linux-kernel - Re: [patch 27/34] s390: Use generic idle loop

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Date:	Sat, 23 Mar 2013 10:39:42 +0100
From:	Heiko Carstens <heiko.carstens@...ibm.com>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	LKML <linux-kernel@...r.kernel.org>, linux-arch@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Paul McKenney <paulmck@...ux.vnet.ibm.com>,
	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <peterz@...radead.org>,
	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>,
	Magnus Damm <magnus.damm@...il.com>
Subject: Re: [patch 27/34] s390: Use generic idle loop

On Thu, Mar 21, 2013 at 09:53:18PM -0000, Thomas Gleixner wrote:
> Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
> Cc: Heiko Carstens <heiko.carstens@...ibm.com>
> ---
>  arch/s390/kernel/process.c |   25 +++++++------------------
>  arch/s390/kernel/smp.c     |    3 +--
>  2 files changed, 8 insertions(+), 20 deletions(-)

FWIW, the patch below is also needed to fix a compile error.
I'll take care it gets upstream independently of your work.

>From 10c8cd5139f9a18cd6e955793ae7ad0877b5dd86 Mon Sep 17 00:00:00 2001
From: Heiko Carstens <heiko.carstens@...ibm.com>
Date: Sat, 23 Mar 2013 10:29:01 +0100
Subject: [PATCH 2/2] s390/mm: provide emtpy check_pgt_cache() function

All architectures need to provide a check_pgt_cache() function. The s390 one
got lost somewhere.
So reintroduce it to prevent future compile errors e.g. if Thomas Gleixner's
idle loop rework patches get merged.

Signed-off-by: Heiko Carstens <heiko.carstens@...ibm.com>
---
 arch/s390/include/asm/pgtable.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index 4a29308..a11c773 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -1533,6 +1533,8 @@ extern int s390_enable_sie(void);
  */
 #define pgtable_cache_init()	do { } while (0)
 
+static inline void check_pgt_cache(void) { }
+
 #include <asm-generic/pgtable.h>
 
 #endif /* _S390_PAGE_H */
-- 
1.7.12.4

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