config/kernel-bdi-setup-and-register.m4

   1 dnl #
   2 dnl # 2.6.34 API change
   3 dnl # The bdi_setup_and_register() helper function is avilable and
   4 dnl # exported by the kernel.  This is a trivial helper function but
   5 dnl # using it significantly simplifies the code surrounding setting
   6 dnl # up and tearing down the bdi structure.
   7 dnl #
   8 AC_DEFUN([ZFS_AC_KERNEL_BDI_SETUP_AND_REGISTER], [
   9         ZFS_CHECK_SYMBOL_EXPORT(
  10                 [bdi_setup_and_register],
  11                 [mm/backing-dev.c],
  12                 [AC_DEFINE(HAVE_BDI_SETUP_AND_REGISTER, 1,
  13                 [bdi_setup_and_register() is available])],
  14                 [])
  15 ])