linux-kernel - Re: [PATCH] nommu: allow mmap when !CONFIG

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Message-ID: <20161209200200.GN14217@n2100.armlinux.org.uk>
Date:   Fri, 9 Dec 2016 20:02:00 +0000
From:   Russell King - ARM Linux <linux@...linux.org.uk>
To:     Benjamin Gaignard <benjamin.gaignard@...aro.org>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Robin.Murphy@....com, Catalin Marinas <catalin.marinas@....com>,
        arnd@...db.de
Subject: Re: [PATCH] nommu: allow mmap when !CONFIG_MMU

On Thu, Dec 01, 2016 at 02:48:00PM +0100, Benjamin Gaignard wrote:
> commit ab6494f0c96f ("nommu: Add noMMU support to the DMA API") have
> add CONFIG_MMU compilation flag but that prohibit to use dma_mmap_wc()
> when the platform doesn't have MMU.
> 
> This patch call vm_iomap_memory() in noMMU case to test if addresses
> are correct and set wma->vm_flags rather than all return an error.

ITYM vma.

I think this is fine, but I've no way to know as I don't run nommu here...
I've been hoping that others working on nommu would at least give an
ack or something, but I guess not.

So, please put it in the patch system, thanks.

-- 
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
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