linux-kernel - Re: [patch] doc: add a chapter about trylock functions [Bug 9011]

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Date:	Thu, 15 May 2008 10:30:18 +1000
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	"Matti Linnanvuori" <mattilinn@...il.com>
Cc:	"Randy Dunlap" <randy.dunlap@...cle.com>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org
Subject: Re: [patch] doc: add a chapter about trylock functions [Bug 9011]

On Wednesday 14 May 2008 01:31:47 Matti Linnanvuori wrote:
> +    <function>mutex_trylock()</function> does not suspend your task
> +    but returns non-zero if it could lock the mutex on the first try
> +    or 0 if not. This function cannot be safely used in hardware or
> +    software interrupt contexts despite not sleeping.

I know this is what the documentation says, but I can't see why.  Ingo?

Thanks,
Rusty.
PS. Patch fixed up and applied.
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