ext4: unregister features interface on module unload
Ext4 features interface was not properly unregistered which led to problems while unloading/reloading ext4 module. This commit fixes that by adding proper kobject unregistration code into ext4_exit_fs() as well as fail-path of ext4_init_fs() Reported-by: NEric Sandeen <sandeen@redhat.com> Signed-off-by: NLukas Czerner <lczerner@redhat.com> Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu> Cc: stable@kernel.org
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