From patchwork Tue Apr 13 06:42:51 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Miller X-Patchwork-Id: 50029 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 32F16B7CF3 for ; Tue, 13 Apr 2010 16:43:01 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751820Ab0DMGmr (ORCPT ); Tue, 13 Apr 2010 02:42:47 -0400 Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:46384 "EHLO sunset.davemloft.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751247Ab0DMGmq (ORCPT ); Tue, 13 Apr 2010 02:42:46 -0400 Received: from localhost (localhost [127.0.0.1]) by sunset.davemloft.net (Postfix) with ESMTP id 24A9924C08F; Mon, 12 Apr 2010 23:42:51 -0700 (PDT) Date: Mon, 12 Apr 2010 23:42:51 -0700 (PDT) Message-Id: <20100412.234251.82117799.davem@davemloft.net> To: sparclinux@vger.kernel.org CC: fweisbec@gmail.com Subject: [PATCH 5/7] sparc64: Use a seperate counter for timer interrupts and NMI checks, like x86. From: David Miller X-Mailer: Mew version 6.3 on Emacs 23.1 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Sender: sparclinux-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: sparclinux@vger.kernel.org This keeps us from having to use kstat_irqs_cpu() from the NMI handler, the former of which is a profiled function. Instead we use a currently empty slot in the cpu_data Signed-off-by: David S. Miller --- arch/sparc/include/asm/cpudata_64.h | 2 +- arch/sparc/kernel/nmi.c | 3 +-- arch/sparc/kernel/time_64.c | 1 + 3 files changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/sparc/include/asm/cpudata_64.h b/arch/sparc/include/asm/cpudata_64.h index 926397d..050ef35 100644 --- a/arch/sparc/include/asm/cpudata_64.h +++ b/arch/sparc/include/asm/cpudata_64.h @@ -17,7 +17,7 @@ typedef struct { unsigned int __nmi_count; unsigned long clock_tick; /* %tick's per second */ unsigned long __pad; - unsigned int __pad1; + unsigned int irq0_irqs; unsigned int __pad2; /* Dcache line 2, rarely used */ diff --git a/arch/sparc/kernel/nmi.c b/arch/sparc/kernel/nmi.c index b287b62..75a3d1a 100644 --- a/arch/sparc/kernel/nmi.c +++ b/arch/sparc/kernel/nmi.c @@ -92,7 +92,6 @@ static void die_nmi(const char *str, struct pt_regs *regs, int do_panic) notrace __kprobes void perfctr_irq(int irq, struct pt_regs *regs) { unsigned int sum, touched = 0; - int cpu = smp_processor_id(); clear_softint(1 << irq); @@ -106,7 +105,7 @@ notrace __kprobes void perfctr_irq(int irq, struct pt_regs *regs) else pcr_ops->write(PCR_PIC_PRIV); - sum = kstat_irqs_cpu(0, cpu); + sum = local_cpu_data().irq0_irqs; if (__get_cpu_var(nmi_touch)) { __get_cpu_var(nmi_touch) = 0; touched = 1; diff --git a/arch/sparc/kernel/time_64.c b/arch/sparc/kernel/time_64.c index 67e1651..f25858e 100644 --- a/arch/sparc/kernel/time_64.c +++ b/arch/sparc/kernel/time_64.c @@ -728,6 +728,7 @@ void timer_interrupt(int irq, struct pt_regs *regs) irq_enter(); + local_cpu_data().irq0_irqs++; kstat_incr_irqs_this_cpu(0, irq_to_desc(0)); if (unlikely(!evt->event_handler)) {