Re: [RFC PATCH 1/2] objtool/LoongArch: Fix fall through warning about efi_boot_kernel()

[Tiezhu Yang]

On 2025/8/27 上午7:39, Josh Poimboeuf wrote:
> On Tue, Aug 26, 2025 at 09:03:34PM +0800, Huacai Chen wrote:

...

> > Then I think objtool needs to be improved to handle this case, this
> > problem is not arch specific.
>
> Yeah, objtool should really be ignoring this code altogether.  On x86,
> that's not a problem because the EFI stub code isn't linked into
> vmlinux.o.  It gets linked in separately:
>
>    $ git grep vmlinux-libs
>    arch/x86/boot/compressed/Makefile:vmlinux-libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
>    arch/x86/boot/compressed/Makefile:vmlinux-libs-$(CONFIG_X86_64) += $(objtree)/arch/x86/boot/startup/lib.a
>    arch/x86/boot/compressed/Makefile:$(obj)/vmlinux: $(vmlinux-objs-y) $(vmlinux-libs-y) FORCE
>
> IMO, the proper fix is to change the loongarch build to do the same.
> vmlinux.o is intended to be proper kernel code.

Thank you very much, that is to say, these EFISTUB functions can be
ignored by objtool, I will do it.

Thanks,
Tiezhu