From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: Sam Ravnborg <sam@ravnborg.org>
Cc: Ingo Molnar <mingo@elte.hu>,
linux-kernel@vger.kernel.org, tglx@linutronix.de,
akpm@linux-foundation.org, ralf@linux-mips.org,
kernel@wantstofly.org, hskinnemoen@atmel.com,
cooloney@kernel.org, tony.luck@intel.com, geert@linux-m68k.org,
zippel@linux-m68k.org, jwboyer@linux.vnet.ibm.com,
mporter@kernel.crashing.org, grant.likely@secretlab.ca,
paulus@samba.org, benh@kernel.crashing.org, dhowells@redhat.com,
yasutake.koichi@jp.panasonic.com, lethal@linux-sh.org,
hpa@zytor.com
Subject: Re: [PATCH -tip] Switch arm defconfig files from CONFIG_CLASSIC_RCU to CONFIG_TREE_RCU.
Date: Thu, 25 Dec 2008 11:23:32 -0800 [thread overview]
Message-ID: <20081225192332.GI6912@linux.vnet.ibm.com> (raw)
In-Reply-To: <20081225093301.GB27896@uranus.ravnborg.org>
On Thu, Dec 25, 2008 at 10:33:01AM +0100, Sam Ravnborg wrote:
> On Thu, Dec 25, 2008 at 09:36:11AM +0100, Ingo Molnar wrote:
> >
> > below is the fix for another small buglet that hits architectures that do
> > not include kernel/Kconfig.preempt.
>
> What is needed to let all architectures include Kconfig.preempt?
> We should not advertise preemption if not supported,
> but we could do this by a simple Kconfig symbol:
>
> config HAVE_PREEMPT
> bool
>
> And let all architectures that supports preemption do:
>
> config "ARCH"
> select HAVE_PREEMPT
>
> But maybe there is a simpler solution
The idea being to make things like PREEMPT then depend on HAVE_PREEMPT?
Seems reasonable to me, but I cannot claim to understand the
relationship of Kconfig and the various arches very well.
Thanx, Paul
next prev parent reply other threads:[~2008-12-26 1:09 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-23 0:12 [PATCH -tip] Change default from CLASSIC_RCU to TREE_RCU (testing only) paulmck
2008-12-23 0:12 ` [PATCH -tip] Set the default RCU to be rcutree paulmck
2008-12-23 0:12 ` [PATCH -tip] Switch arm defconfig files from CONFIG_CLASSIC_RCU to CONFIG_TREE_RCU paulmck
2008-12-23 14:25 ` Ingo Molnar
2008-12-23 21:59 ` Paul E. McKenney
2008-12-23 22:03 ` [PATCH, -tip] Remove redundant RCU_CPU_STALL_DETECTOR declaration Paul E. McKenney
2008-12-23 22:06 ` [PATCH, -tip] Make hierarchical RCU be the default Paul E. McKenney
2008-12-27 10:35 ` Ingo Molnar
2008-12-27 23:27 ` Paul E. McKenney
2008-12-27 23:39 ` Paul E. McKenney
2008-12-29 3:22 ` [PATCH, -tip] v2 " Paul E. McKenney
2008-12-25 8:36 ` [PATCH -tip] Switch arm defconfig files from CONFIG_CLASSIC_RCU to CONFIG_TREE_RCU Ingo Molnar
2008-12-25 9:33 ` Sam Ravnborg
2008-12-25 19:23 ` Paul E. McKenney [this message]
2008-12-26 18:35 ` Sam Ravnborg
2008-12-26 14:22 ` Ingo Molnar
2008-12-25 18:46 ` Paul E. McKenney
2008-12-23 0:12 ` [PATCH -tip] Switch avr32 defconfigs " paulmck
2008-12-23 0:12 ` [PATCH -tip] Switch blackfin defconfig " paulmck
2008-12-23 0:12 ` [PATCH -tip] Switch ia64 " paulmck
2008-12-23 0:12 ` [PATCH -tip] Switch m68k " paulmck
2008-12-23 0:12 ` [PATCH -tip] Switch m68knommu " paulmck
2008-12-23 0:12 ` [PATCH -tip] Switch mips defconfig " paulmck
2008-12-23 0:12 ` [PATCH -tip] Switch mn10300 " paulmck
2008-12-23 0:12 ` [PATCH -tip] Switch powerpc " paulmck
2008-12-23 0:12 ` [PATCH -tip] Switch sh " paulmck
2008-12-23 0:12 ` [PATCH -tip] Switch x86 " paulmck
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