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authorMatthew Wilcox (Oracle) <willy@infradead.org>2021-06-29 04:41:22 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2021-06-29 19:53:53 +0200
commitca891f41c4c7921a03dfd0fa1faf324393724480 (patch)
tree64ad2c7daa9c74f4e43d4cd85366278baab66533 /mm
parentmm: make compound_head const-preserving (diff)
downloadlinux-ca891f41c4c7921a03dfd0fa1faf324393724480.tar.xz
linux-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.c13
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);
}