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slab: use struct freelist_counters for local variables instead of struct slab

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In several functions we declare local struct slab variables so we can
work with the freelist and counters fields (including the sub-counters
that are in the union) comfortably.

With struct freelist_counters containing the full counters definition,
we can now reduce the local variables to that type as we don't need the
other fields in struct slab.

Reviewed-by: Harry Yoo <harry.yoo@oracle.com>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
This commit is contained in:
Vlastimil Babka
2025-11-07 14:51:25 +01:00
parent 3993ca9d64
commit 32cf9f2182
1 changed files with 4 additions and 5 deletions
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9
mm/slub.c
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@@ -3725,8 +3725,7 @@ static void deactivate_slab(struct kmem_cache *s, struct slab *slab,
void *nextfree, *freelist_iter, *freelist_tail;
int tail = DEACTIVATE_TO_HEAD;
unsigned long flags = 0;
struct slab new;
struct slab old;
struct freelist_counters old, new;
if (READ_ONCE(slab->freelist)) {
stat(s, DEACTIVATE_REMOTE_FREES);
@@ -4390,7 +4389,7 @@ __update_cpu_freelist_fast(struct kmem_cache *s,
*/
static inline void *get_freelist(struct kmem_cache *s, struct slab *slab)
{
struct slab new;
struct freelist_counters new;
unsigned long counters;
void *freelist;
@@ -4418,7 +4417,7 @@ static inline void *get_freelist(struct kmem_cache *s, struct slab *slab)
*/
static inline void *freeze_slab(struct kmem_cache *s, struct slab *slab)
{
struct slab new;
struct freelist_counters new;
unsigned long counters;
void *freelist;
@@ -5867,7 +5866,7 @@ static void __slab_free(struct kmem_cache *s, struct slab *slab,
{
void *old_head;
bool was_frozen, was_full;
struct slab new;
struct freelist_counters new;
unsigned long counters;
struct kmem_cache_node *n = NULL;
unsigned long flags;