linux-kernel - RE: kvm warning

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Message-ID: <alpine.LFD.0.999.0708132339431.29609@enigma.security.iitk.ac.in>
Date:	Mon, 13 Aug 2007 23:41:45 +0530 (IST)
From:	Satyam Sharma <satyam@...radead.org>
To:	"Luck, Tony" <tony.luck@...el.com>
cc:	Avi Kivity <avi@...ranet.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>, kvm-devel@...ts.sourceforge.net,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: RE: kvm warning



On Mon, 13 Aug 2007, Luck, Tony wrote:

> > Solution (1) above sounds preferable, unless there are mysterious reasons
> > why ia64 wants to avoid Kconfig.preempt (adding Tony Luck to Cc:).
> 
> Send me a patch and unless it causes more problems than it solves, I'll
> put it in.


[PATCH] ia64: Include Kconfig.preempt

arch/ia64/Kconfig failed to include kernel/Kconfig.preempt that meant it
did not support PREEMPT_VOLUNTARY and PREEMPT_BKL (inadvertently).
This was recently noticed when the newly-added PREEMPT_NOTIFIERS in
Kconfig.preempt that was "select"ed from drivers/kvm/Kconfig (therefore)
started giving bogus warnings ('select' used by config symbol 'KVM' refers
to undefined symbol 'PREEMPT_NOTIFIERS') on ia64 builds.

So let's remove the open-coded definition of CONFIG_PREEMPT in
arch/ia64/Kconfig and replace it with just including Kconfig.preempt
instead, like the other archs do.

Signed-off-by: Satyam Sharma <satyam@...radead.org>

---

 arch/ia64/Kconfig |   12 +-----------
 1 files changed, 1 insertions(+), 11 deletions(-)

diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 21aa4fc..8c39913 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -327,17 +327,7 @@ config FORCE_CPEI_RETARGET
 	This option it useful to enable this feature on older BIOS's as well.
 	You can also enable this by using boot command line option force_cpei=1.
 
-config PREEMPT
-	bool "Preemptible Kernel"
-        help
-          This option reduces the latency of the kernel when reacting to
-          real-time or interactive events by allowing a low priority process to
-          be preempted even if it is in kernel mode executing a system call.
-          This allows applications to run more reliably even when the system is
-          under load.
-
-          Say Y here if you are building a kernel for a desktop, embedded
-          or real-time system.  Say N if you are unsure.
+source "kernel/Kconfig.preempt"
 
 source "mm/Kconfig"
 
-
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