From mboxrd@z Thu Jan  1 00:00:00 1970
From: catalin.marinas@arm.com (Catalin Marinas)
Date: Wed, 20 Jul 2016 17:28:28 +0100
Subject: [PATCH v15 04/10] arm64: Kprobes with single stepping support
In-Reply-To: <578FA238.3050206@arm.com>
References: <1467995754-32508-1-git-send-email-dave.long@linaro.org>
 <1467995754-32508-5-git-send-email-dave.long@linaro.org>
 <578FA238.3050206@arm.com>
Message-ID: <20160720162827.GF25890@e104818-lin.cambridge.arm.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On Wed, Jul 20, 2016 at 05:09:28PM +0100, Marc Zyngier wrote:
> +static inline unsigned long min_stack_size(unsigned long addr)
> +{
> +	unsigned long size;
> +	struct kprobe_ctlblk *ctl;
> +
> +	if (on_irq_stack(addr, raw_smp_processor_id()))
> +		size = IRQ_STACK_PTR(raw_smp_processor_id()) - addr;
> +	else
> +		size = (unsigned long)current_thread_info() + THREAD_START_SP - addr;
> +
> +	return min(size, sizeof(ctl->jprobes_stack));
> +}

We could drop the local ctl pointer:

	return min(size, sizeof(((struct kprobe_ctlblk *)0)->jprobes_stack));

If you add a log, I'll push the patch on top of the kprobes branch.

Thanks.

-- 
Catalin