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mm: Reduce the number of slab->folio casts

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Mark a few more folio functions as taking a const folio pointer, which
allows us to remove a few places in slab which cast away the const.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
This commit is contained in:
Matthew Wilcox (Oracle) 2024-05-31 13:29:02 +01:00 committed by Vlastimil Babka
parent a0a44d9175
commit 4d2bcefa96
3 changed files with 7 additions and 9 deletions
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6
include/linux/mm.h
View File

@ -1105,7 +1105,7 @@ static inline unsigned int compound_order(struct page *page)
*
* Return: The order of the folio.
*/
static inline unsigned int folio_order(struct folio *folio)
static inline unsigned int folio_order(const struct folio *folio)
{
if (!folio_test_large(folio))
return 0;
@ -2145,7 +2145,7 @@ static inline struct folio *folio_next(struct folio *folio)
* it from being split. It is not necessary for the folio to be locked.
* Return: The base-2 logarithm of the size of this folio.
*/
static inline unsigned int folio_shift(struct folio *folio)
static inline unsigned int folio_shift(const struct folio *folio)
{
return PAGE_SHIFT + folio_order(folio);
}
@ -2158,7 +2158,7 @@ static inline unsigned int folio_shift(struct folio *folio)
* it from being split. It is not necessary for the folio to be locked.
* Return: The number of bytes in this folio.
*/
static inline size_t folio_size(struct folio *folio)
static inline size_t folio_size(const struct folio *folio)
{
return PAGE_SIZE << folio_order(folio);
}

4
mm/slab.h
View File

@ -166,7 +166,7 @@ static_assert(IS_ALIGNED(offsetof(struct slab, freelist), sizeof(freelist_aba_t)
*/
static inline bool slab_test_pfmemalloc(const struct slab *slab)
{
return folio_test_active((struct folio *)slab_folio(slab));
return folio_test_active(slab_folio(slab));
}
static inline void slab_set_pfmemalloc(struct slab *slab)
@ -211,7 +211,7 @@ static inline struct slab *virt_to_slab(const void *addr)
static inline int slab_order(const struct slab *slab)
{
return folio_order((struct folio *)slab_folio(slab));
return folio_order(slab_folio(slab));
}
static inline size_t slab_size(const struct slab *slab)

6
mm/slub.c
View File

@ -962,11 +962,9 @@ void print_tracking(struct kmem_cache *s, void *object)
static void print_slab_info(const struct slab *slab)
{
struct folio *folio = (struct folio *)slab_folio(slab);
pr_err("Slab 0x%p objects=%u used=%u fp=0x%p flags=%pGp\n",
slab, slab->objects, slab->inuse, slab->freelist,
folio_flags(folio, 0));
&slab->__page_flags);
}
/*
@ -2532,7 +2530,7 @@ static void discard_slab(struct kmem_cache *s, struct slab *slab)
*/
static inline bool slab_test_node_partial(const struct slab *slab)
{
return folio_test_workingset((struct folio *)slab_folio(slab));
return folio_test_workingset(slab_folio(slab));
}
static inline void slab_set_node_partial(struct slab *slab)