1 /*
2 * Copyright (C) 2011 Oracle.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, see http://www.gnu.org/copyleft/gpl.txt
16 */
17
18 #include "smatch.h"
19
20 static int my_id;
21
match_wait_for_common(const char * fn,struct expression * expr,void * unused)22 static void match_wait_for_common(const char *fn, struct expression *expr, void *unused)
23 {
24 char *name;
25
26 if (!expr_unsigned(expr->left))
27 return;
28 name = expr_to_str(expr->left);
29 sm_error("'%s()' returns negative and '%s' is unsigned", fn, name);
30 free_string(name);
31 }
32
check_wait_for_common(int id)33 void check_wait_for_common(int id)
34 {
35 my_id = id;
36
37 if (option_project != PROJ_KERNEL)
38 return;
39 add_function_assign_hook("wait_for_common", &match_wait_for_common, NULL);
40 add_function_assign_hook("wait_for_completion_interruptible_timeout", &match_wait_for_common, NULL);
41 }
42