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authorDavid Woodhouse <dwmw2@infradead.org>2007-02-12 00:52:00 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-12 09:48:28 -0800
commita304e1b82808904c561b7b149b467e338c53fcce (patch)
tree068b68c37f6f11de116288886eb211f267d790f7 /lib
parentf9e4acf3befd3b2903e01b3ef1bd344f03299826 (diff)
downloadlinux-a304e1b82808904c561b7b149b467e338c53fcce.tar.bz2
[PATCH] Debug shared irqs
Drivers registering IRQ handlers with SA_SHIRQ really ought to be able to handle an interrupt happening before request_irq() returns. They also ought to be able to handle an interrupt happening during the start of their call to free_irq(). Let's test that hypothesis.... [bunk@stusta.de: Kconfig fixes] Signed-off-by: David Woodhouse <dwmw2@infradead.org> Cc: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib')
-rw-r--r--lib/Kconfig.debug9
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 356a5ab8279c..63f04c15e6f5 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -77,6 +77,15 @@ config DEBUG_KERNEL
Say Y here if you are developing drivers or trying to debug and
identify kernel problems.
+config DEBUG_SHIRQ
+ bool "Debug shared IRQ handlers"
+ depends on DEBUG_KERNEL && GENERIC_HARDIRQS
+ help
+ Enable this to generate a spurious interrupt as soon as a shared
+ interrupt handler is registered, and just before one is deregistered.
+ Drivers ought to be able to handle interrupts coming in at those
+ points; some don't and need to be caught.
+
config LOG_BUF_SHIFT
int "Kernel log buffer size (16 => 64KB, 17 => 128KB)" if DEBUG_KERNEL
range 12 21