memstick: remove mspro_block_mutex
mspro_block_mutex is identical in scope to mspro_block_disk_lock and therefore unnecessary. Signed-off-by: Alex Dubov <oakad@yahoo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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