512 	char		*expr[TRACING_MAP_VARS_MAX];  member
1717 static void expr_field_str(struct hist_field *field, char *expr)  in expr_field_str()  argument
1720 		strcat(expr, "$");  in expr_field_str()
1725 		strcat(expr, str);  in expr_field_str()
1728 	strcat(expr, hist_field_name(field, 0));  in expr_field_str()
1734 			strcat(expr, ".");  in expr_field_str()
1735 			strcat(expr, flags_str);  in expr_field_str()
1742 	char *expr;  in expr_str()  local
1747 	expr = kzalloc(MAX_FILTER_STR_VAL, GFP_KERNEL);  in expr_str()
1748 	if (!expr)  in expr_str()
1752 		expr_field_str(field, expr);  in expr_str()
1753 		return expr;  in expr_str()
1759 		strcat(expr, "-(");  in expr_str()
1762 			kfree(expr);  in expr_str()
1765 		strcat(expr, subexpr);  in expr_str()
1766 		strcat(expr, ")");  in expr_str()
1770 		return expr;  in expr_str()
1773 	expr_field_str(field->operands[0], expr);  in expr_str()
1777 		strcat(expr, "-");  in expr_str()
1780 		strcat(expr, "+");  in expr_str()
1783 		strcat(expr, "/");  in expr_str()
1786 		strcat(expr, "*");  in expr_str()
1789 		kfree(expr);  in expr_str()
1793 	expr_field_str(field->operands[1], expr);  in expr_str()
1795 	return expr;  in expr_str()
2218 			field = hist_data->attrs->var_defs.expr[i];  in field_name_from_var()
2501 	struct hist_field *operand1, *expr = NULL;  in parse_unary()  local
2544 	expr = create_hist_field(hist_data, NULL, flags, var_name);  in parse_unary()
2545 	if (!expr) {  in parse_unary()
2564 	expr->flags |= operand1->flags &  in parse_unary()
2566 	expr->fn_num = HIST_FIELD_FN_UMINUS;  in parse_unary()
2567 	expr->operands[0] = operand1;  in parse_unary()
2568 	expr->size = operand1->size;  in parse_unary()
2569 	expr->is_signed = operand1->is_signed;  in parse_unary()
2570 	expr->operator = FIELD_OP_UNARY_MINUS;  in parse_unary()
2571 	expr->name = expr_str(expr, 0);  in parse_unary()
2572 	expr->type = kstrdup_const(operand1->type, GFP_KERNEL);  in parse_unary()
2573 	if (!expr->type) {  in parse_unary()
2578 	return expr;  in parse_unary()
2580 	destroy_hist_field(expr, 0);  in parse_unary()
2633 	struct hist_field *operand1 = NULL, *operand2 = NULL, *expr = NULL;  in parse_expr()  local
2731 	expr = create_hist_field(hist_data, NULL, flags, var_name);  in parse_expr()
2732 	if (!expr) {  in parse_expr()
2741 	expr->operands[0] = operand1;  in parse_expr()
2742 	expr->operands[1] = operand2;  in parse_expr()
2762 	expr->fn_num = op_fn;  in parse_expr()
2766 			expr->operands[0] = var1;  in parse_expr()
2768 			expr->operands[1] = var2;  in parse_expr()
2770 		expr->constant = hist_fn_call(expr, NULL, NULL, NULL, NULL);  in parse_expr()
2771 		expr->fn_num = HIST_FIELD_FN_CONST;  in parse_expr()
2773 		expr->operands[0] = NULL;  in parse_expr()
2774 		expr->operands[1] = NULL;  in parse_expr()
2783 		expr->name = expr_str(expr, 0);  in parse_expr()
2786 		expr->size = operand1->size;  in parse_expr()
2787 		expr->is_signed = operand1->is_signed;  in parse_expr()
2789 		expr->operator = field_op;  in parse_expr()
2790 		expr->type = kstrdup_const(operand1->type, GFP_KERNEL);  in parse_expr()
2791 		if (!expr->type) {  in parse_expr()
2796 		expr->name = expr_str(expr, 0);  in parse_expr()
2799 	return expr;  in parse_expr()
2808 	destroy_hist_field(expr, 0);  in parse_expr()
4509 		char *expr = hist_data->attrs->var_defs.expr[i];  in create_var_fields()  local
4511 		ret = create_var_field(hist_data, j++, file, var_name, expr);  in create_var_fields()
4525 		kfree(hist_data->attrs->var_defs.expr[i]);  in free_var_defs()
4573 			hist_data->attrs->var_defs.expr[n_vars++] = s;  in parse_var_defs()