From: David Sterba <dsterba@suse.com>
Date: Thu, 22 Jun 2017 02:26:54 +0200
Subject: btrfs: use GFP_KERNEL in mount and remount
Git-commit: 3ec836211183eee87609f832a949dfe711af2b5a
Patch-mainline: v4.14-rc1
References: bsc#1062897

We don't need to restrict the allocation flags in btrfs_mount or
_remount. No big filesystem locks are held (possibly s_umount but that
does no count here).

Signed-off-by: David Sterba <dsterba@suse.com>
Acked-by: Libor Pechacek <lpechacek@suse.com>

---
 fs/btrfs/super.c |   15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -429,7 +429,7 @@ int btrfs_parse_options(struct btrfs_fs_
 	 * strsep changes the string, duplicate it because parse_options
 	 * gets called twice
 	 */
-	options = kstrdup(options, GFP_NOFS);
+	options = kstrdup(options, GFP_KERNEL);
 	if (!options)
 		return -ENOMEM;
 
@@ -973,7 +973,7 @@ static char *get_subvol_name_from_object
 	}
 	path->leave_spinning = 1;
 
-	name = kmalloc(PATH_MAX, GFP_NOFS);
+	name = kmalloc(PATH_MAX, GFP_KERNEL);
 	if (!name) {
 		ret = -ENOMEM;
 		goto err;
@@ -1362,10 +1362,11 @@ static char *setup_root_args(char *args)
 	char *buf, *dst, *sep;
 
 	if (!args)
-		return kstrdup("subvolid=0", GFP_NOFS);
+		return kstrdup("subvolid=0", GFP_KERNEL);
 
 	/* The worst case is that we add ",subvolid=0" to the end. */
-	buf = dst = kmalloc(strlen(args) + strlen(",subvolid=0") + 1, GFP_NOFS);
+	buf = dst = kmalloc(strlen(args) + strlen(",subvolid=0") + 1,
+			GFP_KERNEL);
 	if (!buf)
 		return NULL;
 
@@ -1617,7 +1618,7 @@ static struct dentry *btrfs_mount(struct
 	 * it for searching for existing supers, so this lets us do that and
 	 * then open_ctree will properly initialize everything later.
 	 */
-	fs_info = kzalloc(sizeof(struct btrfs_fs_info), GFP_NOFS);
+	fs_info = kzalloc(sizeof(struct btrfs_fs_info), GFP_KERNEL);
 	if (!fs_info) {
 		error = -ENOMEM;
 		goto error_sec_opts;
@@ -1625,8 +1626,8 @@ static struct dentry *btrfs_mount(struct
 
 	fs_info->fs_devices = fs_devices;
 
-	fs_info->super_copy = kzalloc(BTRFS_SUPER_INFO_SIZE, GFP_NOFS);
-	fs_info->super_for_commit = kzalloc(BTRFS_SUPER_INFO_SIZE, GFP_NOFS);
+	fs_info->super_copy = kzalloc(BTRFS_SUPER_INFO_SIZE, GFP_KERNEL);
+	fs_info->super_for_commit = kzalloc(BTRFS_SUPER_INFO_SIZE, GFP_KERNEL);
 	security_init_mnt_opts(&fs_info->security_opts);
 	if (!fs_info->super_copy || !fs_info->super_for_commit) {
 		error = -ENOMEM;