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authorIan Campbell <ian.campbell@citrix.com>2011-08-17 20:40:33 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2011-08-18 00:00:20 +0400
commitaa462abe8aaf2198d6aef97da20c874ac694a39f (patch)
treef7c1b4e82fe8eeaad8ce61a5e9e4d301accaf32b /include/linux/mm.h
parentf991879473828f320a714e9494fb37a26ccd6b66 (diff)
downloadlinux-aa462abe8aaf2198d6aef97da20c874ac694a39f.tar.xz
mm: fix __page_to_pfn for a const struct page argument
This allows the cast in lowmem_page_address (introduced as a warning fixup to 33dd4e0ec911 "mm: make some struct page's const") to be removed. Propagate const'ness to page_to_section() as well since it is required by __page_to_pfn. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Acked-by: Rik van Riel <riel@redhat.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Michel Lespinasse <walken@google.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: 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.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index c06454d60a3d..7438071b44aa 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -685,7 +685,7 @@ static inline void set_page_section(struct page *page, unsigned long section)
page->flags |= (section & SECTIONS_MASK) << SECTIONS_PGSHIFT;
}
-static inline unsigned long page_to_section(struct page *page)
+static inline unsigned long page_to_section(const struct page *page)
{
return (page->flags >> SECTIONS_PGSHIFT) & SECTIONS_MASK;
}
@@ -720,7 +720,7 @@ static inline void set_page_links(struct page *page, enum zone_type zone,
static __always_inline void *lowmem_page_address(const struct page *page)
{
- return __va(PFN_PHYS(page_to_pfn((struct page *)page)));
+ return __va(PFN_PHYS(page_to_pfn(page)));
}
#if defined(CONFIG_HIGHMEM) && !defined(WANT_PAGE_VIRTUAL)