check_bogus_irqrestore.c

   1 /*
   2  * sparse/check_bogus_irqrestore.c
   3  *
   4  * Copyright (C) 2011 Oracle.
   5  *
   6  * Licensed under the Open Software License version 1.1
   7  *
   8  */
   9
  10 #include "smatch.h"
  11
  12 static int my_id;
  13
  14 static void match_irqrestore(const char *fn, struct expression *expr, void *data)
  15 {
  16         struct expression *arg_expr;
  17         sval_t tmp;
  18
  19         arg_expr = get_argument_from_call_expr(expr->args, 1);
  20         if (!get_implied_value(arg_expr, &tmp))
  21                 return;
  22         sm_msg("error: calling '%s()' with bogus flags", fn);
  23 }
  24
  25 void check_bogus_irqrestore(int id)
  26 {
  27         if (option_project != PROJ_KERNEL)
  28                 return;
  29
  30         my_id = id;
  31         add_function_hook("spin_unlock_irqrestore", &match_irqrestore, NULL);
  32 }