Re: [PATCH] KVM: arm64: nVHE: gen-hyprel: Silent build warnings

[tianjia.zhang]

On 10/9/24 7:07 PM, Marc Zyngier wrote:
> On Wed, 09 Oct 2024 09:57:51 +0100,
> Tianjia Zhang <tianjia.zhang@xxxxxxxxxxxxxxxxx> wrote:
> > This patch silent the some mismatch format build warnings
> > with clang, like:
> >
> >    arch/arm64/kvm/hyp/nvhe/gen-hyprel.c:233:2: warning: format specifies
> >    type 'unsigned long' but the argument has type 'Elf64_Off'
> >    (aka 'unsigned long long') [-Wformat]
> >      233 |         assert_ne(off, 0UL, "%lu");
> >          |         ^~~~~~~~~~~~~~~~~~~~~~~~~~
> >          |                              %llu
> >    arch/arm64/kvm/hyp/nvhe/gen-hyprel.c:193:34: note: expanded from macro 'assert_ne'
> >      193 | #define assert_ne(lhs, rhs, fmt)        assert_op(lhs, rhs, fmt, !=)
> >          |                                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
> >    arch/arm64/kvm/hyp/nvhe/gen-hyprel.c:188:19: note: expanded from macro 'assert_op'
> >      187 |                                 " failed (lhs=" fmt ", rhs=" fmt        \
> >          |                                                 ~~~
> >      188 |                                 ", line=%d)", _lhs, _rhs, __LINE__);    \
> >          |                                               ^~~~
> >    arch/arm64/kvm/hyp/nvhe/gen-hyprel.c:167:17: note: expanded from macro 'fatal_error'
> >      166 |                 fprintf(stderr, "error: %s: " fmt "\n",                 \
> >          |                                               ~~~
> >      167 |                         elf.path, ## __VA_ARGS__);                      \
> >          |                                      ^~~~~~~~~~~
> >
> > Signed-off-by: Tianjia Zhang <tianjia.zhang@xxxxxxxxxxxxxxxxx>
>
> I don't see these warnings. What version of LLVM are you using?

I compiled the kernel on Apple Silicon M3 Pro in macOS 15.0.1, Maybe this is
a special scenario that is rarely used.

Details of clang:

    # clang --version
    Homebrew clang version 19.1.1
    Target: arm64-apple-darwin24.0.0
    Thread model: posix
    InstalledDir: /opt/homebrew/Cellar/llvm/19.1.1/bin

Cheers,
Tianjia