diff options
| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2021-06-28 19:41:25 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-06-29 10:53:53 -0700 |
| commit | 5f7dadf3958f882b393d3c4c60da232dbac66424 (patch) | |
| tree | 5f09abec99c72ce914531310b9e696a8afd45687 /include/linux/page_ref.h | |
| parent | ca891f41c4c7921a03dfd0fa1faf324393724480 (diff) | |
mm: constify page_count and page_ref_count
Now that compound_head() accepts a const struct page pointer, these two
functions can be marked as not modifying the page pointer they are passed.
Link: https://lkml.kernel.org/r/20210416231531.2521383-7-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Reviewed-by: William Kucharski <william.kucharski@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/page_ref.h')
| -rw-r--r-- | include/linux/page_ref.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/page_ref.h b/include/linux/page_ref.h index f3318f34fc54..7ad46f45df39 100644 --- a/include/linux/page_ref.h +++ b/include/linux/page_ref.h @@ -62,12 +62,12 @@ static inline void __page_ref_unfreeze(struct page *page, int v) #endif -static inline int page_ref_count(struct page *page) +static inline int page_ref_count(const struct page *page) { return atomic_read(&page->_refcount); } -static inline int page_count(struct page *page) +static inline int page_count(const struct page *page) { return atomic_read(&compound_head(page)->_refcount); } |