From 4c84cacfa424264f7ad5287298d3ea4a3e935278 Mon Sep 17 00:00:00 2001
From: Nick Piggin <npiggin@suse.de>
Date: Wed, 22 Mar 2006 00:08:00 -0800
Subject: [PATCH] [PATCH] mm: PageActive no testset
PG_active is protected by zone->lru_lock, it does not need TestSet/TestClear
operations.
Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
include/linux/page-flags.h | 2 --
mm/swap.c | 4 ++--
mm/vmscan.c | 5 +++--
3 files changed, 5 insertions(+), 6 deletions(-)
diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index 58856c823f8b6..5d1e7bd851075 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -246,8 +246,6 @@ extern void __mod_page_state_offset(unsigned long offset, unsigned long delta);
#define PageActive(page) test_bit(PG_active, &(page)->flags)
#define SetPageActive(page) set_bit(PG_active, &(page)->flags)
#define ClearPageActive(page) clear_bit(PG_active, &(page)->flags)
-#define TestClearPageActive(page) test_and_clear_bit(PG_active, &(page)->flags)
-#define TestSetPageActive(page) test_and_set_bit(PG_active, &(page)->flags)
#define PageSlab(page) test_bit(PG_slab, &(page)->flags)
#define SetPageSlab(page) set_bit(PG_slab, &(page)->flags)
diff --git a/mm/swap.c b/mm/swap.c
index 985324ee93688..cf88226cf96de 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -374,8 +374,8 @@ void __pagevec_lru_add_active(struct pagevec *pvec)
}
BUG_ON(PageLRU(page));
SetPageLRU(page);
- if (TestSetPageActive(page))
- BUG();
+ BUG_ON(PageActive(page));
+ SetPageActive(page);
add_page_to_active_list(zone, page);
}
if (zone)
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 40fb37828e8c4..8e477b1a48380 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1280,8 +1280,9 @@ refill_inactive_zone(struct zone *zone, struct scan_control *sc)
prefetchw_prev_lru_page(page, &l_inactive, flags);
BUG_ON(PageLRU(page));
SetPageLRU(page);
- if (!TestClearPageActive(page))
- BUG();
+ BUG_ON(!PageActive(page));
+ ClearPageActive(page);
+
list_move(&page->lru, &zone->inactive_list);
pgmoved++;
if (!pagevec_add(&pvec, page)) {
--
GitLab