check_bogus_irqrestore.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_irqrestore(const char *fn, struct expression *expr, void *_arg_nr)
  23 {
  24         int arg_nr = PTR_INT(_arg_nr);
  25         struct expression *arg_expr;
  26         sval_t tmp;
  27
  28         arg_expr = get_argument_from_call_expr(expr->args, arg_nr);
  29         if (!get_implied_value(arg_expr, &tmp))
  30                 return;
  31         sm_error("calling '%s()' with bogus flags", fn);
  32 }
  33
  34 void check_bogus_irqrestore(int id)
  35 {
  36         if (option_project != PROJ_KERNEL)
  37                 return;
  38
  39         my_id = id;
  40         add_function_hook("spin_unlock_irqrestore", &match_irqrestore, INT_PTR(1));
  41 }