tree ae83a5c9f212e85db4dbd00279880a6ce24f575d
parent f4b554af9931585174d4913b482eacab75858964
author Oleg Nesterov <oleg@redhat.com> 1439303309 +0200
committer Oleg Nesterov <oleg@redhat.com> 1439639529 +0200

document rwsem_release() in sb_wait_write()

Not only we need to avoid the warning from lockdep_sys_exit(), the
caller of freeze_super() can never release this lock. Another thread
can do this, so there is another reason for rwsem_release().

Plus the comment should explain why we have to fool lockdep.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: Jan Kara <jack@suse.com>