linux-kernel - [PATCH 03/11] zcache: The last of the atomic reads has now an accessory function.

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Message-Id: <1352920339-10183-4-git-send-email-konrad.wilk@oracle.com>
Date:	Wed, 14 Nov 2012 14:12:11 -0500
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	sjenning@...ux.vnet.ibm.com, dan.magenheimer@...cle.com,
	devel@...uxdriverproject.org, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, ngupta@...are.org, minchan@...nel.org,
	akpm@...ux-foundation.org, mgorman@...e.de
Cc:	fschmaus@...il.com, andor.daam@...glemail.com,
	ilendir@...glemail.com,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Subject: [PATCH 03/11] zcache: The last of the atomic reads has now an accessory function.

And now we can move the code to its own file.

Reviewed-by: Dan Magenheimer <dan.magenheimer@...cle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
---
 drivers/staging/ramster/zcache-main.c |   13 +++++++++----
 1 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/ramster/zcache-main.c b/drivers/staging/ramster/zcache-main.c
index 99dc045..9e6b6d3 100644
--- a/drivers/staging/ramster/zcache-main.c
+++ b/drivers/staging/ramster/zcache-main.c
@@ -252,6 +252,14 @@ static inline void dec_zcache_pers_zpages(unsigned zpages)
 {
 	zcache_pers_zpages = atomic_sub_return(zpages, &zcache_pers_zpages_atomic);
 }
+
+static inline unsigned long curr_pageframes_count(void)
+{
+	return zcache_pageframes_alloced -
+		atomic_read(&zcache_pageframes_freed_atomic) -
+		atomic_read(&zcache_eph_pageframes_atomic) -
+		atomic_read(&zcache_pers_pageframes_atomic);
+};
 /* but for the rest of these, counting races are ok */
 static unsigned long zcache_flush_total;
 static unsigned long zcache_flush_found;
@@ -551,10 +559,7 @@ static void zcache_free_page(struct page *page)
 		BUG();
 	__free_page(page);
 	inc_zcache_pageframes_freed();
-	curr_pageframes = zcache_pageframes_alloced -
-			atomic_read(&zcache_pageframes_freed_atomic) -
-			atomic_read(&zcache_eph_pageframes_atomic) -
-			atomic_read(&zcache_pers_pageframes_atomic);
+	curr_pageframes = curr_pageframes_count();
 	if (curr_pageframes > max_pageframes)
 		max_pageframes = curr_pageframes;
 	if (curr_pageframes < min_pageframes)
-- 
1.7.7.6

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