Re: VM86 interrupt emulation breakage and FIXes for 2.6.x kernel series

Linus Torvalds
2004-12-10T22:55:59Z

On Fri, 10 Dec 2004, Alan Cox wrote:
>
> You can't disable_irq and return to user space - the IRQ may be shared
> by a device needed to make user space progress.

The vm86 interrupt does not allow sharing. And it really _has_ to be
disabled until user mode has cleared the irq source, or you'll have a very
dead machine.

Linus