diff options
| author | Wei Wang <wei.w.wang@intel.com> | 2023-03-07 21:52:33 +0800 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2023-06-01 13:36:37 -0700 |
| commit | c9d601548603c54919a3b1333c5b972252b4031d (patch) | |
| tree | 375a7bab3f86115f75d993002ee7e18dd2fb6372 | |
| parent | 76021e96d781e1fe8de02ebe52f3eb276716b6b0 (diff) | |
KVM: allow KVM_BUG/KVM_BUG_ON to handle 64-bit cond
Current KVM_BUG and KVM_BUG_ON assume that 'cond' passed from callers is
32-bit as it casts 'cond' to the type of int. This will be wrong if 'cond'
provided by a caller is 64-bit, e.g. an error code of 0xc0000d0300000000
will be converted to 0, which is not expected.
Improves the implementation by using bool in KVM_BUG and KVM_BUG_ON.
'bool' is preferred to 'int' as __ret is essentially used as a boolean
and coding-stytle.rst documents that use of bool is encouraged to improve
readability and is often a better option than 'int' for storing boolean
values.
Fixes: 0b8f11737cff ("KVM: Add infrastructure and macro to mark VM as bugged")
Signed-off-by: Wei Wang <wei.w.wang@intel.com>
Reviewed-by: Mingwei Zhang <mizhang@google.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Link: https://lore.kernel.org/r/20230307135233.54684-1-wei.w.wang@intel.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
| -rw-r--r-- | include/linux/kvm_host.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 0e571e973bc2..2dc604af1ac1 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -849,7 +849,7 @@ static inline void kvm_vm_bugged(struct kvm *kvm) #define KVM_BUG(cond, kvm, fmt...) \ ({ \ - int __ret = (cond); \ + bool __ret = !!(cond); \ \ if (WARN_ONCE(__ret && !(kvm)->vm_bugged, fmt)) \ kvm_vm_bugged(kvm); \ @@ -858,7 +858,7 @@ static inline void kvm_vm_bugged(struct kvm *kvm) #define KVM_BUG_ON(cond, kvm) \ ({ \ - int __ret = (cond); \ + bool __ret = !!(cond); \ \ if (WARN_ON_ONCE(__ret && !(kvm)->vm_bugged)) \ kvm_vm_bugged(kvm); \ |