linux-kernel - Re: [PATCH V2 02/15] sh: Eliminate unused irq_reg

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: <1879572.mbc2eHiUuo@wuerfel>
Date:	Thu, 30 Oct 2014 11:48:18 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	Kevin Cernekee <cernekee@...il.com>, f.fainelli@...il.com,
	jason@...edaemon.net, ralf@...ux-mips.org, lethal@...ux-sh.org,
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
	mbizon@...ebox.fr, jogo@...nwrt.org, linux-mips@...ux-mips.org
Subject: Re: [PATCH V2 02/15] sh: Eliminate unused irq_reg_{readl,writel} accessors

On Thursday 30 October 2014 11:43:00 Thomas Gleixner wrote:
> On Thu, 30 Oct 2014, Arnd Bergmann wrote:
> 
> > On Wednesday 29 October 2014 19:17:55 Kevin Cernekee wrote:
> > > Defining these macros way down in arch/sh/.../irq.c doesn't cause
> > > kernel/irq/generic-chip.c to use them.  As far as I can tell this code
> > > has no effect.
> > > 
> > > Signed-off-by: Kevin Cernekee <cernekee@...il.com>
> > 
> > Actually it overrides the 32-bit accessors with 16-bit accessors,
> > which does seem intentional and certainly has an effect.
> 
> Not really. Neither arch/sh/boards/mach-se/7343/irq.c nor
> arch/sh/boards/mach-se/7722/irq.c actually use
> irq_reg_readl/writel. They simply define it.

Ah, that makes things easier. I looked at the commits that introduced
them, and even then they were unused. Probably an artifact from an
earlier version of the patch which did not get merged.

	Arnd
--
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/