1 /* Public domain. */ 2 3 #ifndef _LINUX_RWSEM_H 4 #define _LINUX_RWSEM_H 5 6 #define down_read(rwl) rw_enter_read(rwl) 7 #define down_read_trylock(rwl) (rw_enter(rwl, RW_READ | RW_NOSLEEP) == 0) 8 #define up_read(rwl) rw_exit_read(rwl) 9 #define down_write(rwl) rw_enter_write(rwl) 10 #define up_write(rwl) rw_exit_write(rwl) 11 #define downgrade_write(rwl) rw_enter(rwl, RW_DOWNGRADE) 12 13 #endif 14