Messages in this thread | | | From | Linus Torvalds <> | Date | Mon, 18 Oct 2021 20:27:02 -1000 | Subject | Re: [PATCH] platform/x86: thinkpad_acpi: Fix bitwise vs. logical warning |
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On Mon, Oct 18, 2021 at 7:00 PM Nathan Chancellor <nathan@kernel.org> wrote: > > For what it's worth, the suggested fix is the '||' underneath the > warning text: > > In file included from arch/x86/kvm/mmu/tdp_iter.c:5: > arch/x86/kvm/mmu/spte.h:318:9: error: use of bitwise '|' with boolean operands [-Werror,-Wbitwise-instead-of-logical] > return __is_bad_mt_xwr(rsvd_check, spte) | > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > || > arch/x86/kvm/mmu/spte.h:318:9: note: cast one or both operands to int to silence this warning > 1 error generated.
Hmm. That's not at all obvious.
The *much* bigger part is that
note: cast one or both operands to int to silence this warning
which is what I'm complaining about. That note should die. It should say "maybe you meant to use a logical or" or something like that.
> Perhaps that hint should also be added to the warning text, like: > > In file included from arch/x86/kvm/mmu/tdp_iter.c:5: > arch/x86/kvm/mmu/spte.h:318:9: error: use of bitwise '|' with boolean operands; did you mean logical '||'? [-Werror,-Wbitwise-instead-of-logical] > return __is_bad_mt_xwr(rsvd_check, spte) | > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > || > arch/x86/kvm/mmu/spte.h:318:9: note: cast one or both operands to int to silence this warning
I don't understand why you seem to continue to ignore the "note" message, which makes a completely crazy suggestion.
Linus
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