On 1/19/22 15:03, Jinrong Liang wrote:
From: Jinrong Liang <cloudliang@xxxxxxxxxxx>
The following warning appears when executing
make -C tools/testing/selftests/kvm
In file included from lib/x86_64/processor.c:11:
lib/x86_64/processor.c: In function ':
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@xxxxxxxxxxx>
---
tools/testing/selftests/kvm/lib/x86_64/processor.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c
index 59dcfe1967cc..4a4c7945cf3e 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/processor.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c
@@ -1520,7 +1520,7 @@ unsigned long vm_compute_max_gfn(struct kvm_vm *vm)
{
const unsigned long num_ht_pages = 12 << (30 - vm->page_shift); /* 12 GiB */
unsigned long ht_gfn, max_gfn, max_pfn;
- uint32_t eax, ebx, ecx, edx, max_ext_leaf;
+ uint32_t eax, ebx, ecx = 0, edx, max_ext_leaf;
max_gfn = (1ULL << (vm->pa_bits - vm->page_shift)) - 1;
A separate assignment of "ecx = 0" is slightly more conforming to the
coding standards. Queued nevertheless, thanks.
Paolo
