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| author |   Jinrong Liang <cloudliang@tencent.com> | 2022-01-19 22:03:25 +0800 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2022-01-20 12:12:47 -0500 |
| commit | 83a34ad848937462aa64fa3d48f8c0b4034f2503 (patch) | |
| tree | 306db18edda91bec1b584254b43d9b2e373fbffe /tools/testing/selftests/kvm/lib | |
| parent | selftests: kvm/x86: Fix the warning in pmu_event_filter_test.c (diff) | |
| download | linux-dev-83a34ad848937462aa64fa3d48f8c0b4034f2503.tar.xz linux-dev-83a34ad848937462aa64fa3d48f8c0b4034f2503.zip | |
selftests: kvm/x86: Fix the warning in lib/x86_64/processor.c
The following warning appears when executing
make -C tools/testing/selftests/kvm
include/x86_64/processor.h:290:2: warning: 'ecx' may be used uninitialized in this
function [-Wmaybe-uninitialized]
asm volatile("cpuid"
^~~
lib/x86_64/processor.c:1523:21: note: 'ecx' was declared here
uint32_t eax, ebx, ecx, edx, max_ext_leaf;
Just initialize ecx to remove this warning.
Fixes: c8cc43c1eae2 ("selftests: KVM: avoid failures due to reserved HyperTransport region")
Signed-off-by: Jinrong Liang <cloudliang@tencent.com>
Message-Id: <20220119140325.59369-1-cloudliang@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools/testing/selftests/kvm/lib')
| -rw-r--r-- | tools/testing/selftests/kvm/lib/x86_64/processor.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c index 5c8c270a9158..5f9d7e91dc69 100644 --- a/tools/testing/selftests/kvm/lib/x86_64/processor.c +++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c @@ -1535,6 +1535,7 @@ unsigned long vm_compute_max_gfn(struct kvm_vm *vm) /* Before family 17h, the HyperTransport area is just below 1T. */ ht_gfn = (1 << 28) - num_ht_pages; eax = 1; + ecx = 0; cpuid(&eax, &ebx, &ecx, &edx); if (x86_family(eax) < 0x17) goto done; |