KVM: x86: rename push to emulate_push for consistency

push and emulate_pop are counterparts. Rename push to emulate_push and
harmonize its function signature with emulate_pop. This should remove
a bit of cognitive load when reading this code.

Signed-off-by: Julian Stecklina <julian.stecklina@cyberus-technology.de>
Link: https://lore.kernel.org/r/20231009092054.556935-2-julian.stecklina@cyberus-technology.de
Signed-off-by: Sean Christopherson <seanjc@google.com>

arch/x86/kvm/emulate.c

@@ -1820,22 +1820,22 @@ static int writeback(struct x86_emulate_ctxt *ctxt, struct operand *op)
 	return X86EMUL_CONTINUE;
 }
 
-static int push(struct x86_emulate_ctxt *ctxt, void *data, int bytes)
+static int emulate_push(struct x86_emulate_ctxt *ctxt, const void *data, int len)
 {
 	struct segmented_address addr;
 
-	rsp_increment(ctxt, -bytes);
+	rsp_increment(ctxt, -len);
 	addr.ea = reg_read(ctxt, VCPU_REGS_RSP) & stack_mask(ctxt);
 	addr.seg = VCPU_SREG_SS;
 
-	return segmented_write(ctxt, addr, data, bytes);
+	return segmented_write(ctxt, addr, data, len);
 }
 
 static int em_push(struct x86_emulate_ctxt *ctxt)
 {
 	/* Disable writeback. */
 	ctxt->dst.type = OP_NONE;
-	return push(ctxt, &ctxt->src.val, ctxt->op_bytes);
+	return emulate_push(ctxt, &ctxt->src.val, ctxt->op_bytes);
 }
 
 static int emulate_pop(struct x86_emulate_ctxt *ctxt,
@@ -1921,7 +1921,7 @@ static int em_enter(struct x86_emulate_ctxt *ctxt)
 		return X86EMUL_UNHANDLEABLE;
 
 	rbp = reg_read(ctxt, VCPU_REGS_RBP);
-	rc = push(ctxt, &rbp, stack_size(ctxt));
+	rc = emulate_push(ctxt, &rbp, stack_size(ctxt));
 	if (rc != X86EMUL_CONTINUE)
 		return rc;
 	assign_masked(reg_rmw(ctxt, VCPU_REGS_RBP), reg_read(ctxt, VCPU_REGS_RSP),