From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mtagate6.de.ibm.com ([195.212.29.155]:45185 "EHLO mtagate6.de.ibm.com") by vger.kernel.org with ESMTP id S1030189AbWISLTx (ORCPT ); Tue, 19 Sep 2006 07:19:53 -0400 Date: Tue, 19 Sep 2006 13:19:50 +0200 From: Martin Schwidefsky Subject: [patch 2/3] Directed yield: direct yield of spinlocks for powerpc. Message-ID: <20060919111950.GD21713@skybase> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Sender: linux-arch-owner@vger.kernel.org To: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, akpm@osdl.org Cc: mingo@elte.hu, paulus@samba.org List-ID: From: Martin Schwidefsky [patch 2/3] Directed yield: direct yield of spinlocks for powerpc. Powerpc already has a directed yield for CONFIG_PREEMPT="n". To make it work with CONFIG_PREEMPT="y" as well the _raw_{spin,read,write}_relax primitives need to be defined to call __spin_yield() for spinlocks and __rw_yield() for rw-locks. Cc: Paul Mackerras Signed-off-by: Martin Schwidefsky --- include/asm-powerpc/spinlock.h | 6 +++--- 1 files changed, 3 insertions(+), 3 deletions(-) diff -urpN linux-2.6/include/asm-powerpc/spinlock.h linux-2.6-patched/include/asm-powerpc/spinlock.h --- linux-2.6/include/asm-powerpc/spinlock.h 2006-09-19 12:59:35.000000000 +0200 +++ linux-2.6-patched/include/asm-powerpc/spinlock.h 2006-09-19 12:59:35.000000000 +0200 @@ -285,9 +285,9 @@ static __inline__ void __raw_write_unloc rw->lock = 0; } -#define _raw_spin_relax(lock) cpu_relax() -#define _raw_read_relax(lock) cpu_relax() -#define _raw_write_relax(lock) cpu_relax() +#define _raw_spin_relax(lock) __spin_yield(lock) +#define _raw_read_relax(lock) __rw_yield(lock) +#define _raw_write_relax(lock) __rw_yield(lock) #endif /* __KERNEL__ */ #endif /* __ASM_SPINLOCK_H */