config/kernel-blkdev-reread-part.m4

   1 dnl #
   2 dnl # 4.1 API, exported blkdev_reread_part() symbol, backported to the
   3 dnl # 3.10.0 CentOS 7.x enterprise kernels.
   4 dnl #
   5 AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_REREAD_PART], [
   6         AC_MSG_CHECKING([whether blkdev_reread_part() is available])
   7         ZFS_LINUX_TRY_COMPILE([
   8                 #include <linux/fs.h>
   9         ], [
  10                 struct block_device *bdev = NULL;
  11                 int error;
  12
  13                 error = blkdev_reread_part(bdev);
  14         ], [
  15                 AC_MSG_RESULT(yes)
  16                 AC_DEFINE(HAVE_BLKDEV_REREAD_PART, 1,
  17                     [blkdev_reread_part() is available])
  18         ], [
  19                 AC_MSG_RESULT(no)
  20         ])
  21 ])