On Wed, Jul 19, 2023 at 05:21:11PM +0200, Petr Mladek wrote: > This patch broke livepatching. Kthreads never have a reliable stack. > It works when I revert it. > > +SYM_CODE_START(ret_from_fork_asm) > > + UNWIND_HINT_REGS It works again when I change the above hint to UNWIND_HINT_END_OF_STACK, so yeah. Doing this makes objtool unhappy with something else though, so I'll go prod at things with something sharp... Thanks! > > ANNOTATE_NOENDBR // copy_thread > > CALL_DEPTH_ACCOUNT > > > > + movq %rax, %rdi /* prev */ > > + movq %rsp, %rsi /* regs */ > > + movq %rbx, %rdx /* fn */ > > + movq %r12, %rcx /* fn_arg */ > > + call ret_from_fork > > > > +SYM_CODE_END(ret_from_fork_asm)
