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authorJinrong Liang <cloudliang@tencent.com>2022-01-19 22:03:25 +0800
committerPaolo Bonzini <pbonzini@redhat.com>2022-01-20 12:12:47 -0500
commit83a34ad848937462aa64fa3d48f8c0b4034f2503 (patch)
tree306db18edda91bec1b584254b43d9b2e373fbffe /tools/testing/selftests
parenta0f4ba7f51ea736a6b4ccf58563507d7af9128fb (diff)
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')
-rw-r--r--tools/testing/selftests/kvm/lib/x86_64/processor.c1
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;