Hi Christophe,

Thanks for your answer but I think I don't know how it works with the 
cherry-pick.

$ git bisect start
$ git bisect good 68a32ba14177d4a21c4a9a941cf1d7aea86d436f
$ git bisect bad c70a4be130de333ea079c59da41cc959712bb01c

Bisecting: 2462 revisions left to test after this (roughly 11 steps)
[47a6959fa331fe892a4fc3b48ca08e92045c6bda] netfilter: allow to turn off 
xtables compat layer

$ git cherry-pick 525642624783
error: could not apply 525642624783... powerpc/signal32: Fix erroneous 
SIGSEGV on RT signal return
hint: after resolving the conflicts, mark the corrected paths
hint: with 'git add <paths>' or 'git rm <paths>'
hint: and commit the result with 'git commit'

How can I fix this error?

Thanks,
Christian

On 04 May 2021 at 06:56 am, Christophe Leroy wrote:

Le 04/05/2021 à 00:25, Christian Zigotzky a écrit :

quoted

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.

I'm not sure you can conclude anything here. There is a problem in 
that commit, but it is fixed by 525642624783 ("powerpc/signal32: Fix 
erroneous SIGSEGV on RT signal return") which is the last commit of 
powerpc-5.13-1.

So any bisect from there will for sure point to 887f3ceb51cd 
("powerpc/signal32: Convert do_setcontext[_tm]() to user access 
block") but that's unconclusive. If the problem is still there at the 
HEAD of powerpc-5.13-1, the problem is likely somewhere else.

I think you need to do the bisect again with a cherry-pick of 
525642624783 at each step.

Thanks
Christophe

quoted

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