irqdomain: Include hwirq number in /proc/interrupts
authorGrant Likely <grant.likely@secretlab.ca>
Thu, 26 Jan 2012 23:29:19 +0000 (16:29 -0700)
committerGrant Likely <grant.likely@linaro.org>
Mon, 24 Jun 2013 13:02:42 +0000 (14:02 +0100)
commitc12d2f42a96d72cffa4d9335ca455a2243333c79
tree9ffffd9cac1dc7cac0f0ebe63c80e48ead4a9df8
parentd3dcb436f61593843af178d4a520c8c43c04d3fc
irqdomain: Include hwirq number in /proc/interrupts

Add the hardware interrupt number to the output of /proc/interrupts.
It is often important to have access to the hardware interrupt number because
it identifies exactly how an interrupt signal is wired up to the interrupt
controller.  This is especially important when using irq_domains since irq
numbers get dynamically allocated in that case, and have no relation to the
actual hardware number.

Note: This output is currently conditional on whether or not the irq_domain
pointer is set; however hwirq could still be used without irq_domain.  It
may be worthwhile to always output the hwirq number regardless of the
domain pointer.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Tested-by: Olof Johansson <olof@lixom.net>
Cc: Ben Herrenschmidt <benh@kernel.crashing.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
kernel/irq/proc.c