linux-kernel - [PATCH] FRV: Fix {dis,en}able_irq_lockdep

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Message-ID: <5905.1157469663@warthog.cambridge.redhat.com>
Date:	Tue, 05 Sep 2006 16:21:03 +0100
From:	David Howells <dhowells@...hat.com>
To:	Adrian Bunk <bunk@...sta.de>
Cc:	Andrew Morton <akpm@...l.org>,
	Arjan van de Ven <arjan@...ux.intel.com>,
	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Jeff Garzik <jeff@...zik.org>, netdev@...r.kernel.org,
	David Howells <dhowells@...hat.com>
Subject: [PATCH] FRV: Fix {dis,en}able_irq_lockdep_irqrestore compile error 


Fix the lack of certain non-LOCKDEP stub functions in linux/interrupt.h and
also provide FRV with LOCKDEP variants.

This is to be applied to -mm kernel since not all of the functions added exist
in the main kernel.

Signed-Off-By: David Howells <dhowells@...hat.com>
---
warthog>diffstat -p1 frv-irq-lockdep-2618rc5mm1.diff 
 include/asm-frv/irq.h     |   43 +++++++++++++++++++++++++++++++++++++++++++
 include/linux/interrupt.h |    2 ++
 2 files changed, 45 insertions(+)

diff -urp ../kernels/linux-2.6.18-rc5-mm1/include/asm-frv/irq.h linux-2.6.18-rc5-mm1-frv/include/asm-frv/irq.h
--- ../kernels/linux-2.6.18-rc5-mm1/include/asm-frv/irq.h	2006-09-04 18:02:48.000000000 +0100
+++ linux-2.6.18-rc5-mm1-frv/include/asm-frv/irq.h	2006-09-05 15:59:08.000000000 +0100
@@ -39,5 +39,48 @@ extern void disable_irq_nosync(unsigned 
 extern void disable_irq(unsigned int irq);
 extern void enable_irq(unsigned int irq);
 
+#ifdef CONFIG_LOCKDEP
+/*
+ * Special lockdep variants of irq disabling/enabling.
+ * These should be used for locking constructs that
+ * know that a particular irq context which is disabled,
+ * and which is the only irq-context user of a lock,
+ * that it's safe to take the lock in the irq-disabled
+ * section without disabling hardirqs.
+ *
+ * On !CONFIG_LOCKDEP they are equivalent to the normal
+ * irq disable/enable methods.
+ */
+static inline void disable_irq_nosync_lockdep(unsigned int irq)
+{
+	disable_irq_nosync(irq);
+	local_irq_disable();
+}
+
+static inline void disable_irq_nosync_lockdep_irqsave(unsigned int irq, unsigned long *flags)
+{
+	disable_irq_nosync(irq);
+	local_irq_save(*flags);
+}
+
+static inline void disable_irq_lockdep(unsigned int irq)
+{
+	disable_irq(irq);
+	local_irq_disable();
+}
+
+static inline void enable_irq_lockdep(unsigned int irq)
+{
+	local_irq_enable();
+	enable_irq(irq);
+}
+
+static inline void enable_irq_lockdep_irqrestore(unsigned int irq, unsigned long *flags)
+{
+	local_irq_restore(*flags);
+	enable_irq(irq);
+}
+#endif /* CONFIG_LOCKDEP */
+
 
 #endif /* _ASM_IRQ_H_ */
diff -urp ../kernels/linux-2.6.18-rc5-mm1/include/linux/interrupt.h linux-2.6.18-rc5-mm1-frv/include/linux/interrupt.h
--- ../kernels/linux-2.6.18-rc5-mm1/include/linux/interrupt.h	2006-09-04 18:03:31.000000000 +0100
+++ linux-2.6.18-rc5-mm1-frv/include/linux/interrupt.h	2006-09-05 15:58:53.000000000 +0100
@@ -178,6 +178,8 @@ static inline int disable_irq_wake(unsig
 #  define disable_irq_nosync_lockdep(irq)	disable_irq_nosync(irq)
 #  define disable_irq_lockdep(irq)		disable_irq(irq)
 #  define enable_irq_lockdep(irq)		enable_irq(irq)
+#  define disable_irq_nosync_lockdep_irqsave(irq, flags) disable_irq_nosync(irq)
+#  define enable_irq_lockdep_irqrestore(irq, flags) enable_irq(irq)
 # endif
 
 #endif /* CONFIG_GENERIC_HARDIRQS */
-
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