mm: optimize get_scan_ratio for no swap
commitb962716b459505a8d83aea313fea0abe76749f42
authorHugh Dickins <hugh@veritas.com>
Tue, 6 Jan 2009 22:39:41 +0000 (6 14:39 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 6 Jan 2009 23:59:04 +0000 (6 15:59 -0800)
treeb401e882f2ee8ff5a11209057496e603c211e8fe
parent60371d971a3d01afd102f0bbf2681f32ecc31d78
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>
include/linux/swap.h
mm/page_alloc.c
mm/swapfile.c
mm/vmscan.c