From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matt Helsley Subject: [RFC][PATCH 07/10] Task watchers v2 Register IRQ flag tracing task watcher Date: Thu, 28 Sep 2006 19:02:39 -0700 Message-ID: <20060929021301.409435000@us.ibm.com> References: <20060929020232.756637000@us.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline; filename=task-watchers-register-trace-irqflags List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: lse-tech-bounces@lists.sourceforge.net Errors-To: lse-tech-bounces@lists.sourceforge.net To: Linux-Kernel Cc: Chandra S Seetharaman , John T Kohl , Jes Sorensen , Paul Jackson , linux-audit@redhat.com, Al Viro , LSE-Tech , Steve Grubb , Christoph Hellwig List-Id: linux-audit@redhat.com Register an irq-flag-tracing task watcher instead of hooking into copy_process(). Signed-off-by: Matt Helsley --- kernel/fork.c | 19 ------------------- kernel/irq/handle.c | 24 ++++++++++++++++++++++++ 2 files changed, 24 insertions(+), 19 deletions(-) Index: linux-2.6.18-mm1/kernel/fork.c =================================================================== --- linux-2.6.18-mm1.orig/kernel/fork.c +++ linux-2.6.18-mm1/kernel/fork.c @@ -1058,29 +1058,10 @@ static struct task_struct *copy_process( p->tgid = current->tgid; retval = notify_task_watchers(WATCH_TASK_INIT, clone_flags, p); if (retval < 0) goto bad_fork_cleanup_delays_binfmt; -#ifdef CONFIG_TRACE_IRQFLAGS - p->irq_events = 0; -#ifdef __ARCH_WANT_INTERRUPTS_ON_CTXSW - p->hardirqs_enabled = 1; -#else - p->hardirqs_enabled = 0; -#endif - p->hardirq_enable_ip = 0; - p->hardirq_enable_event = 0; - p->hardirq_disable_ip = _THIS_IP_; - p->hardirq_disable_event = 0; - p->softirqs_enabled = 1; - p->softirq_enable_ip = _THIS_IP_; - p->softirq_enable_event = 0; - p->softirq_disable_ip = 0; - p->softirq_disable_event = 0; - p->hardirq_context = 0; - p->softirq_context = 0; -#endif #ifdef CONFIG_LOCKDEP p->lockdep_depth = 0; /* no locks held yet */ p->curr_chain_key = 0; p->lockdep_recursion = 0; #endif Index: linux-2.6.18-mm1/kernel/irq/handle.c =================================================================== --- linux-2.6.18-mm1.orig/kernel/irq/handle.c +++ linux-2.6.18-mm1/kernel/irq/handle.c @@ -13,10 +13,11 @@ #include #include #include #include #include +#include #include "internals.h" /** * handle_bad_irq - handle spurious and unhandled irqs @@ -269,6 +270,29 @@ void early_init_irq_lock_class(void) for (i = 0; i < NR_IRQS; i++) lockdep_set_class(&irq_desc[i].lock, &irq_desc_lock_class); } +static int init_task_trace_irqflags(unsigned long clone_flags, + struct task_struct *p) +{ + p->irq_events = 0; +#ifdef __ARCH_WANT_INTERRUPTS_ON_CTXSW + p->hardirqs_enabled = 1; +#else + p->hardirqs_enabled = 0; +#endif + p->hardirq_enable_ip = 0; + p->hardirq_enable_event = 0; + p->hardirq_disable_ip = _THIS_IP_; + p->hardirq_disable_event = 0; + p->softirqs_enabled = 1; + p->softirq_enable_ip = _THIS_IP_; + p->softirq_enable_event = 0; + p->softirq_disable_ip = 0; + p->softirq_disable_event = 0; + p->hardirq_context = 0; + p->softirq_context = 0; + return 0; +} +task_watcher_func(init, init_task_trace_irqflags); #endif -- ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV