linux-kernel - Re: irq-disabled vs vmap vs text

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Date:	Fri, 13 Feb 2009 15:28:57 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
Cc:	Nick Piggin <npiggin@...e.de>, akpm <akpm@...ux-foundation.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>,
	Masami Hiramatsu <mhiramat@...hat.com>, ananth@...ibm.com,
	davem@...emloft.net
Subject: Re: irq-disabled vs vmap vs text_poke

Ok, lets CC kprobes folk

On Fri, 2009-02-13 at 09:18 -0500, Mathieu Desnoyers wrote:
> 
> text_poke should actually use local_irq_disable/enable rather than
> local_irq_save/restore because it _must_ be called with interrupts on.
> 
> > Anybody got an idea on how to fix this?
> 
> There is probably something wrong with the caller, kprobes, which calls
> text_poke with interrupts off.


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