do page fault in atomic bug on arm

From: mhiramat@kernel.org (Masami Hiramatsu)
To: linux-arm-kernel@lists.infradead.org
Subject: do page fault in atomic bug on arm
Date: Thu, 30 Nov 2017 11:41:34 +0900	[thread overview]
Message-ID: <20171130114134.599e406afe19543fd5924e24@kernel.org> (raw)
In-Reply-To: <20171128095204.GR31757@n2100.armlinux.org.uk>

On Tue, 28 Nov 2017 09:52:05 +0000
Russell King - ARM Linux <linux@armlinux.org.uk> wrote:

> On Tue, Nov 28, 2017 at 02:52:21PM +0900, Masami Hiramatsu wrote:
> > So there is already NOKPROBE_SYMBOL() macro to make a blacklist so that
> > we can avoid such recursive faults. We need to identify such place and
> > put the symbols in it as I did on x86.
> 
> Only if they are C functions.  If they're assembly, NOKPROBE_SYMBOL()
> doesn't work.  The answer there is to move them into a section that
> is excluded from kprobing.  That's what the second patch I've already
> sent does.

Thanks!

And if you need to put some symbols in assembly which already in 
another section, you can use _ASM_NOKPROBE(symbol) macro :)

> 
> -- 
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-- 
Masami Hiramatsu <mhiramat@kernel.org>