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slab: remove unused SL_CPU slab_stat_type

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Since the removal of the per-cpu slab in commit 32c894c727 ("slab:
remove struct kmem_cache_cpu"), show_slab_objects() no longer has a
branch handling SO_CPU, so cpu_slabs_show() always produces "0".

Emit "0\n" directly instead, matching the sibling cpu_partial and
slabs_cpu_partial stubs, and remove the now-unused SO_CPU macro and
SL_CPU enum value.

No functional change intended; the cpu_slabs sysfs attribute continues
to read 0.

Signed-off-by: Seongjun Hong <hsj0512@snu.ac.kr>
Reviewed-by: Harry Yoo (Oracle) <harry@kernel.org>
Reviewed-by: Hao Li <hao.li@linux.dev>
Link: https://patch.msgid.link/20260701140634.71608-1-hsj0512@snu.ac.kr
Signed-off-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>
This commit is contained in:
Seongjun Hong 2026-07-01 14:06:33 +00:00 committed by Vlastimil Babka (SUSE)
parent a561e19e76
commit 0125c78324
1 changed files with 1 additions and 3 deletions
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4
mm/slub.c
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@ -8966,14 +8966,12 @@ static void process_slab(struct loc_track *t, struct kmem_cache *s,
enum slab_stat_type {
SL_ALL, /* All slabs */
SL_PARTIAL, /* Only partially allocated slabs */
SL_CPU, /* Only slabs used for cpu caches */
SL_OBJECTS, /* Determine allocated objects not slabs */
SL_TOTAL /* Determine object capacity not slabs */
};
#define SO_ALL (1 << SL_ALL)
#define SO_PARTIAL (1 << SL_PARTIAL)
#define SO_CPU (1 << SL_CPU)
#define SO_OBJECTS (1 << SL_OBJECTS)
#define SO_TOTAL (1 << SL_TOTAL)
@ -9162,7 +9160,7 @@ SLAB_ATTR_RO(partial);
static ssize_t cpu_slabs_show(struct kmem_cache *s, char *buf)
{
return show_slab_objects(s, buf, SO_CPU);
return sysfs_emit(buf, "0\n");
}
SLAB_ATTR_RO(cpu_slabs);