From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.windriver.com (mail.windriver.com [147.11.1.11]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "mail.windriver.com", Issuer "Intel External Basic Issuing CA 3A" (not verified)) by ozlabs.org (Postfix) with ESMTPS id 402182C0172 for ; Mon, 15 Jul 2013 12:35:18 +1000 (EST) From: Tiejun Chen To: Subject: [v1][PATCH 1/1] powerpc: to access local paca after hard irq disabled Date: Mon, 15 Jul 2013 10:36:04 +0800 Message-ID: <1373855764-5115-1-git-send-email-tiejun.chen@windriver.com> MIME-Version: 1.0 Content-Type: text/plain Cc: scottwood@freescale.com, linuxppc-dev@ozlabs.org, kvm@vger.kernel.org, kvm-ppc@vger.kernel.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , We can access paca directly after hard interrupt disabled, and this can avoid accessing wrong paca when using get_paca() in preempt case. Signed-off-by: Tiejun Chen --- arch/powerpc/include/asm/hw_irq.h | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/arch/powerpc/include/asm/hw_irq.h b/arch/powerpc/include/asm/hw_irq.h index ba713f1..10be1dd 100644 --- a/arch/powerpc/include/asm/hw_irq.h +++ b/arch/powerpc/include/asm/hw_irq.h @@ -96,10 +96,11 @@ static inline bool arch_irqs_disabled(void) #endif #define hard_irq_disable() do { \ - u8 _was_enabled = get_paca()->soft_enabled; \ + u8 _was_enabled; \ __hard_irq_disable(); \ - get_paca()->soft_enabled = 0; \ - get_paca()->irq_happened |= PACA_IRQ_HARD_DIS; \ + _was_enabled = local_paca->soft_enabled; \ + local_paca->soft_enabled = 0; \ + local_paca->irq_happened |= PACA_IRQ_HARD_DIS; \ if (_was_enabled) \ trace_hardirqs_off(); \ } while(0) -- 1.7.9.5