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authorHugh Dickins <hugh@veritas.com>2009-01-06 14:39:41 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-06 15:59:04 -0800
commitb962716b459505a8d83aea313fea0abe76749f42 (patch)
treeb401e882f2ee8ff5a11209057496e603c211e8fe /mm/swapfile.c
parent60371d971a3d01afd102f0bbf2681f32ecc31d78 (diff)
downloadop-kernel-dev-b962716b459505a8d83aea313fea0abe76749f42.zip
op-kernel-dev-b962716b459505a8d83aea313fea0abe76749f42.tar.gz
mm: optimize get_scan_ratio for no swap
Rik suggests a simplified get_scan_ratio() for !CONFIG_SWAP. Yes, the gcc optimizer gives us that, when nr_swap_pages is #defined as 0L. Move usual declaration to swapfile.c: it never belonged in page_alloc.c. Signed-off-by: Hugh Dickins <hugh@veritas.com> Cc: Lee Schermerhorn <lee.schermerhorn@hp.com> Acked-by: Rik van Riel <riel@redhat.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Robin Holt <holt@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/swapfile.c')
-rw-r--r--mm/swapfile.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/swapfile.c b/mm/swapfile.c
index 9ce7f81..725e56c 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -35,6 +35,7 @@
static DEFINE_SPINLOCK(swap_lock);
static unsigned int nr_swapfiles;
+long nr_swap_pages;
long total_swap_pages;
static int swap_overflow;
static int least_priority;
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