Messages in this thread | | | Date | Mon, 03 Jan 2011 10:05:15 -0800 | From | "H. Peter Anvin" <> | Subject | Re: [sodaville] [PATCH 02/15] x86: Add device tree support |
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On 01/03/2011 04:20 AM, Sebastian Andrzej Siewior wrote: > Grant Likely wrote: >>> +extern char cmd_line[COMMAND_LINE_SIZE]; >>> +/* This number is used when no interrupt has been assigned */ >>> +#define NO_IRQ (-1) >> >> 0 means NO_IRQ on x86 and most architectures. I will change this when >> I pick up the patch. > > cat /proc/interrupts > CPU0 > 0: 40 IO-APIC-edge timer >
0 for the timer is special. However, Linus has declared that NO_IRQ is to be zero, and that only very special interrupts like the PIT timer are allowed to break that.
-hpa
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