linux-kernel - Re: [PATCH] gpu: host1x: use %pa to print dma_addr

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1379346848.1934.13.camel@joe-AO722>
Date:	Mon, 16 Sep 2013 08:54:08 -0700
From:	Joe Perches <joe@...ches.com>
To:	Olof Johansson <olof@...om.net>
Cc:	Thierry Reding <thierry.reding@...il.com>,
	Terje Bergström <tbergstrom@...dia.com>,
	dri-devel@...ts.freedesktop.org,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] gpu: host1x: use %pa to print dma_addr_t

On Mon, 2013-09-16 at 08:46 -0700, Olof Johansson wrote:
> On Mon, Sep 16, 2013 at 8:17 AM, Thierry Reding
> <thierry.reding@...il.com> wrote:
> > On Wed, Sep 11, 2013 at 09:41:49PM -0700, Olof Johansson wrote:
> >> This removes two warnings where dma_addr_t variables were printed using
> >> %x when built with CONFIG_ARM_LPAE=y, thus having 64-bit dma_addr_t:
> >>
> >>   drivers/gpu/host1x/hw/cdma_hw.c:57:3: warning: format '%x' expects argument of type 'unsigned int', but argument 5 has type 'dma_addr_t'
> >>   drivers/gpu/host1x/hw/debug_hw.c:175:10: warning: format '%x' expects argument of type 'unsigned int', but argument 3 has type 'dma_addr_t'
> >
> > Hi Olof,
> >
> > I can't reproduce this. Does this perhaps depend on some other patch?
> > When I enable LPAE I do see similar warnings in drivers/iommu/tegra-*.c
> > and those can indeed be fixed using an equivalent patch.
> 
> You need to enable LPAE on a platform that also selects
> ARCH_DMA_ADDR_T_64BIT, I don't think tegra does. If you do it with
> multi_v7_defconfig you'll see them.
> 
> However, see discussion on another of the emails in the series; I'll
> have to introduce a new format specifier instead.

Or not.

I don't know whether or not the dma_addr_t really needs a
fixed 18 byte output length for 64 bit uses.

I think always using a cast for dma_addr_t addresses like:

	printk("dma_addr_t: %#llx\n", (u64)addr);

would probably work just fine.


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/