check_wait_for_common.c

   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
  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
  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 }