linux-kernel - Re: tick-common.c hack for s390 needed

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: <20080325193004.GA11412@flint.arm.linux.org.uk>
Date:	Tue, 25 Mar 2008 19:30:05 +0000
From:	Russell King <rmk+lkml@....linux.org.uk>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	Heiko Carstens <heiko.carstens@...ibm.com>,
	Ingo Molnar <mingo@...e.hu>,
	Christoph Hellwig <hch@...radead.org>,
	linux-kernel@...r.kernel.org,
	Martin Schwidefsky <schwidefsky@...ibm.com>, paulus@...ba.org,
	ralf@...ux-mips.org, davem@...emloft.net, lethal@...ux-sh.org,
	jdike@...toit.com
Subject: Re: tick-common.c hack for s390 needed

On Tue, Mar 25, 2008 at 08:09:15PM +0100, Thomas Gleixner wrote:
> On Sun, 23 Mar 2008, Russell King wrote:
> 
> > On Sat, Mar 22, 2008 at 09:32:23PM +0100, Heiko Carstens wrote:
> > > Generic code is not supposed to include irq.h. Replace this include
> > > by linux/hardirq.h instead and add/replace an include of linux/irq.h
> > > in asm header files where necessary.
> > > This change should only matter for architectures that make use of
> > > GENERIC_CLOCKEVENTS.
> > > Architectures in question are mips, x86, arm, sh, powerpc, uml and sparc64.
> > > 
> > > I did some cross compile tests for mips, x86_64, arm, powerpc and sparc64.
> > > This patch fixes also build breakages caused by the include replacement in
> > > tick-common.h.
> > 
> > I generally dislike adding optional linux/* includes in asm/* includes -
> > I'm nervous about this causing include loops.
> > 
> > However, there's a separate point to be discussed here.
> > 
> > That is, what interfaces are expected of every architecture in the kernel.
> > If generic code wants to be able to set the affinity of interrupts, then
> > that needs to become part of the interfaces listed in linux/interrupt.h
> > rather than linux/irq.h.
> > 
> > So what I suggest is this approach instead (against Linus' tree of a
> > couple of days ago) - we move irq_set_affinity() and irq_can_set_affinity()
> > to linux/interrupt.h, change the linux/irq.h includes to linux/interrupt.h
> > and include asm/irq_regs.h where needed (asm/irq_regs.h is supposed to be
> > rarely used include since not much touches the stacked parent context
> > registers.)
> 
> That patch makes a lot of sense and resolves all the issues. 
> 
> I push it through hrt.git and add the GENERIC_HARDIRQS dependency
> which was requested by Heiko.

Okay.  Signed-off-by: Russell King <rmk+kernel@....linux.org.uk>

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:
--
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/