From ca891f41c4c7921a03dfd0fa1faf324393724480 Mon Sep 17 00:00:00 2001 From: "Matthew Wilcox (Oracle)" Date: Mon, 28 Jun 2021 19:41:22 -0700 Subject: mm: constify get_pfnblock_flags_mask and get_pfnblock_migratetype The struct page is not modified by these routines, so it can be marked const. Link: https://lkml.kernel.org/r/20210416231531.2521383-6-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Vlastimil Babka Reviewed-by: Anshuman Khandual Reviewed-by: William Kucharski Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/page_alloc.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) (limited to 'mm/page_alloc.c') diff --git a/mm/page_alloc.c b/mm/page_alloc.c index ea1efbb06e40..4f5eedb6593a 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -474,7 +474,7 @@ static inline bool defer_init(int nid, unsigned long pfn, unsigned long end_pfn) #endif /* Return a pointer to the bitmap storing bits affecting a block of pages */ -static inline unsigned long *get_pageblock_bitmap(struct page *page, +static inline unsigned long *get_pageblock_bitmap(const struct page *page, unsigned long pfn) { #ifdef CONFIG_SPARSEMEM @@ -484,7 +484,7 @@ static inline unsigned long *get_pageblock_bitmap(struct page *page, #endif /* CONFIG_SPARSEMEM */ } -static inline int pfn_to_bitidx(struct page *page, unsigned long pfn) +static inline int pfn_to_bitidx(const struct page *page, unsigned long pfn) { #ifdef CONFIG_SPARSEMEM pfn &= (PAGES_PER_SECTION-1); @@ -495,7 +495,7 @@ static inline int pfn_to_bitidx(struct page *page, unsigned long pfn) } static __always_inline -unsigned long __get_pfnblock_flags_mask(struct page *page, +unsigned long __get_pfnblock_flags_mask(const struct page *page, unsigned long pfn, unsigned long mask) { @@ -520,13 +520,14 @@ unsigned long __get_pfnblock_flags_mask(struct page *page, * * Return: pageblock_bits flags */ -unsigned long get_pfnblock_flags_mask(struct page *page, unsigned long pfn, - unsigned long mask) +unsigned long get_pfnblock_flags_mask(const struct page *page, + unsigned long pfn, unsigned long mask) { return __get_pfnblock_flags_mask(page, pfn, mask); } -static __always_inline int get_pfnblock_migratetype(struct page *page, unsigned long pfn) +static __always_inline int get_pfnblock_migratetype(const struct page *page, + unsigned long pfn) { return __get_pfnblock_flags_mask(page, pfn, MIGRATETYPE_MASK); } -- cgit v1.2.3