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authorBernhard Walle <bwalle@suse.de>2007-05-08 03:35:24 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-08 14:15:22 -0400
commitd85a60d85ea5b7c597508c1510c88e657773d378 (patch)
tree2b5d1a5311074de8c12811e7ddf26e3cda4a41a0 /include
parent951744fea0aea9adbd7c8cacb3605f2d69a66f96 (diff)
Add IRQF_IRQPOLL flag (common code)
irqpoll is broken on some architectures that don't use the IRQ 0 for the timer interrupt like IA64. This patch adds a IRQF_IRQPOLL flag. Each architecture is handled in a separate pach. As I left the irq == 0 as condition, this should not break existing architectures that use timer_irq == 0 and that I did't address with that patch (because I don't know). This patch: This patch adds a IRQF_IRQPOLL flag that the interrupt registration code could use for the interrupt it wants to use for IRQ polling. Because this must not be the timer interrupt, an additional flag was added instead of re-using the IRQF_TIMER constant. Until all architectures will have an IRQF_IRQPOLL interrupt, irq == 0 will stay as alternative as it should not break anything. Also, note_interrupt() is called on CPU-specific interrupts to be used as interrupt source for IRQ polling. Signed-off-by: Bernhard Walle <bwalle@suse.de> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Matthew Wilcox <willy@debian.org> Cc: Grant Grundler <grundler@google.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/interrupt.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index 80e63d8e9b15..f7b01b9a35b3 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -44,6 +44,9 @@
44 * IRQF_TIMER - Flag to mark this interrupt as timer interrupt 44 * IRQF_TIMER - Flag to mark this interrupt as timer interrupt
45 * IRQF_PERCPU - Interrupt is per cpu 45 * IRQF_PERCPU - Interrupt is per cpu
46 * IRQF_NOBALANCING - Flag to exclude this interrupt from irq balancing 46 * IRQF_NOBALANCING - Flag to exclude this interrupt from irq balancing
47 * IRQF_IRQPOLL - Interrupt is used for polling (only the interrupt that is
48 * registered first in an shared interrupt is considered for
49 * performance reasons)
47 */ 50 */
48#define IRQF_DISABLED 0x00000020 51#define IRQF_DISABLED 0x00000020
49#define IRQF_SAMPLE_RANDOM 0x00000040 52#define IRQF_SAMPLE_RANDOM 0x00000040
@@ -52,6 +55,7 @@
52#define IRQF_TIMER 0x00000200 55#define IRQF_TIMER 0x00000200
53#define IRQF_PERCPU 0x00000400 56#define IRQF_PERCPU 0x00000400
54#define IRQF_NOBALANCING 0x00000800 57#define IRQF_NOBALANCING 0x00000800
58#define IRQF_IRQPOLL 0x00001000
55 59
56/* 60/*
57 * Migration helpers. Scheduled for removal in 9/2007 61 * Migration helpers. Scheduled for removal in 9/2007