From b19e684393752ec129a36924e6c270daf79676d6 Mon Sep 17 00:00:00 2001
From: Dulshani Gunawardhana <dulshani.gunawardhana89@gmail.com>
Date: Thu, 31 Oct 2013 10:29:38 +0530
Subject: btrfs: Remove redundant local zero structure
Remove redundant local zero structure, replacing it by the kernel's
global ZERO_PAGE.
Signed-off-by: Dulshani Gunawardhana <dulshani.gunawardhana89@gmail.com>
Reviewed-by: Zach Brown <zab@redhat.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
---
fs/btrfs/ioctl.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
(limited to 'fs')
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 9ea05506cb84..78d20482b72a 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -368,9 +368,8 @@ static noinline int btrfs_ioctl_fitrim(struct file *file, void __user *arg)
int btrfs_is_empty_uuid(u8 *uuid)
{
- static char empty_uuid[BTRFS_UUID_SIZE] = {0};
-
- return !memcmp(uuid, empty_uuid, BTRFS_UUID_SIZE);
+ BUILD_BUG_ON(BTRFS_UUID_SIZE > PAGE_SIZE);
+ return !memcmp(uuid, empty_zero_page, BTRFS_UUID_SIZE);
}
static noinline int create_subvol(struct inode *dir,
--
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