(In reply to Miroslav Bene������ from comment #18) > There is commit e3c11025bcd2 ("s390: avoid using global register for > current_stack_pointer") now. When building with this commit applied, it works. I can boot the built kernel. My env: SLE15-SP1 gcc 7.5 I can sucessfully boot kernel v6.1-rc6, which has the commit applied.