percpu-rwsem: introduce percpu_rwsem_release() and percpu_rwsem_acquire()

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Add percpu_rwsem_release() and percpu_rwsem_acquire() for the users
which need to return to userspace with percpu-rwsem lock held and/or
pass the ownership to another thread.

TODO: change percpu_rwsem_release() to use rwsem_clear_owner(). We can
either fold kernel/locking/rwsem.h into include/linux/rwsem.h, or add
the non-inline percpu_rwsem_clear_owner().

Signed-off-by: Oleg Nesterov <oleg@redhat.com>

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Oleg Nesterov 2015-07-21 20:26:44 +02:00

parent 9287f6925a

commit 55cc156505

1 changed files with 19 additions and 0 deletions

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include/linux/percpu-rwsem.h

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