selftests: kvm: replace ternary operator with min()

Fix the following coccicheck warnings:

tools/testing/selftests/kvm/lib/s390x/ucall.c:25:15-17: WARNING
opportunity for min()
tools/testing/selftests/kvm/lib/x86_64/ucall.c:27:15-17: WARNING
opportunity for min()
tools/testing/selftests/kvm/lib/riscv/ucall.c:56:15-17: WARNING
opportunity for min()
tools/testing/selftests/kvm/lib/aarch64/ucall.c:82:15-17: WARNING
opportunity for min()
tools/testing/selftests/kvm/lib/aarch64/ucall.c:55:20-21: WARNING
opportunity for min()

min() is defined in tools/include/linux/kernel.h.
Signed-off-by: Guo Zhengkui <guozhengkui@vivo.com>
Acked-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Acked-by: Anup Patel <anup@brainfault.org>
Message-Id: <20220511120621.36956-1-guozhengkui@vivo.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

tools/testing/selftests/kvm/lib/aarch64/ucall.c

@@ -52,7 +52,7 @@ void ucall_init(struct kvm_vm *vm, void *arg)
 	 * lower and won't match physical addresses.
 	 */
 	bits = vm->va_bits - 1;
-	bits = vm->pa_bits < bits ? vm->pa_bits : bits;
+	bits = min(vm->pa_bits, bits);
 	end = 1ul << bits;
 	start = end * 5 / 8;
 	step = end / 16;
@@ -79,7 +79,7 @@ void ucall(uint64_t cmd, int nargs, ...)
 	va_list va;
 	int i;
 
-	nargs = nargs <= UCALL_MAX_ARGS ? nargs : UCALL_MAX_ARGS;
+	nargs = min(nargs, UCALL_MAX_ARGS);
 
 	va_start(va, nargs);
 	for (i = 0; i < nargs; ++i)

tools/testing/selftests/kvm/lib/riscv/ucall.c

@@ -53,7 +53,7 @@ void ucall(uint64_t cmd, int nargs, ...)
 	va_list va;
 	int i;
 
-	nargs = nargs <= UCALL_MAX_ARGS ? nargs : UCALL_MAX_ARGS;
+	nargs = min(nargs, UCALL_MAX_ARGS);
 
 	va_start(va, nargs);
 	for (i = 0; i < nargs; ++i)

tools/testing/selftests/kvm/lib/s390x/ucall.c

@@ -22,7 +22,7 @@ void ucall(uint64_t cmd, int nargs, ...)
 	va_list va;
 	int i;
 
-	nargs = nargs <= UCALL_MAX_ARGS ? nargs : UCALL_MAX_ARGS;
+	nargs = min(nargs, UCALL_MAX_ARGS);
 
 	va_start(va, nargs);
 	for (i = 0; i < nargs; ++i)

tools/testing/selftests/kvm/lib/x86_64/ucall.c

@@ -24,7 +24,7 @@ void ucall(uint64_t cmd, int nargs, ...)
 	va_list va;
 	int i;
 
-	nargs = nargs <= UCALL_MAX_ARGS ? nargs : UCALL_MAX_ARGS;
+	nargs = min(nargs, UCALL_MAX_ARGS);
 
 	va_start(va, nargs);
 	for (i = 0; i < nargs; ++i)