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| author |   Matthew Wilcox (Oracle) <willy@infradead.org> | 2021-06-28 19:41:22 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2021-06-29 10:53:53 -0700 |
| commit | ca891f41c4c7921a03dfd0fa1faf324393724480 (patch) | |
| tree | 64ad2c7daa9c74f4e43d4cd85366278baab66533 /mm | |
| parent | mm: make compound_head const-preserving (diff) | |
| download | linux-dev-ca891f41c4c7921a03dfd0fa1faf324393724480.tar.xz linux-dev-ca891f41c4c7921a03dfd0fa1faf324393724480.zip | |
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) <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 'mm')
| -rw-r--r-- | mm/page_alloc.c | 13 |
1 files changed, 7 insertions, 6 deletions
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); } |