futex_proxy_trylock_atomic — Attempt an atomic lock for the top waiter
int futex_proxy_trylock_atomic ( | u32 __user * pifutex, |
| struct futex_hash_bucket * hb1, | |
| struct futex_hash_bucket * hb2, | |
| union futex_key * key1, | |
| union futex_key * key2, | |
| struct futex_pi_state ** ps, | |
int set_waiters); |
u32 __user * pifutexthe user address of the to futex
struct futex_hash_bucket * hb1the from futex hash bucket, must be locked by the caller
struct futex_hash_bucket * hb2the to futex hash bucket, must be locked by the caller
union futex_key * key1the from futex key
union futex_key * key2the to futex key
struct futex_pi_state ** psaddress to store the pi_state pointer
int set_waitersforce setting the FUTEX_WAITERS bit (1) or not (0)
Try and get the lock on behalf of the top waiter if we can do it atomically.
Wake the top waiter if we succeed. If the caller specified set_waiters,
then direct futex_lock_pi_atomic to force setting the FUTEX_WAITERS bit.
hb1 and hb2 must be held by the caller.