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