percpu-rwsem: kill CONFIG_PERCPU_RWSEM
Remove CONFIG_PERCPU_RWSEM, the next patch adds the unconditional
user of percpu_rw_semaphore.
Signed-off-by: NOleg Nesterov <oleg@redhat.com>
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Remove CONFIG_PERCPU_RWSEM, the next patch adds the unconditional
user of percpu_rw_semaphore.
Signed-off-by: NOleg Nesterov <oleg@redhat.com>