mm, slab: use an enum to define SLAB_ cache creation flags

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The values of SLAB_ cache creation flags are defined by hand, which is
tedious and error-prone. Use an enum to assign the bit number and a
__SLAB_FLAG_BIT() macro to #define the final flags.

This renumbers the flag values, which is OK as they are only used
internally.

Also define a __SLAB_FLAG_UNUSED macro to assign value to flags disabled
by their respective config options in a unified and sparse-friendly way.

Reviewed-and-tested-by: Xiongwei Song <xiongwei.song@windriver.com>
Reviewed-by: Chengming Zhou <chengming.zhou@linux.dev>
Reviewed-by: Roman Gushchin <roman.gushchin@linux.dev>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>

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This commit is contained in:

Vlastimil Babka 2024-02-23 19:27:18 +01:00

parent cdeeaaba17

commit cc61eb851c

2 changed files with 70 additions and 30 deletions

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94

include/linux/slab.h

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6

mm/slub.c

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