Li Yu wrote:
>
> However, I found the sys_futex() do not use rt_mutex, so what's mean of the user futex you said?
> Even, I have not found any usage for rt_mutex in kernel code. Or, some beautiful story will happen in future?
>
Just need to look a little deeper :-)
sys_futex calls do_futex
do_futex with the option of FUTEX_LOCK_PI will call futex_lock_pi
futex_lock_pi calls rt_mutex_timed_lock or rt_mutex_trylock both of
which are part of the rtmutex.c code.
So it's there today :-)
-- Steve
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