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btrfs: Remove redundant local zero structure

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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>
This commit is contained in:
Dulshani Gunawardhana 2013-10-31 10:29:38 +05:30 committed by Chris Mason
parent 3c45bfc152
commit b19e684393
1 changed files with 2 additions and 3 deletions
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5
fs/btrfs/ioctl.c
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@ -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,