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authorIngo Molnar <mingo@elte.hu>2006-07-03 00:25:06 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-07-03 15:27:06 -0700
commit243c7621aac4ed1aa79524c9a1cecf7c05a28124 (patch)
treed8f7a1fce57c9349183bfd9ab6738a763078db85 /kernel/irq
parent8b8f319fc7f4ab59f567d6a401a62659b3d37007 (diff)
downloadop-kernel-dev-243c7621aac4ed1aa79524c9a1cecf7c05a28124.zip
op-kernel-dev-243c7621aac4ed1aa79524c9a1cecf7c05a28124.tar.gz
[PATCH] lockdep: annotate genirq
Teach special (recursive) locking code to the lock validator. Has no effect on non-lockdep kernels. 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>
Diffstat (limited to 'kernel/irq')
-rw-r--r--kernel/irq/handle.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index aeb6e39..a7b497e 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -249,3 +249,19 @@ out:
return 1;
}
+#ifdef CONFIG_TRACE_IRQFLAGS
+
+/*
+ * lockdep: we want to handle all irq_desc locks as a single lock-class:
+ */
+static struct lock_class_key irq_desc_lock_class;
+
+void early_init_irq_lock_class(void)
+{
+ int i;
+
+ for (i = 0; i < NR_IRQS; i++)
+ lockdep_set_class(&irq_desc[i].lock, &irq_desc_lock_class);
+}
+
+#endif
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