The patch titled
mm: make some struct page's const
has been added to the -mm tree. Its filename is
mm-make-some-struct-pages-const.patch
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------------------------------------------------------
Subject: mm: make some struct page's const
From: Ian Campbell <ian.campbell@xxxxxxxxxx>
These uses are read-only and in a subsequent patch I have a const struct
page in my hand...
Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Mel Gorman <mel@xxxxxxxxx>
Cc: Michel Lespinasse <walken@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/mm.h | 10 +++++-----
mm/sparse.c | 2 +-
2 files changed, 6 insertions(+), 6 deletions(-)
diff -puN include/linux/mm.h~mm-make-some-struct-pages-const include/linux/mm.h
--- a/include/linux/mm.h~mm-make-some-struct-pages-const
+++ a/include/linux/mm.h
@@ -636,7 +636,7 @@ static inline pte_t maybe_mkwrite(pte_t
#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 zon
}
#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
*/
#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 -puN mm/sparse.c~mm-make-some-struct-pages-const mm/sparse.c
--- a/mm/sparse.c~mm-make-some-struct-pages-const
+++ a/mm/sparse.c
@@ -40,7 +40,7 @@ static u8 section_to_node_table[NR_MEM_S
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)];
}
_
Patches currently in -mm which might be from ian.campbell@xxxxxxxxxx are
mm-make-some-struct-pages-const.patch
mm-use-const-struct-page-for-r-o-page-flag-accessor-methods.patch
linux-next.patch
mm-extend-memory-hotplug-api-to-allow-memory-hotplug-in-virtual-machines.patch
mm-extend-memory-hotplug-api-to-allow-memory-hotplug-in-virtual-machines-fix.patch
xen-balloon-memory-hotplug-support-for-xen-balloon-driver.patch
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