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/* Public domain. */
#ifndef _LINUX_RWSEM_H
#define _LINUX_RWSEM_H
#define down_read(rwl) rw_enter_read(rwl)
#define down_read_trylock(rwl) (rw_enter(rwl, RW_READ | RW_NOSLEEP) == 0)
#define up_read(rwl) rw_exit_read(rwl)
#define down_write(rwl) rw_enter_write(rwl)
#define up_write(rwl) rw_exit_write(rwl)
#define downgrade_write(rwl) rw_enter(rwl, RW_DOWNGRADE)
#endif
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