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| author | Ralf Baechle <ralf@linux-mips.org> | 2008-02-08 04:22:01 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-08 09:22:42 -0800 |
| commit | 46f4f8f665080900e865392f4b3593be463bf0d8 (patch) | |
| tree | d4d1cb04b461b4ddd841396647d911fdc08819ef /include/linux/irq.h | |
| parent | 922f9cfa79b52c85b6002d96cb0eefd13437c58c (diff) | |
| download | lwn-46f4f8f665080900e865392f4b3593be463bf0d8.tar.gz lwn-46f4f8f665080900e865392f4b3593be463bf0d8.zip | |
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>
Diffstat (limited to 'include/linux/irq.h')
| -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 a19b381d4112..bfd9efb5cb49 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); |