[PATCH] arch/{mips,sparc,microblaze,powerpc}: Don't enable pagefault/preempt twice

[Al Viro]

On Fri, May 22, 2020 at 02:29:50AM +0100, Al Viro wrote:
> On Thu, May 21, 2020 at 06:11:08PM -0700, Guenter Roeck wrote:
> 
> > Mainline, with:
> > 
> > qemu-system-sparc -M SS-4 -kernel arch/sparc/boot/zImage -no-reboot \
> > 	-snapshot -drive file=rootfs.ext2,format=raw,if=scsi \
> > 	-append "panic=-1 slub_debug=FZPUA root=/dev/sda console=ttyS0"
> > 	-nographic -monitor none
> > 
> > The machine doesn't really matter, though.
> 
> It does, unfortunately - try that with SS-10 and watch what happens ;-/

Ugh...  It's actually something in -m handling: -m 256 passes, -m 512
leads to that panic.