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0900beae17
Currently init_lock only prevents concurrent execution of zram_init_device() and zram_reset_device() but not zram_make_request() nor sysfs store functions. This patch changes init_lock into a rw_semaphore. A write lock is taken by init, reset and store functions, a read lock is taken by zram_make_request(). Also, avoids to release the lock before calling __zram_reset_device() for cleaning after a failed init, thus preventing any concurrent task to see an inconsistent state of zram. Signed-off-by: Jerome Marchand <jmarchan@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>