check_wait_for_common.c

   1 /*
   2  * smatch/check_wait_for_common.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_wait_for_common(const char *fn, struct expression *expr, void *unused)
  15 {
  16         char *name;
  17
  18         if (!expr_unsigned(expr->left))
  19                 return;
  20         name = expr_to_str(expr->left);
  21         sm_msg("error: '%s()' returns negative and '%s' is unsigned", fn, name);
  22         free_string(name);
  23 }
  24
  25 void check_wait_for_common(int id)
  26 {
  27         my_id = id;
  28
  29         if (option_project != PROJ_KERNEL)
  30                 return;
  31         add_function_assign_hook("wait_for_common", &match_wait_for_common, NULL);
  32         add_function_assign_hook("wait_for_completion_interruptible_timeout", &match_wait_for_common, NULL);
  33 }