Messages in this thread | | | Subject | RE: [RFC][PATCH] Document what in IRQ is. | Date | Thu, 4 May 2006 01:42:30 -0400 | From | "Brown, Len" <> |
| |
>Linux does not have generic infrastructure to allow two interrupt >sources to share the same token passed to the kernel.
On i386 and x86_64 io_apic.c, see irq_pin_list This advertises to support multiple pins per IRQ.
I suspect this code never runs, and simply adds complexity to code that has no shortage of complexity.
If somebody can explain to me what a "shared ISA-space IRQ" is supposed to be, I'm all ears. I've had a BUG() in this code for a while waiting for it to be used, and never seen it fire.
If we can get rid of that concept, then we have a 1:1 mapping between irqs and apic:pin. Possibly this simplification would be helpful as we re-think how the mapping from cpu:vector -> irq works.
-Len - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |