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-rw-r--r--tools/testing/selftests/kvm/lib/x86_64/ucall.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/testing/selftests/kvm/lib/x86_64/ucall.c b/tools/testing/selftests/kvm/lib/x86_64/ucall.c
index 4bfc9a90b1de..da4d89ad5419 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/ucall.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/ucall.c
@@ -32,7 +32,7 @@ void ucall(uint64_t cmd, int nargs, ...)
va_end(va);
asm volatile("in %[port], %%al"
- : : [port] "d" (UCALL_PIO_PORT), "D" (&uc) : "rax");
+ : : [port] "d" (UCALL_PIO_PORT), "D" (&uc) : "rax", "memory");
}
uint64_t get_ucall(struct kvm_vm *vm, uint32_t vcpu_id, struct ucall *uc)