Hello,

Xorg always restarts again and again after the the PowerPC updates 
5.13-1 [1] on my FSL P5040 Cyrus+ board (A-EON AmigaOne X5000) [2]. Xorg 
doesn't start anymore in a virtual e5500 QEMU machine [3].

I bisected today [4].

Result: powerpc/signal32: Convert do_setcontext[_tm]() to user access 
block (887f3ceb51cd34109ac17bfc98695162e299e657) [5] is the first bad 
commit.

Please find attached the kernel config.

Please check the first bad commit.

Thanks,
Christian

[1] 
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c70a4be130de333ea079c59da41cc959712bb01c
[2] http://wiki.amiga.org/index.php?title=X5000
[3] qemu-system-ppc64 -M ppce500 -cpu e5500 -m 1024 -kernel uImage 
-drive format=raw,file=fedora28-2.img,index=0,if=virtio -netdev 
user,id=mynet0 -device virtio-net-pci,netdev=mynet0 -append "rw 
root=/dev/vda" -device virtio-vga -usb -device usb-ehci,id=ehci -device 
usb-tablet -device virtio-keyboard-pci -smp 4 -vnc :1
[4] https://forum.hyperion-entertainment.com/viewtopic.php?p=53101#p53101
[5] 
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=887f3ceb51cd34109ac17bfc98695162e299e657