From 3e9014b7ae2e05b53552f6524a2efd5d22a20400 Mon Sep 17 00:00:00 2001
From: Nick Piggin <npiggin@suse.de>
Date: Fri, 29 Jan 2010 15:38:29 -0800
Subject: fs-inode_lock-scale-5

Protect inodes_stat statistics with atomic ops rather than inode_lock.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: John Stultz <johnstul@us.ibm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 include/linux/fs.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'include')

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 659579634f9a..fc4222374cd7 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -8,6 +8,7 @@
 
 #include <linux/limits.h>
 #include <linux/ioctl.h>
+#include <asm/atomic.h>
 
 /*
  * It's silly to have NR_OPEN bigger than NR_FILE, but you can change
@@ -39,8 +40,8 @@ struct files_stat_struct {
 };
 
 struct inodes_stat_t {
-	int nr_inodes;
-	int nr_unused;
+	atomic_t nr_inodes;
+	atomic_t nr_unused;
 	int dummy[5];		/* padding for sysctl ABI compatibility */
 };
 
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