Matthias Kaehlcke wrote: > El Tue, Nov 27, 2007 at 10:37:00PM -0600 Larry Finger ha dit: > >> If a particular routine needs to lock a mutex, but it may be entered with >> that mutex already locked, >> would the following code be SMP safe? >> >> hold_lock = mutex_trylock() >> >> ... >> >> if (hold_lock) >> mutex_unlock() > > this is wont work, a mutex must not be released from another > context than the one that acquired it.
I thought that mutex_trylock() returned 1 if it got the lock and 0 if not. If that is true, wouldn't the if statement only unlock if the lock was obtained in this routine? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
