, one for decoding).

Signed-off-by: Jann Horn <jannh@google.com>
Co-developed-by: Matteo Rizzo <matteorizzo@google.com>
Signed-off-by: Matteo Rizzo <matteorizzo@google.com>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>

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Jann Horn 2023-07-04 13:58:34 +00:00 • committed by Vlastimil Babka

parent 06c2afb862

commit 44f6a42d49

1 changed files with 32 additions and 11 deletions

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mm/slub.c

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