btrfs: sysfs label interface should check for read only FS
Not sure how this escaped many eyes so far Signed-off-by:Anand Jain <anand.jain@oracle.com> Signed-off-by:
Chris Mason <clm@fb.com>
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Not sure how this escaped many eyes so far Signed-off-by:Anand Jain <anand.jain@oracle.com> Signed-off-by:
Chris Mason <clm@fb.com>