linux-kernel - Re: [PATCH v4 01/19] ARM: Make the argument to virt_to

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]

Date:	Tue, 25 Jan 2011 10:29:05 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Stephen Boyd <sboyd@...eaurora.org>,
	Catalin Marinas <catalin.marinas@....com>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v4 01/19] ARM: Make the argument to virt_to_phys()
	"const volatile"

On Tue, Jan 25, 2011 at 11:00:10AM +0100, Arnd Bergmann wrote:
> On Monday 24 January 2011, Stephen Boyd wrote:
> > On 01/24/2011 09:55 AM, Catalin Marinas wrote:
> > > Changing the virt_to_phys() argument to "const volatile void *" avoids
> > > compiler warnings in some situations where this function is used.
> > >
> > > Signed-off-by: Catalin Marinas <catalin.marinas@....com>
> > > Cc: Stephen Boyd <sboyd@...eaurora.org>
> > > Cc: Arnd Bergmann <arnd@...db.de>
> 
> Acked-by: Arnd Bergmann <arnd@...db.de>
> 
> > Acked-by: Stephen Boyd <sboyd@...eaurora.org>
> > 
> > Any chance we can get this one patch into 2.6.38? It fixes a warning for
> > MSM.
> 
> Stephen, you might want to have a look at why the warning even appears
> on MSM. Most uses of 'volatile' are misguided, and there could be an
> actual bug in there.

It's actually the right thing - look at x86's definition:

static inline phys_addr_t virt_to_phys(volatile void *address)
--
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/