Messages in this thread Patch in this message | | | From | "Matthew Wilcox (Oracle)" <> | Subject | [PATCH 6/6] mm: Constify page_count and page_ref_count | Date | Sat, 17 Apr 2021 00:15:31 +0100 |
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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.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> --- include/linux/page_ref.h | 4 ++-- 1 file 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); } -- 2.30.2
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