On Tue, Dec 06, 2011 at 12:00:12PM +0100, Geert Uytterhoeven wrote:

On Tue, Dec 6, 2011 at 11:46, Russell King - ARM Linux
[off-list ref] wrote:

quoted

But.. let's make one thing clear: Alan Cox and Linus have been going on
about how IRQ0 should not be used. ?Let's be crystal clear: even x86
uses IRQ0. ?It happens to be the PIC timer, and that gets claimed early
on during the x86 boot. ?So please don't tell me that x86 avoids IRQ0.
It doesn't. ?It just happens that x86 never shows IRQ0 to anything but
the i8253 PIC driver.

It's shown in /proc/interrupts due to a "bug" in show_interrupts().
The (gmail damaged) patch below fixes this bug.

So we now try to hide the fact that there _is_ an interrupt called 0
on x86 systems?  Sorry, I can't that that seriously in any way.