Man page 9 : mutex_trylock

mutex_trylock - try to acquire the mutex, without waiting

int __sched mutex_trylock(struct mutex *  lock );

lock
    the mutex to be acquired

Try to acquire the mutex atomically. Returns 1 if the mutex has been acquired successfully, and 0 on contention.

this function follows the spin_trylock convention, so it is negated from the down_trylock return values! Be careful about this when converting semaphore users to mutexes.

This function must not be used in interrupt context. The mutex must be released by the same task that acquired it.

Rusty Russell <>
    Author.