linux-kernel - Re: [RFC] avoid indirect calls for DMA direct mappings v2

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Date:   Tue, 11 Dec 2018 07:51:12 +0100
From:   Christoph Hellwig <hch@....de>
To:     "Luck, Tony" <tony.luck@...el.com>
Cc:     Christoph Hellwig <hch@....de>, iommu@...ts.linux-foundation.org,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        Tariq Toukan <tariqt@...lanox.com>,
        Ilias Apalodimas <ilias.apalodimas@...aro.org>,
        Toke Høiland-Jørgensen <toke@...e.dk>,
        Robin Murphy <robin.murphy@....com>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Keith Busch <keith.busch@...el.com>,
        Jonathan Derrick <jonathan.derrick@...el.com>,
        linux-pci@...r.kernel.org, linux-ia64@...r.kernel.org,
        x86@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC] avoid indirect calls for DMA direct mappings v2

On Mon, Dec 10, 2018 at 01:51:13PM -0800, Luck, Tony wrote:
> But the ia64 build fails with:

Yes, I just got the same complaint form the buildbot, unfortunately
I don't have a good ia64 cross compiler locally given that Debian
is lacking one, and the one provided by the buildbot doesn't build on
Debian either..

This should fix it:

diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index 2c51733f1dfd..a007afaa556c 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -8,6 +8,7 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 
+#include <linux/dma-noncoherent.h>
 #include <linux/efi.h>
 #include <linux/elf.h>
 #include <linux/memblock.h>