[patch 2/2] uml: make hw_controller_type->release exist only for archs needing it

[blaisorblade@yahoo.it]

From: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>, Chris Wedgwood <cw@f00f.org>
CC: Ingo Molnar <mingo@redhat.com>

As suggested by Chris, we can make the "just added" method ->release
conditional to UML only (better: to archs requesting it, i.e. only UML
currently), so that other archs don't get this unneeded crud, and if UML won't
need it any more we can kill this.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
---

 linux-2.6.git-paolo/arch/um/Kconfig     |    5 +++++
 linux-2.6.git-paolo/include/linux/irq.h |    3 +++
 linux-2.6.git-paolo/kernel/irq/manage.c |    4 ++++
 3 files changed, 12 insertions(+)

diff -puN arch/um/Kconfig~uml-gen-irq-conditionalize arch/um/Kconfig
--- linux-2.6.git/arch/um/Kconfig~uml-gen-irq-conditionalize	2005-06-07 02:25:25.000000000 +0200
+++ linux-2.6.git-paolo/arch/um/Kconfig	2005-06-07 02:25:25.000000000 +0200
@@ -35,6 +35,11 @@ config GENERIC_CALIBRATE_DELAY
 	bool
 	default y
 
+# Used in kernel/irq/manage.c and include/linux/irq.h
+config IRQ_RELEASE_METHOD
+	bool
+	default y
+
 menu "UML-specific options"
 
 config MODE_TT
diff -puN kernel/irq/manage.c~uml-gen-irq-conditionalize kernel/irq/manage.c
--- linux-2.6.git/kernel/irq/manage.c~uml-gen-irq-conditionalize	2005-06-07 02:25:25.000000000 +0200
+++ linux-2.6.git-paolo/kernel/irq/manage.c	2005-06-07 02:25:25.000000000 +0200
@@ -6,6 +6,7 @@
  * This file contains driver APIs to the irq subsystem.
  */
 
+#include <linux/config.h>
 #include <linux/irq.h>
 #include <linux/module.h>
 #include <linux/random.h>
@@ -256,8 +257,11 @@ void free_irq(unsigned int irq, void *de
 			/* Found it - now remove it from the list of entries */
 			*pp = action->next;
 
+			/* Currently used only by UML, might disappear one day.*/
+#ifdef CONFIG_IRQ_RELEASE_METHOD
 			if (desc->handler->release)
 				desc->handler->release(irq, dev_id);
+#endif
 
 			if (!desc->action) {
 				desc->status |= IRQ_DISABLED;
diff -puN include/linux/irq.h~uml-gen-irq-conditionalize include/linux/irq.h
--- linux-2.6.git/include/linux/irq.h~uml-gen-irq-conditionalize	2005-06-07 02:25:25.000000000 +0200
+++ linux-2.6.git-paolo/include/linux/irq.h	2005-06-07 02:25:25.000000000 +0200
@@ -47,7 +47,10 @@ struct hw_interrupt_type {
 	void (*ack)(unsigned int irq);
 	void (*end)(unsigned int irq);
 	void (*set_affinity)(unsigned int irq, cpumask_t dest);
+	/* Currently used only by UML, might disappear one day.*/
+#ifdef CONFIG_IRQ_RELEASE_METHOD
 	void (*release)(unsigned int irq, void *dev_id);
+#endif
 };
 
 typedef struct hw_interrupt_type  hw_irq_controller;
_
-
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