From mboxrd@z Thu Jan  1 00:00:00 1970
From: Catalin Marinas <catalin.marinas@arm.com>
Subject: Re: [RFC 2/3] arm: mm: Define set_memory_* functions for ARM
Date: Thu, 13 Jun 2013 17:25:59 +0100
Message-ID: <20130613162559.GC9609@arm.com>
References: <1371057810-3189-1-git-send-email-lauraa@codeaurora.org>
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To: Laura Abbott <lauraa@codeaurora.org>
Cc: "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.org>, Russell King <linux@arm.linux.org.uk>, Will Deacon <Will.Deacon@arm.com>, Nicoas Pitre <nicolas.pitre@linaro.org>, "linux-arm-msm@vger.kernel.org" <linux-arm-msm@vger.kernel.org>

On Wed, Jun 12, 2013 at 06:23:29PM +0100, Laura Abbott wrote:
> +int set_memory_ro(unsigned long addr, int numpages)
> +{
> +	unsigned long start = addr;
> +	unsigned long size = PAGE_SIZE*numpages;
> +	unsigned end = start + size;
> +
> +	apply_to_page_range(&init_mm, start, size, pte_set_ro, NULL);
> +	dsb();
> +	flush_tlb_kernel_range(start, end);

I think flush_tlb_kernel_range() already has a DSB.

-- 
Catalin