config/kernel-blkdev-get-by-path.m4

   1 dnl #
   2 dnl # 2.6.38 API change
   3 dnl # open_bdev_exclusive() changed to blkdev_get_by_path()
   4 dnl # close_bdev_exclusive() changed to blkdev_put()
   5 dnl #
   6 AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_GET_BY_PATH],
   7         [AC_MSG_CHECKING([whether blkdev_get_by_path() is available])
   8         ZFS_LINUX_TRY_COMPILE_SYMBOL([
   9                 #include <linux/fs.h>
  10         ], [
  11                 blkdev_get_by_path(NULL, 0, NULL);
  12         ], [blkdev_get_by_path], [fs/block_dev.c], [
  13                 AC_MSG_RESULT(yes)
  14                 AC_DEFINE(HAVE_BLKDEV_GET_BY_PATH, 1,
  15                           [blkdev_get_by_path() is available])
  16         ], [
  17                 AC_MSG_RESULT(no)
  18         ])
  19 ])