linux-kernel - [PATCH] KVM: x86: cleanup unused variables

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Message-Id: <20231029093859.138442-1-jose.pekkarinen@foxhound.fi>
Date:   Sun, 29 Oct 2023 11:38:59 +0200
From:   José Pekkarinen <jose.pekkarinen@...hound.fi>
To:     seanjc@...gle.com, pbonzini@...hat.com, tglx@...utronix.de,
        mingo@...hat.com, bp@...en8.de, dave.hansen@...ux.intel.com,
        skhan@...uxfoundation.org
Cc:     José Pekkarinen <jose.pekkarinen@...hound.fi>,
        x86@...nel.org, hpa@...or.com, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        linux-kernel-mentees@...ts.linuxfoundation.org
Subject: [PATCH] KVM: x86: cleanup unused variables

Reported by coccinelle, the following patch will remove some
redundant variables. This patch will address the following
warnings:

arch/x86/kvm/emulate.c:1315:5-7: Unneeded variable: "rc". Return "X86EMUL_CONTINUE" on line 1330
arch/x86/kvm/emulate.c:4557:5-7: Unneeded variable: "rc". Return "X86EMUL_CONTINUE" on line 4591
arch/x86/kvm/emulate.c:1180:5-7: Unneeded variable: "rc". Return "X86EMUL_CONTINUE" on line 1202

Signed-off-by: José Pekkarinen <jose.pekkarinen@...hound.fi>
---
 arch/x86/kvm/emulate.c | 17 ++++++-----------
 1 file changed, 6 insertions(+), 11 deletions(-)

diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 2673cd5c46cb..c4bb03a88dfe 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -1177,7 +1177,6 @@ static int decode_modrm(struct x86_emulate_ctxt *ctxt,
 {
 	u8 sib;
 	int index_reg, base_reg, scale;
-	int rc = X86EMUL_CONTINUE;
 	ulong modrm_ea = 0;
 
 	ctxt->modrm_reg = ((ctxt->rex_prefix << 1) & 8); /* REX.R */
@@ -1199,16 +1198,16 @@ static int decode_modrm(struct x86_emulate_ctxt *ctxt,
 			op->bytes = 16;
 			op->addr.xmm = ctxt->modrm_rm;
 			kvm_read_sse_reg(ctxt->modrm_rm, &op->vec_val);
-			return rc;
+			return X86EMUL_CONTINUE;
 		}
 		if (ctxt->d & Mmx) {
 			op->type = OP_MM;
 			op->bytes = 8;
 			op->addr.mm = ctxt->modrm_rm & 7;
-			return rc;
+			return X86EMUL_CONTINUE;
 		}
 		fetch_register_operand(op);
-		return rc;
+		return X86EMUL_CONTINUE;
 	}
 
 	op->type = OP_MEM;
@@ -1306,14 +1305,12 @@ static int decode_modrm(struct x86_emulate_ctxt *ctxt,
 		ctxt->memop.addr.mem.ea = (u32)ctxt->memop.addr.mem.ea;
 
 done:
-	return rc;
+	return X86EMUL_CONTINUE;
 }
 
 static int decode_abs(struct x86_emulate_ctxt *ctxt,
 		      struct operand *op)
 {
-	int rc = X86EMUL_CONTINUE;
-
 	op->type = OP_MEM;
 	switch (ctxt->ad_bytes) {
 	case 2:
@@ -1327,7 +1324,7 @@ static int decode_abs(struct x86_emulate_ctxt *ctxt,
 		break;
 	}
 done:
-	return rc;
+	return X86EMUL_CONTINUE;
 }
 
 static void fetch_bit_operand(struct x86_emulate_ctxt *ctxt)
@@ -4554,8 +4551,6 @@ static unsigned imm_size(struct x86_emulate_ctxt *ctxt)
 static int decode_imm(struct x86_emulate_ctxt *ctxt, struct operand *op,
 		      unsigned size, bool sign_extension)
 {
-	int rc = X86EMUL_CONTINUE;
-
 	op->type = OP_IMM;
 	op->bytes = size;
 	op->addr.mem.ea = ctxt->_eip;
@@ -4588,7 +4583,7 @@ static int decode_imm(struct x86_emulate_ctxt *ctxt, struct operand *op,
 		}
 	}
 done:
-	return rc;
+	return X86EMUL_CONTINUE;
 }
 
 static int decode_operand(struct x86_emulate_ctxt *ctxt, struct operand *op,
-- 
2.39.2