AC_DEFUN([ZFS_AC_KERNEL_BDEV_PHYSICAL_BLOCK_SIZE], [
AC_MSG_CHECKING([whether bdev_physical_block_size() is available])
tmp_flags="$EXTRA_KCFLAGS"
AC_DEFUN([ZFS_AC_KERNEL_BDEV_PHYSICAL_BLOCK_SIZE], [
AC_MSG_CHECKING([whether bdev_physical_block_size() is available])
tmp_flags="$EXTRA_KCFLAGS"