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authorKarsten Wiese <annabellesgarden@yahoo.de>2005-09-06 15:17:25 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-07 16:57:29 -0700
commitf26fdd59929e1144c6caf72adcaf4561d6e682a4 (patch)
tree85081e47a7c5943ac1d262e806e4138e14360ecc /include/linux/irq.h
parentf8eeaaf4180334a8e5c3582fe62a5f8176a8c124 (diff)
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[PATCH] CHECK_IRQ_PER_CPU() to avoid dead code in __do_IRQ()
IRQ_PER_CPU is not used by all architectures. This patch introduces the macros ARCH_HAS_IRQ_PER_CPU and CHECK_IRQ_PER_CPU() to avoid the generation of dead code in __do_IRQ(). ARCH_HAS_IRQ_PER_CPU is defined by architectures using IRQ_PER_CPU in their include/asm_ARCH/irq.h file. Through grepping the tree I found the following architectures currently use IRQ_PER_CPU: cris, ia64, ppc, ppc64 and parisc. Signed-off-by: Karsten Wiese <annabellesgarden@yahoo.de> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/irq.h')
-rw-r--r--include/linux/irq.h7
1 files changed, 6 insertions, 1 deletions
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 4a362b9..69681c3 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -32,7 +32,12 @@
#define IRQ_WAITING 32 /* IRQ not yet seen - for autodetection */
#define IRQ_LEVEL 64 /* IRQ level triggered */
#define IRQ_MASKED 128 /* IRQ masked - shouldn't be seen again */
-#define IRQ_PER_CPU 256 /* IRQ is per CPU */
+#if defined(ARCH_HAS_IRQ_PER_CPU)
+# define IRQ_PER_CPU 256 /* IRQ is per CPU */
+# define CHECK_IRQ_PER_CPU(var) ((var) & IRQ_PER_CPU)
+#else
+# define CHECK_IRQ_PER_CPU(var) 0
+#endif
/*
* Interrupt controller descriptor. This is all we need
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