From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755769AbZEIQvj (ORCPT ); Sat, 9 May 2009 12:51:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754869AbZEIQtM (ORCPT ); Sat, 9 May 2009 12:49:12 -0400 Received: from smtp.polymtl.ca ([132.207.4.11]:54451 "EHLO smtp.polymtl.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755057AbZEIQtK (ORCPT ); Sat, 9 May 2009 12:49:10 -0400 Message-Id: <20090509162348.527546872@polymtl.ca> References: <20090509162209.217414024@polymtl.ca> User-Agent: quilt/0.46-1 Date: Sat, 09 May 2009 12:22:11 -0400 From: Mathieu Desnoyers To: akpm@linux-foundation.org, Ingo Molnar , linux-kernel@vger.kernel.org, "Frank Ch. Eigler" , Jason Baron , Tom Zanussi , fweisbec@gmail.com, laijs@cn.fujitsu.com, rostedt@goodmis.org, peterz@infradead.org, jiayingz@google.com, roland@redhat.com, mbligh@google.com Cc: Mathieu Desnoyers Subject: [RFC patch 02/20] LTTng Kernel Trace Thread Flag ARM Content-Disposition: inline; filename=lttng-kernel-trace-thread-flag-arm.patch X-Poly-FromMTA: (test.casi.polymtl.ca [132.207.72.60]) at Sat, 9 May 2009 16:47:18 +0000 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add a thread flag to activate system-wide syscall tracing. folded omap-arm-fix-syscall-exit-trace-flag.patch. Signed-off-by: Mathieu Desnoyers --- arch/arm/include/asm/thread_info.h | 3 +++ arch/arm/kernel/entry-common.S | 2 ++ 2 files changed, 5 insertions(+) Index: linux-2.6-lttng/arch/arm/include/asm/thread_info.h =================================================================== --- linux-2.6-lttng.orig/arch/arm/include/asm/thread_info.h 2009-04-23 14:56:15.000000000 -0400 +++ linux-2.6-lttng/arch/arm/include/asm/thread_info.h 2009-04-23 14:56:23.000000000 -0400 @@ -128,6 +128,7 @@ extern void vfp_sync_state(struct thread /* * thread information flags: * TIF_SYSCALL_TRACE - syscall trace active + * TIF_KERNEL_TRACE - kernel trace active * TIF_SIGPENDING - signal pending * TIF_NEED_RESCHED - rescheduling necessary * TIF_USEDFPU - FPU was used by this task this quantum (SMP) @@ -135,6 +136,7 @@ extern void vfp_sync_state(struct thread */ #define TIF_SIGPENDING 0 #define TIF_NEED_RESCHED 1 +#define TIF_KERNEL_TRACE 7 #define TIF_SYSCALL_TRACE 8 #define TIF_POLLING_NRFLAG 16 #define TIF_USING_IWMMXT 17 @@ -143,6 +145,7 @@ extern void vfp_sync_state(struct thread #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) +#define _TIF_KERNEL_TRACE (1 << TIF_KERNEL_TRACE) #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) #define _TIF_USING_IWMMXT (1 << TIF_USING_IWMMXT) Index: linux-2.6-lttng/arch/arm/kernel/entry-common.S =================================================================== --- linux-2.6-lttng.orig/arch/arm/kernel/entry-common.S 2009-04-23 14:56:15.000000000 -0400 +++ linux-2.6-lttng/arch/arm/kernel/entry-common.S 2009-04-23 14:56:23.000000000 -0400 @@ -47,6 +47,8 @@ ret_fast_syscall: * Ok, we need to do extra processing, enter the slow path. */ fast_work_pending: + tst r1, #_TIF_KERNEL_TRACE @ flag can be set asynchronously + bne __sys_trace_return str r0, [sp, #S_R0+S_OFF]! @ returned r0 work_pending: tst r1, #_TIF_NEED_RESCHED -- Mathieu Desnoyers OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68