Andreas Schwab wrote: > Larry Finger <[EMAIL PROTECTED]> writes: > >> 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() > > When two CPUs may enter the critical region at the same time, what is > the point of the mutex? Also, the first CPU may unlock the mutex while > the second one is still inside the critical region.
Thank you for that answer. I think that I'm finally beginning to understand. Larry - 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/
