[PATCH 01/13] mm: Make some struct page's const.
From: Ian Campbell <hidden>
Date: 2011-07-22 13:17:43
Also in:
linux-mm, linux-nfs, lkml
Subsystem:
memory management, memory management - core, the rest · Maintainers:
Andrew Morton, David Hildenbrand, Linus Torvalds
These uses are read-only and in a subsequent patch I have a const struct page in my hand... Signed-off-by: Ian Campbell <redacted> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Rik van Riel <redacted> Cc: Andrea Arcangeli <redacted> Cc: Mel Gorman <redacted> Cc: Michel Lespinasse <redacted> Cc: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org --- include/linux/mm.h | 10 +++++----- mm/sparse.c | 2 +- 2 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 9670f71..550ec8f 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h@@ -636,7 +636,7 @@ 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; }
@@ -664,15 +664,15 @@ 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)]; }
@@ -717,7 +717,7 @@ 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))); }
diff --git a/mm/sparse.c b/mm/sparse.c
index aa64b12..858e1df 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c@@ -40,7 +40,7 @@ static u8 section_to_node_table[NR_MEM_SECTIONS] __cacheline_aligned; static u16 section_to_node_table[NR_MEM_SECTIONS] __cacheline_aligned; #endif -int page_to_nid(struct page *page) +int page_to_nid(const struct page *page) { return section_to_node_table[page_to_section(page)]; }
--
1.7.2.5
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