Implement down_write_killable() in the LinuxKPI.
MFC after: 1 week Sponsored by: Mellanox Technologies
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@ -47,6 +47,7 @@ struct rw_semaphore {
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#define up_read(_rw) sx_sunlock(&(_rw)->sx)
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#define down_read_trylock(_rw) !!sx_try_slock(&(_rw)->sx)
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#define down_write_trylock(_rw) !!sx_try_xlock(&(_rw)->sx)
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#define down_write_killable(_rw) !!sx_xlock_sig(&(_rw)->sx)
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#define downgrade_write(_rw) sx_downgrade(&(_rw)->sx)
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#define down_read_nested(_rw, _sc) down_read(_rw)
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#define init_rwsem(_rw) linux_init_rwsem(_rw, rwsem_name("lnxrwsem"))
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