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| author | Ian Campbell <ian.campbell@citrix.com> | 2011-07-26 04:11:51 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-07-26 07:57:07 +0400 |
| commit | 33dd4e0ec91138c3d80e790c08a3db47426c81f2 (patch) | |
| tree | 5b244874a004cc8a34033846f4e504c9306bf025 /include/linux/mm.h | |
| parent | ee8f248d266ec6966c0ce6b7dec24de43dcc1b58 (diff) | |
| download | linux-33dd4e0ec91138c3d80e790c08a3db47426c81f2.tar.xz | |
mm: make some struct page's const
These uses are read-only and in a subsequent patch I have a const struct
page in my hand...
[akpm@linux-foundation.org: fix warnings in lowmem_page_address()]
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Michel Lespinasse <walken@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/mm.h')
| -rw-r--r-- | include/linux/mm.h | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index 8a45ad22a170..6321e840e21d 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -637,7 +637,7 @@ static inline pte_t maybe_mkwrite(pte_t pte, struct vm_area_struct *vma) #define SECTIONS_MASK ((1UL << SECTIONS_WIDTH) - 1) #define ZONEID_MASK ((1UL << ZONEID_SHIFT) - 1) -static inline enum zone_type page_zonenum(struct page *page) +static inline enum zone_type page_zonenum(const struct page *page) { return (page->flags >> ZONES_PGSHIFT) & ZONES_MASK; } @@ -665,15 +665,15 @@ static inline int zone_to_nid(struct zone *zone) } #ifdef NODE_NOT_IN_PAGE_FLAGS -extern int page_to_nid(struct page *page); +extern int page_to_nid(const struct page *page); #else -static inline int page_to_nid(struct page *page) +static inline int page_to_nid(const struct page *page) { return (page->flags >> NODES_PGSHIFT) & NODES_MASK; } #endif -static inline struct zone *page_zone(struct page *page) +static inline struct zone *page_zone(const struct page *page) { return &NODE_DATA(page_to_nid(page))->node_zones[page_zonenum(page)]; } @@ -718,9 +718,9 @@ static inline void set_page_links(struct page *page, enum zone_type zone, */ #include <linux/vmstat.h> -static __always_inline void *lowmem_page_address(struct page *page) +static __always_inline void *lowmem_page_address(const struct page *page) { - return __va(PFN_PHYS(page_to_pfn(page))); + return __va(PFN_PHYS(page_to_pfn((struct page *)page))); } #if defined(CONFIG_HIGHMEM) && !defined(WANT_PAGE_VIRTUAL) |