1*1f5207b7SJohn Levon /*
2*1f5207b7SJohn Levon  * Copyright (C) 2015 Oracle.
3*1f5207b7SJohn Levon  *
4*1f5207b7SJohn Levon  * This program is free software; you can redistribute it and/or
5*1f5207b7SJohn Levon  * modify it under the terms of the GNU General Public License
6*1f5207b7SJohn Levon  * as published by the Free Software Foundation; either version 2
7*1f5207b7SJohn Levon  * of the License, or (at your option) any later version.
8*1f5207b7SJohn Levon  *
9*1f5207b7SJohn Levon  * This program is distributed in the hope that it will be useful,
10*1f5207b7SJohn Levon  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11*1f5207b7SJohn Levon  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12*1f5207b7SJohn Levon  * GNU General Public License for more details.
13*1f5207b7SJohn Levon  *
14*1f5207b7SJohn Levon  * You should have received a copy of the GNU General Public License
15*1f5207b7SJohn Levon  * along with this program; if not, see http://www.gnu.org/copyleft/gpl.txt
16*1f5207b7SJohn Levon  */
17*1f5207b7SJohn Levon 
18*1f5207b7SJohn Levon #include "smatch.h"
19*1f5207b7SJohn Levon #include "smatch_slist.h"
20*1f5207b7SJohn Levon 
21*1f5207b7SJohn Levon static int my_id;
22*1f5207b7SJohn Levon 
match_test_bit(const char * fn,struct expression * expr,void * data)23*1f5207b7SJohn Levon static void match_test_bit(const char *fn, struct expression *expr, void *data)
24*1f5207b7SJohn Levon {
25*1f5207b7SJohn Levon 	struct expression *arg;
26*1f5207b7SJohn Levon 	char *macro;
27*1f5207b7SJohn Levon 
28*1f5207b7SJohn Levon 	arg = get_argument_from_call_expr(expr->args, 0);
29*1f5207b7SJohn Levon 	arg = strip_expr(arg);
30*1f5207b7SJohn Levon 
31*1f5207b7SJohn Levon 	if (!arg || arg->type != EXPR_BINOP)
32*1f5207b7SJohn Levon 		return;
33*1f5207b7SJohn Levon 	if (arg->op != '|' && arg->op != SPECIAL_LEFTSHIFT)
34*1f5207b7SJohn Levon 		return;
35*1f5207b7SJohn Levon 	macro = get_macro_name(arg->pos);
36*1f5207b7SJohn Levon 	if (macro && strstr(macro, "cpu_has"))
37*1f5207b7SJohn Levon 		return;
38*1f5207b7SJohn Levon 	sm_warning("test_bit() takes a bit number");
39*1f5207b7SJohn Levon }
40*1f5207b7SJohn Levon 
check_test_bit(int id)41*1f5207b7SJohn Levon void check_test_bit(int id)
42*1f5207b7SJohn Levon {
43*1f5207b7SJohn Levon 	my_id = id;
44*1f5207b7SJohn Levon 
45*1f5207b7SJohn Levon 	if (option_project != PROJ_KERNEL)
46*1f5207b7SJohn Levon 		return;
47*1f5207b7SJohn Levon 
48*1f5207b7SJohn Levon 	add_function_hook("test_bit", &match_test_bit, NULL);
49*1f5207b7SJohn Levon 	add_function_hook("variable_test_bit", &match_test_bit, NULL);
50*1f5207b7SJohn Levon 	add_function_hook("set_bit", &match_test_bit, NULL);
51*1f5207b7SJohn Levon 	add_function_hook("clear_bit", &match_test_bit, NULL);
52*1f5207b7SJohn Levon 	add_function_hook("test_and_clear_bit", &match_test_bit, NULL);
53*1f5207b7SJohn Levon 	add_function_hook("test_and_set_bit", &match_test_bit, NULL);
54*1f5207b7SJohn Levon }
55