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| author | Radim Krčmář <rkrcmar@redhat.com> | 2017-09-13 15:13:46 +0200 |
|---|---|---|
| committer | Radim Krčmář <rkrcmar@redhat.com> | 2017-09-13 16:40:24 +0200 |
| commit | 5153723388c8691b886eb9ad28dde92c01f9b191 (patch) | |
| tree | 249d9f1eeff7461de46d73fa16c18b7e729de166 /arch | |
| parent | 021086e383fa408a219f6c6541b37f495f59d576 (diff) | |
KVM: x86: fix clang build
Clang resolves __builtin_constant_p() to false even if the expression is
constant in the end. The only purpose of that expression was to
differentiate a case where the following expression couldn't be checked
at compile-time, so we can just remove the check.
Clang handles the following two correctly. Turn it into BUG_ON if there
are any more problems with this.
Fixes: d6321d493319 ("KVM: x86: generalize guest_cpuid_has_ helpers")
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/cpuid.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/x86/kvm/cpuid.h b/arch/x86/kvm/cpuid.h index 1ea3c0e1e3a9..0bc5c1315708 100644 --- a/arch/x86/kvm/cpuid.h +++ b/arch/x86/kvm/cpuid.h @@ -59,7 +59,6 @@ static __always_inline struct cpuid_reg x86_feature_cpuid(unsigned x86_feature) { unsigned x86_leaf = x86_feature / 32; - BUILD_BUG_ON(!__builtin_constant_p(x86_leaf)); BUILD_BUG_ON(x86_leaf >= ARRAY_SIZE(reverse_cpuid)); BUILD_BUG_ON(reverse_cpuid[x86_leaf].function == 0); |