[PATCH] lockdep: irqtrace subsystem, core

Accurate hard-IRQ-flags and softirq-flags state tracing.

This allows us to attach extra functionality to IRQ flags on/off
events (such as trace-on/off).

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 15 insertions, 0 deletions

diff --git a/include/linux/sched.h b/include/linux/sched.h
index bdabeee10a78..ad7a89014d29 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -871,6 +871,21 @@ struct task_struct {
         /* mutex deadlock detection */
         struct mutex_waiter *blocked_on;
 #endif
+#ifdef CONFIG_TRACE_IRQFLAGS
+        unsigned int irq_events;
+        int hardirqs_enabled;
+        unsigned long hardirq_enable_ip;
+        unsigned int hardirq_enable_event;
+        unsigned long hardirq_disable_ip;
+        unsigned int hardirq_disable_event;
+        int softirqs_enabled;
+        unsigned long softirq_disable_ip;
+        unsigned int softirq_disable_event;
+        unsigned long softirq_enable_ip;
+        unsigned int softirq_enable_event;
+        int hardirq_context;
+        int softirq_context;
+#endif
 
 /* journalling filesystem info */
         void *journal_info;