linux-toradex.git/include/linux/irqdesc.h, branch v3.0.22

genirq: Uninline and sanity check generic_handle_irq()

2011-05-18T12:59:08+00:00

generic_handle_irq() is missing a NULL pointer check for the result of
irq_to_desc. This was a not a big problem, but we want to expose it to
drivers, so we better have sanity checks in place. Add a return value
as well, which indicates that the irq number was valid and the handler
was invoked.

Based on the pure code move from Jonathan Cameron.

Signed-off-by: Thomas Gleixner 
Cc: Jonathan Cameron

genirq: irq_desc: Document preflow_handler and affinity_hint

2011-04-23T13:56:24+00:00

[ tglx: Filled in the FIXME place holders ]

Signed-off-by: Geert Uytterhoeven 
Link: http://lkml.kernel.org/r/%3C1302426113-13808-2-git-send-email-geert%40linux-m68k.org%3E
Signed-off-by: Thomas Gleixner

genirq: Forgotten updates/deletions after removal of compat code

2011-04-23T13:56:23+00:00

commit 0c6f8a8b917ad361319c8ace3e9f28e69bfdb4c1 ("genirq: Remove compat code")
removed the compat code, but forgot to update some references in comments and
delete some of its documentation.

Signed-off-by: Geert Uytterhoeven 
Link: http://lkml.kernel.org/r/%3C1302426113-13808-1-git-send-email-geert%40linux-m68k.org%3E
Signed-off-by: Thomas Gleixner

genirq: Remove compat code

2011-03-29T12:48:19+00:00

Signed-off-by: Thomas Gleixner

genirq: Provide locked setter for chip, handler, name

2011-03-23T19:22:06+00:00

Some irq_set_type() callbacks need to change the chip and the handler
when the trigger mode changes. We have already a (misnomed) setter
function for the handler which can be called from irq_set_type().

Provide one which allows to set chip and name as well. Put the
misnomed function under the COMPAT switch and provide a replacement.

Signed-off-by: Thomas Gleixner

genirq: Provide a lockdep helper

2011-03-23T19:22:06+00:00

Some irq chips need to call genirq functions for nested chips from
their callbacks. That upsets lockdep. So they need to set a different
lock class for those nested chips. Provide a helper function to avoid
open access to irq_desc.

Signed-off-by: Thomas Gleixner

genirq; Remove the last leftovers of the old sparse irq code

2011-03-23T19:22:06+00:00

All users converted. Get rid of it.

Signed-off-by: Thomas Gleixner

genirq: Add desc->irq_data accessor

2011-03-11T13:15:35+00:00

We have accessors for all fields in irq_data based on irq_desc, but
not for irq_data itself.

Signed-off-by: Thomas Gleixner

genirq: Prepare the handling of shared oneshot interrupts

2011-02-25T19:24:21+00:00

For level type interrupts we need to track how many threads are on
flight to avoid useless interrupt storms when not all thread handlers
have finished yet. Keep track of the woken threads and only unmask
when there are no more threads in flight.

Yes, I'm lazy and using a bitfield. But not only because I'm lazy, the
main reason is that it's way simpler than using a refcount. A refcount
based solution would need to keep track of various things like
crashing the irq thread, spurious interrupts coming in,
disables/enables, free_irq() and some more. The bitfield keeps the
tracking simple and makes things just work. It's also nicely confined
to the thread code pathes and does not require additional checks all
over the place.

Signed-off-by: Thomas Gleixner 
Cc: Peter Zijlstra 
LKML-Reference: <20110223234956.388095876@linutronix.de>

genirq: Add preflow handler support

2011-02-19T11:58:24+00:00

sparc64 needs to call a preflow handler on certain interrupts befor
calling the action chain. Integrate it into handle_fasteoi_irq. Must
be enabled via CONFIG_IRQ_FASTEOI_PREFLOW. No impact when disabled.

Signed-off-by: Thomas Gleixner 
Cc: David S. Miller