diff options
| author | Ralf Baechle <ralf@linux-mips.org> | 2008-02-08 04:22:01 -0800 |
|---|---|---|
| committer | Chris Wright <chrisw@sous-sol.org> | 2008-03-24 11:47:09 -0700 |
| commit | 6224c2148e2d6df8d537f081e31381a18eee918e (patch) | |
| tree | e450ca69ea23e705ac4d6e8cbdb726d4cb418c71 /include | |
| parent | 11b47c8828d4cd1df21636719603784ec5e26067 (diff) | |
IRQ_NOPROBE helper functions
Probing non-ISA interrupts using the handle_percpu_irq as their handle_irq
method may crash the system because handle_percpu_irq does not check
IRQ_WAITING. This for example hits the MIPS Qemu configuration.
This patch provides two helper functions set_irq_noprobe and set_irq_probe to
set rsp. clear the IRQ_NOPROBE flag. The only current caller is MIPS code
but this really belongs into generic code.
As an aside, interrupt probing these days has become a mostly obsolete if not
dangerous art. I think Linux interrupts should be changed to default to
non-probing but that's subject of this patch.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Acked-and-tested-by: Rob Landley <rob@landley.net>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/irq.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/irq.h b/include/linux/irq.h index 4669be080617..1fc1cb8698ab 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -367,6 +367,9 @@ set_irq_chained_handler(unsigned int irq, __set_irq_handler(irq, handle, 1, NULL); } +extern void set_irq_noprobe(unsigned int irq); +extern void set_irq_probe(unsigned int irq); + /* Handle dynamic irq creation and destruction */ extern int create_irq(void); extern void destroy_irq(unsigned int irq); |