linux-kernel - [PATCH v2 03/10] mm: frontswap: split out __frontswap_curr

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1339182919-11432-4-git-send-email-levinsasha928@gmail.com>
Date:	Fri,  8 Jun 2012 21:15:12 +0200
From:	Sasha Levin <levinsasha928@...il.com>
To:	dan.magenheimer@...cle.com, konrad.wilk@...cle.com
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Sasha Levin <levinsasha928@...il.com>
Subject: [PATCH v2 03/10] mm: frontswap: split out __frontswap_curr_pages

Code was duplicated in two functions, clean it up.

Signed-off-by: Sasha Levin <levinsasha928@...il.com>
---
 mm/frontswap.c |   28 +++++++++++++++++-----------
 1 files changed, 17 insertions(+), 11 deletions(-)

diff --git a/mm/frontswap.c b/mm/frontswap.c
index b619d29..37277e6 100644
--- a/mm/frontswap.c
+++ b/mm/frontswap.c
@@ -216,6 +216,20 @@ void __frontswap_invalidate_area(unsigned type)
 }
 EXPORT_SYMBOL(__frontswap_invalidate_area);
 
+static unsigned long __frontswap_curr_pages(void)
+{
+	int type;
+	unsigned long totalpages = 0;
+	struct swap_info_struct *si = NULL;
+
+	lockdep_assert_held(&swap_lock);
+	for (type = swap_list.head; type >= 0; type = si->next) {
+		si = swap_info[type];
+		totalpages += atomic_read(&si->frontswap_pages);
+	}
+	return totalpages;
+}
+
 /*
  * Frontswap, like a true swap device, may unnecessarily retain pages
  * under certain circumstances; "shrink" frontswap is essentially a
@@ -240,11 +254,7 @@ void frontswap_shrink(unsigned long target_pages)
 	 */
 	spin_lock(&swap_lock);
 	locked = true;
-	total_pages = 0;
-	for (type = swap_list.head; type >= 0; type = si->next) {
-		si = swap_info[type];
-		total_pages += atomic_read(&si->frontswap_pages);
-	}
+	total_pages = __frontswap_curr_pages();
 	if (total_pages <= target_pages)
 		goto out;
 	total_pages_to_unuse = total_pages - target_pages;
@@ -282,16 +292,12 @@ EXPORT_SYMBOL(frontswap_shrink);
  */
 unsigned long frontswap_curr_pages(void)
 {
-	int type;
 	unsigned long totalpages = 0;
-	struct swap_info_struct *si = NULL;
 
 	spin_lock(&swap_lock);
-	for (type = swap_list.head; type >= 0; type = si->next) {
-		si = swap_info[type];
-		totalpages += atomic_read(&si->frontswap_pages);
-	}
+	totalpages = __frontswap_curr_pages();
 	spin_unlock(&swap_lock);
+
 	return totalpages;
 }
 EXPORT_SYMBOL(frontswap_curr_pages);
-- 
1.7.8.6

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/