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Subject[PATCH 2/5] Ensure NO_IRQ is appropriately defined on all architectures
Date
Add a default definition of NO_IRQ to <linux/hardirq.h> and make the
definition in <asm/hardirq.h> uniform across all architectures which
define it.

Signed-off-by: Matthew Wilcox <matthew@wil.cx>

---

include/asm-arm/irq.h | 5 +----
include/asm-arm26/irq.h | 5 +----
include/asm-frv/irq.h | 2 +-
include/asm-parisc/irq.h | 2 +-
include/asm-powerpc/irq.h | 2 +-
include/linux/hardirq.h | 10 ++++++++++
6 files changed, 15 insertions(+), 11 deletions(-)

applies-to: 48ad7d3f9b055a9d4c1a1ab1f6dd0a584cfed99c
8a7e8c26051c3abef81eb155c8a721716e24cc26
diff --git a/include/asm-arm/irq.h b/include/asm-arm/irq.h
index 59975ee..4ea980e 100644
--- a/include/asm-arm/irq.h
+++ b/include/asm-arm/irq.h
@@ -12,12 +12,9 @@
#endif

/*
- * Use this value to indicate lack of interrupt
- * capability
+ * Use this value to indicate lack of interrupt capability
*/
-#ifndef NO_IRQ
#define NO_IRQ ((unsigned int)(-1))
-#endif

struct irqaction;

diff --git a/include/asm-arm26/irq.h b/include/asm-arm26/irq.h
index 06bd5a5..88e8ab7 100644
--- a/include/asm-arm26/irq.h
+++ b/include/asm-arm26/irq.h
@@ -15,12 +15,9 @@


/*
- * Use this value to indicate lack of interrupt
- * capability
+ * Use this value to indicate lack of interrupt capability
*/
-#ifndef NO_IRQ
#define NO_IRQ ((unsigned int)(-1))
-#endif

struct irqaction;

diff --git a/include/asm-frv/irq.h b/include/asm-frv/irq.h
index 2c16d8d..018ef9b 100644
--- a/include/asm-frv/irq.h
+++ b/include/asm-frv/irq.h
@@ -21,7 +21,7 @@
*/

/* this number is used when no interrupt has been assigned */
-#define NO_IRQ (-1)
+#define NO_IRQ ((unsigned int)(-1))

#define NR_IRQ_LOG2_ACTIONS_PER_GROUP 5
#define NR_IRQ_ACTIONS_PER_GROUP (1 << NR_IRQ_LOG2_ACTIONS_PER_GROUP)
diff --git a/include/asm-parisc/irq.h b/include/asm-parisc/irq.h
index b0a30e2..d8de7cf 100644
--- a/include/asm-parisc/irq.h
+++ b/include/asm-parisc/irq.h
@@ -11,7 +11,7 @@
#include <linux/cpumask.h>
#include <asm/types.h>

-#define NO_IRQ (-1)
+#define NO_IRQ ((unsigned int)(-1))

#ifdef CONFIG_GSC
#define GSC_IRQ_BASE 16
diff --git a/include/asm-powerpc/irq.h b/include/asm-powerpc/irq.h
index 8eb7e85..61579c0 100644
--- a/include/asm-powerpc/irq.h
+++ b/include/asm-powerpc/irq.h
@@ -16,7 +16,7 @@
#include <asm/atomic.h>

/* this number is used when no interrupt has been assigned */
-#define NO_IRQ (-1)
+#define NO_IRQ ((unsigned int)(-1))

/*
* These constants are used for passing information about interrupt
diff --git a/include/linux/hardirq.h b/include/linux/hardirq.h
index 71d2b8a..510d71b 100644
--- a/include/linux/hardirq.h
+++ b/include/linux/hardirq.h
@@ -5,6 +5,7 @@
#include <linux/preempt.h>
#include <linux/smp_lock.h>
#include <asm/hardirq.h>
+#include <asm/irq.h>
#include <asm/system.h>

/*
@@ -87,6 +88,15 @@ extern void synchronize_irq(unsigned int
# define synchronize_irq(irq) barrier()
#endif

+/*
+ * This value means "Device has no interrupt". The value 0 has
+ * historically been used, but it's a legal interrupt number on some
+ * architectures. These architectures typically define it to be -1 instead.
+ */
+#ifndef NO_IRQ
+#define NO_IRQ ((unsigned int)0)
+#endif
+
#define nmi_enter() irq_enter()
#define nmi_exit() sub_preempt_count(HARDIRQ_OFFSET)

---
0.99.8.GIT
-
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