From dc4b0caff24d9b2918e9f27bc65499ee63187eba Mon Sep 17 00:00:00 2001
From: Mel Gorman <mgorman@suse.de>
Date: Wed, 4 Jun 2014 16:10:17 -0700
Subject: mm: page_alloc: reduce number of times page_to_pfn is called

In the free path we calculate page_to_pfn multiple times. Reduce that.

Signed-off-by: Mel Gorman <mgorman@suse.de>
Acked-by: Rik van Riel <riel@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Jan Kara <jack@suse.cz>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Hugh Dickins <hughd@google.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 include/linux/pageblock-flags.h | 33 +++++++++++++--------------------
 1 file changed, 13 insertions(+), 20 deletions(-)

(limited to 'include/linux/pageblock-flags.h')

diff --git a/include/linux/pageblock-flags.h b/include/linux/pageblock-flags.h
index c08730c10c7a..2baeee12f48e 100644
--- a/include/linux/pageblock-flags.h
+++ b/include/linux/pageblock-flags.h
@@ -65,33 +65,26 @@ extern int pageblock_order;
 /* Forward declaration */
 struct page;
 
-unsigned long get_pageblock_flags_mask(struct page *page,
+unsigned long get_pfnblock_flags_mask(struct page *page,
+				unsigned long pfn,
 				unsigned long end_bitidx,
 				unsigned long mask);
-void set_pageblock_flags_mask(struct page *page,
+
+void set_pfnblock_flags_mask(struct page *page,
 				unsigned long flags,
+				unsigned long pfn,
 				unsigned long end_bitidx,
 				unsigned long mask);
 
 /* Declarations for getting and setting flags. See mm/page_alloc.c */
-static inline unsigned long get_pageblock_flags_group(struct page *page,
-					int start_bitidx, int end_bitidx)
-{
-	unsigned long nr_flag_bits = end_bitidx - start_bitidx + 1;
-	unsigned long mask = (1 << nr_flag_bits) - 1;
-
-	return get_pageblock_flags_mask(page, end_bitidx, mask);
-}
-
-static inline void set_pageblock_flags_group(struct page *page,
-					unsigned long flags,
-					int start_bitidx, int end_bitidx)
-{
-	unsigned long nr_flag_bits = end_bitidx - start_bitidx + 1;
-	unsigned long mask = (1 << nr_flag_bits) - 1;
-
-	set_pageblock_flags_mask(page, flags, end_bitidx, mask);
-}
+#define get_pageblock_flags_group(page, start_bitidx, end_bitidx) \
+	get_pfnblock_flags_mask(page, page_to_pfn(page),		\
+			end_bitidx,					\
+			(1 << (end_bitidx - start_bitidx + 1)) - 1)
+#define set_pageblock_flags_group(page, flags, start_bitidx, end_bitidx) \
+	set_pfnblock_flags_mask(page, flags, page_to_pfn(page),		\
+			end_bitidx,					\
+			(1 << (end_bitidx - start_bitidx + 1)) - 1)
 
 #ifdef CONFIG_COMPACTION
 #define get_pageblock_skip(page) \
-- 
cgit v1.2.3-59-g8ed1b