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mm: mass constification of folio/page pointers

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Now that page_pgoff() takes const pointers, we can constify the pointers
to a lot of functions.

Link: https://lkml.kernel.org/r/20241005200121.3231142-5-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle)
2024-10-05 21:01:15 +01:00
committed by Andrew Morton
parent 713da0b33b
commit 68158bfa3d
7 changed files with 37 additions and 30 deletions
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include/linux/rmap.h
+5 -5
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@@ -171,7 +171,7 @@ static inline void anon_vma_merge(struct vm_area_struct *vma,
unlink_anon_vmas(next);
}
struct anon_vma *folio_get_anon_vma(struct folio *folio);
struct anon_vma *folio_get_anon_vma(const struct folio *folio);
/* RMAP flags, currently only relevant for some anon rmap operations. */
typedef int __bitwise rmap_t;
@@ -194,8 +194,8 @@ enum rmap_level {
RMAP_LEVEL_PMD,
};
static inline void __folio_rmap_sanity_checks(struct folio *folio,
struct page *page, int nr_pages, enum rmap_level level)
static inline void __folio_rmap_sanity_checks(const struct folio *folio,
const struct page *page, int nr_pages, enum rmap_level level)
{
/* hugetlb folios are handled separately. */
VM_WARN_ON_FOLIO(folio_test_hugetlb(folio), folio);
@@ -771,14 +771,14 @@ struct rmap_walk_control {
bool (*rmap_one)(struct folio *folio, struct vm_area_struct *vma,
unsigned long addr, void *arg);
int (*done)(struct folio *folio);
struct anon_vma *(*anon_lock)(struct folio *folio,
struct anon_vma *(*anon_lock)(const struct folio *folio,
struct rmap_walk_control *rwc);
bool (*invalid_vma)(struct vm_area_struct *vma, void *arg);
};
void rmap_walk(struct folio *folio, struct rmap_walk_control *rwc);
void rmap_walk_locked(struct folio *folio, struct rmap_walk_control *rwc);
struct anon_vma *folio_lock_anon_vma_read(struct folio *folio,
struct anon_vma *folio_lock_anon_vma_read(const struct folio *folio,
struct rmap_walk_control *rwc);
#else /* !CONFIG_MMU */