btrfs: constify device path passed to relevant helpers
Signed-off-by: David Sterba <dsterba@suse.com>
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 1fac987..b443cc7 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -1725,7 +1725,7 @@ static int btrfs_add_device(struct btrfs_trans_handle *trans,
* Function to update ctime/mtime for a given device path.
* Mainly used for ctime/mtime based probe like libblkid.
*/
-static void update_dev_time(char *path_name)
+static void update_dev_time(const char *path_name)
{
struct file *filp;
@@ -1851,7 +1851,8 @@ void btrfs_assign_next_active_device(struct btrfs_fs_info *fs_info,
fs_info->fs_devices->latest_bdev = next_device->bdev;
}
-int btrfs_rm_device(struct btrfs_fs_info *fs_info, char *device_path, u64 devid)
+int btrfs_rm_device(struct btrfs_fs_info *fs_info, const char *device_path,
+ u64 devid)
{
struct btrfs_device *device;
struct btrfs_fs_devices *cur_devices;
@@ -2091,7 +2092,7 @@ void btrfs_destroy_dev_replace_tgtdev(struct btrfs_fs_info *fs_info,
}
static int btrfs_find_device_by_path(struct btrfs_fs_info *fs_info,
- char *device_path,
+ const char *device_path,
struct btrfs_device **device)
{
int ret = 0;
@@ -2118,7 +2119,7 @@ static int btrfs_find_device_by_path(struct btrfs_fs_info *fs_info,
}
int btrfs_find_device_missing_or_by_path(struct btrfs_fs_info *fs_info,
- char *device_path,
+ const char *device_path,
struct btrfs_device **device)
{
*device = NULL;
@@ -2151,7 +2152,8 @@ int btrfs_find_device_missing_or_by_path(struct btrfs_fs_info *fs_info,
* Lookup a device given by device id, or the path if the id is 0.
*/
int btrfs_find_device_by_devspec(struct btrfs_fs_info *fs_info, u64 devid,
- char *devpath, struct btrfs_device **device)
+ const char *devpath,
+ struct btrfs_device **device)
{
int ret;
@@ -2307,7 +2309,7 @@ static int btrfs_finish_sprout(struct btrfs_trans_handle *trans,
return ret;
}
-int btrfs_init_new_device(struct btrfs_fs_info *fs_info, char *device_path)
+int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path)
{
struct btrfs_root *root = fs_info->dev_root;
struct request_queue *q;
@@ -2515,7 +2517,7 @@ int btrfs_init_new_device(struct btrfs_fs_info *fs_info, char *device_path)
}
int btrfs_init_dev_replace_tgtdev(struct btrfs_fs_info *fs_info,
- char *device_path,
+ const char *device_path,
struct btrfs_device *srcdev,
struct btrfs_device **device_out)
{
@@ -7102,7 +7104,7 @@ int btrfs_get_dev_stats(struct btrfs_fs_info *fs_info,
return 0;
}
-void btrfs_scratch_superblocks(struct block_device *bdev, char *device_path)
+void btrfs_scratch_superblocks(struct block_device *bdev, const char *device_path)
{
struct buffer_head *bh;
struct btrfs_super_block *disk_super;
