[PATCH] IRQ: ease out-of-tree migration to new irq_handler prototype

[William D Waddington <william.waddington@beezmo.com>]

From: william.waddington@beezmo.com

Ease out-of-tree driver migration to new irq_handler prototype.
Define empty 3rd argument macro for use in multi kernel version
out-of-tree drivers going forward.  Backportable drives can do:

(in a header)
#ifndef __PT_REGS
# define __PT_REGS , struct pt_regs *regs
#endif

(in code body)
static irqreturn_t irq_handler(int irq, void *dev_id __PT_REGS)

Signed-off-by: Bill Waddington <william.waddington@beezmo.com>

---

Has this suggestion by Ingo Molnar been implemented?  May I
submit it?  Is this how it's done?

--- 2.6.19-rc3/include/linux/interrupt.h.ORIG	2006-11-04 
09:15:16.000000000 -0800
+++ 2.6.19-rc3/include/linux/interrupt.h	2006-11-04 09:23:18.000000000 -0800
@@ -66,6 +66,14 @@

 typedef irqreturn_t (*irq_handler_t)(int, void *);

+/*
+ * Irq handler migration helper - empty 3rd argument
+ * #define __PT_REGS , struct pt_regs *regs
+ * for older kernel versions
+ */
+
+#define __PT_REGS
+
 struct irqaction {
 	irq_handler_t handler;
 	unsigned long flags;


Bill
--
--------------------------------------------
William D Waddington
Bainbridge Island, WA, USA
william.waddington@beezmo.com
--------------------------------------------
"Even bugs...are unexpected signposts on
the long road of creativity..." - Ken Burtch
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