Re: [PATCH v4 0/4] objtool: Fix INSN_CONTEXT_SWITCH

[Ingo Molnar]

* Josh Poimboeuf <jpoimboe@xxxxxxxxxx> wrote:

> I decided to keep the "unsupported instruction in callable function"
> warning, it's not hurting anything.  As a result we now have
> INSN_SYSCALL and INSN_SYSRET.
> 
> v4:
> - split up patches
> - don't get rid of "unsupported instruction in callable function" warning
> - split INSN_CONTEXT_SWITCH -> INSN_SYSCALL / INSN_SYSRET
> 
> v3: https://lore.kernel.org/9b23e4413873bee38961e628b0c73f6d3a26d494.1743799705.git.jpoimboe@xxxxxxxxxx
> 
> Josh Poimboeuf (4):
>   objtool: Fix INSN_CONTEXT_SWITCH handling in validate_unret()
>   objtool: Split INSN_CONTEXT_SWITCH into INSN_SYSCALL and INSN_SYSRET
>   objtool: Stop UNRET validation on UD2
>   objtool, xen: Fix INSN_SYSCALL / INSN_SYSRET semantics
> 
>  arch/x86/xen/xen-asm.S               |  4 +---
>  tools/objtool/arch/x86/decode.c      | 18 ++++++++++-------
>  tools/objtool/check.c                | 29 +++++++++++++++++++++-------
>  tools/objtool/include/objtool/arch.h |  3 ++-
>  4 files changed, 36 insertions(+), 18 deletions(-)

I'm wondering about the timing: can this wait for v6.16, or does it 
trigger on some popular config/build-tools combination?

Thanks,

	Ingo