Message-ID: <46445EB9.8040106@redhat.com>
Date: Fri, 11 May 2007 08:16:57 -0400
From: Steven Rostedt <srostedt@redhat.com>
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To: Li Yu <raise.sail@gmail.com>
CC: LKML <linux-kernel@vger.kernel.org>,
       Esben Nielsen <nielsen.esben@googlemail.com>
Subject: Re: Hi, I have one question about rt_mutex.
References: <4642CCEB.6010908@gmail.com> <4643176C.6050305@redhat.com> <4643CD44.1090903@gmail.com>
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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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