config/kernel-follow-down-one.m4

   1 dnl #
   2 dnl # 2.6.38 API change
   3 dnl # follow_down() renamed follow_down_one().  The original follow_down()
   4 dnl # symbol still exists but will traverse down all the layers.
   5 dnl #
   6 AC_DEFUN([ZFS_AC_KERNEL_FOLLOW_DOWN_ONE], [
   7         AC_MSG_CHECKING([whether follow_down_one() is available])
   8         ZFS_LINUX_TRY_COMPILE([
   9                 #include <linux/namei.h>
  10         ],[
  11                 struct path *p = NULL;
  12                 follow_down_one(p);
  13         ],[
  14                 AC_MSG_RESULT(yes)
  15                 AC_DEFINE(HAVE_FOLLOW_DOWN_ONE, 1,
  16                     [follow_down_one() is available])
  17         ],[
  18                 AC_MSG_RESULT(no)
  19         ])
  20 ])