linux-kernel - Re: [PATCH 7/7] x86: Tell about irq stack coverage

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Date:	Wed, 25 Sep 2013 16:08:20 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@....ibm.com>,
	Ingo Molnar <mingo@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	James Hogan <james.hogan@...tec.com>,
	"James E.J. Bottomley" <jejb@...isc-linux.org>,
	Helge Deller <deller@....de>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	"David S. Miller" <davem@...emloft.net>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 7/7] x86: Tell about irq stack coverage

On Wed, Sep 25, 2013 at 9:18 AM, Frederic Weisbecker <fweisbec@...il.com> wrote:
> +#ifdef CONFIG_X86_64
> +# define __ARCH_IRQ_EXIT_ON_IRQ_STACK
> +#endif

Ok, see the previous email, this should just be a single

    select IRQ_EXIT_ON_IRQ_STACK

in under the "config X86_64" header in arch/x86/Kconfig.

And as of right now, this patch series should do it for Power too,
since I just merged Ben's branch, which contained commit 0366a1c70b89
("powerpc/irq: Run softirqs off the top of the irq stack"). Again,
just a single select in the arch/powerpc/Kconfig gile should be
sufficient.

                     Linus
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