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| author | Hugh Dickins <hugh.dickins@tiscali.co.uk> | 2009-09-21 17:03:35 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-22 07:17:41 -0700 |
| commit | 03f6462a3ae78f36eb1f0ee8b4d5ae2f7859c1d5 (patch) | |
| tree | bf19c5019705796e90ef592233aca5f09025a92f /mm/internal.h | |
| parent | 62eede62dafb4a6633eae7ffbeb34c60dba5e7b1 (diff) | |
| download | linux-03f6462a3ae78f36eb1f0ee8b4d5ae2f7859c1d5.tar.gz | |
mm: move highest_memmap_pfn
Move highest_memmap_pfn __read_mostly from page_alloc.c next to zero_pfn __read_mostly in memory.c: to help them share a cacheline, since they're very often tested together in vm_normal_page(). Signed-off-by: Hugh Dickins <hugh.dickins@tiscali.co.uk> Cc: Rik van Riel <riel@redhat.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Nick Piggin <npiggin@suse.de> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Minchan Kim <minchan.kim@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/internal.h')
| -rw-r--r-- | mm/internal.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/mm/internal.h b/mm/internal.h index 75596574911e..22ec8d2b0fb8 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -37,6 +37,8 @@ static inline void __put_page(struct page *page) atomic_dec(&page->_count); } +extern unsigned long highest_memmap_pfn; + /* * in mm/vmscan.c: */ @@ -46,7 +48,6 @@ extern void putback_lru_page(struct page *page); /* * in mm/page_alloc.c */ -extern unsigned long highest_memmap_pfn; extern void __free_pages_bootmem(struct page *page, unsigned int order); extern void prep_compound_page(struct page *page, unsigned long order); |