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KVM: x86/mmu: Use BUILD_BUG_ON_INVALID() for KVM_MMU_WARN_ON() stub

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Use BUILD_BUG_ON_INVALID() instead of an empty do-while loop to stub out
KVM_MMU_WARN_ON() when CONFIG_KVM_PROVE_MMU=n, that way _some_ build
issues with the usage of KVM_MMU_WARN_ON() will be dected even if the
kernel is using the stubs, e.g. basic syntax errors will be detected.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Link: https://lore.kernel.org/r/20230729004722.1056172-11-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2023-07-28 17:47:20 -07:00 committed by Paolo Bonzini
parent 870d4d4ed8
commit 3328dfe0ea
1 changed files with 1 additions and 1 deletions
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2
arch/x86/kvm/mmu/mmu_internal.h
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@ -9,7 +9,7 @@
#ifdef CONFIG_KVM_PROVE_MMU
#define KVM_MMU_WARN_ON(x) WARN_ON_ONCE(x)
#else
#define KVM_MMU_WARN_ON(x) do { } while (0)
#define KVM_MMU_WARN_ON(x) BUILD_BUG_ON_INVALID(x)
#endif
/* Page table builder macros common to shadow (host) PTEs and guest PTEs. */