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>

1 files changed, 3 insertions, 2 deletions

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 */
 };