linux-kernel - Question regarding mutex locking

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Message-ID: <474CF06C.8020208@lwfinger.net>
Date:	Tue, 27 Nov 2007 22:37:00 -0600
From:	Larry Finger <Larry.Finger@...inger.net>
To:	LKML <linux-kernel@...r.kernel.org>
Subject: Question regarding mutex locking

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()

Thanks,

Larry
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