[PATCH] Add exception handling

[cgel . zte]

From: Yang Guang <yang.guang5@xxxxxxxxxx>

If the type is abnormal input from argument, the code will be NULL.
So it should return as default;

Signed-off-by: Yang Guang <yang.guang5@xxxxxxxxxx>
---
 arch/x86/kernel/static_call.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/kernel/static_call.c b/arch/x86/kernel/static_call.c
index f608e6710300..696da3eccf28 100644
--- a/arch/x86/kernel/static_call.c
+++ b/arch/x86/kernel/static_call.c
@@ -45,6 +45,8 @@ static void __ref __static_call_transform(void *insn, enum insn_type type, void
 		code = text_gen_insn(RET_INSN_OPCODE, insn, func);
 		size = RET_INSN_SIZE;
 		break;
+	default:
+		return;
 	}
 
 	if (memcmp(insn, code, size) == 0)
-- 
2.25.1