From: Ingo Molnar <[email protected]>
teach special (recursive) locking code to the lock validator. Has no
effect on non-lockdep kernels.
Signed-off-by: Ingo Molnar <[email protected]>
Signed-off-by: Arjan van de Ven <[email protected]>
---
---
kernel/irq/handle.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
Index: linux/kernel/irq/handle.c
===================================================================
--- linux.orig/kernel/irq/handle.c
+++ linux/kernel/irq/handle.c
@@ -11,6 +11,7 @@
#include <linux/random.h>
#include <linux/interrupt.h>
#include <linux/kernel_stat.h>
+#include <linux/kallsyms.h>
#include "internals.h"
@@ -193,3 +194,15 @@ out:
return 1;
}
+/*
+ * lockdep: we want to handle all irq_desc locks as a single lock-type:
+ */
+static struct lockdep_type_key irq_desc_lock_type;
+
+void early_init_irq_lock_type(void)
+{
+ int i;
+
+ for (i = 0; i < NR_IRQS; i++)
+ spin_lock_init_key(&irq_desc[i].lock, &irq_desc_lock_type);
+}
-
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