From d64dcbd183abab251beb0fa0acd81a772a09887e Mon Sep 17 00:00:00 2001 From: Gu Jinxiang Date: Thu, 12 Jul 2018 14:23:15 +0800 Subject: [PATCH] btrfs: make fs_devices a local variable in btrfs_parse_early_options fs_devices is always passed to btrfs_scan_one_device which overrides it. In the call stack below fs_devices is passed to btrfs_scan_one_device from btrfs_mount_root. In btrfs_mount_root the output fs_devices of this call stack is not used. btrfs_mount_root btrfs_parse_early_options btrfs_scan_one_device So, it is not necessary to pass fs_devices from btrfs_mount_root, using a local variable in btrfs_parse_early_options is enough. Signed-off-by: Gu Jinxiang Reviewed-by: Anand Jain Reviewed-by: Nikolay Borisov Reviewed-by: David Sterba Signed-off-by: David Sterba --- fs/btrfs/super.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 28ab75ebb983..909ea2564e84 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -884,10 +884,11 @@ out: * only when we need to allocate a new super block. */ static int btrfs_parse_early_options(const char *options, fmode_t flags, - void *holder, struct btrfs_fs_devices **fs_devices) + void *holder) { substring_t args[MAX_OPT_ARGS]; char *device_name, *opts, *orig, *p; + struct btrfs_fs_devices *fs_devices = NULL; int error = 0; lockdep_assert_held(&uuid_mutex); @@ -918,7 +919,7 @@ static int btrfs_parse_early_options(const char *options, fmode_t flags, goto out; } error = btrfs_scan_one_device(device_name, - flags, holder, fs_devices); + flags, holder, &fs_devices); kfree(device_name); if (error) goto out; @@ -1554,7 +1555,7 @@ static struct dentry *btrfs_mount_root(struct file_system_type *fs_type, } mutex_lock(&uuid_mutex); - error = btrfs_parse_early_options(data, mode, fs_type, &fs_devices); + error = btrfs_parse_early_options(data, mode, fs_type); if (error) { mutex_unlock(&uuid_mutex); goto error_fs_info;