config/kernel-bdev-block-device-operations.m4

   1 dnl #
   2 dnl # 2.6.x API change
   3 dnl #
   4 AC_DEFUN([ZFS_AC_KERNEL_BDEV_BLOCK_DEVICE_OPERATIONS], [
   5         AC_MSG_CHECKING([block device operation prototypes])
   6         tmp_flags="$EXTRA_KCFLAGS"
   7         EXTRA_KCFLAGS="${NO_UNUSED_BUT_SET_VARIABLE}"
   8         ZFS_LINUX_TRY_COMPILE([
   9                 #include <linux/blkdev.h>
  10
  11                 int blk_open(struct block_device *bdev, fmode_t mode)
  12                     { return 0; }
  13                 int blk_ioctl(struct block_device *bdev, fmode_t mode,
  14                     unsigned x, unsigned long y) { return 0; }
  15                 int blk_compat_ioctl(struct block_device * bdev, fmode_t mode,
  16                     unsigned x, unsigned long y) { return 0; }
  17
  18                 static const struct block_device_operations
  19                     bops __attribute__ ((unused)) = {
  20                         .open           = blk_open,
  21                         .release        = NULL,
  22                         .ioctl          = blk_ioctl,
  23                         .compat_ioctl   = blk_compat_ioctl,
  24                 };
  25         ],[
  26         ],[
  27                 AC_MSG_RESULT(struct block_device)
  28                 AC_DEFINE(HAVE_BDEV_BLOCK_DEVICE_OPERATIONS, 1,
  29                           [struct block_device_operations use bdevs])
  30         ],[
  31                 AC_MSG_RESULT(struct inode)
  32         ])
  33         EXTRA_KCFLAGS="$tmp_flags"
  34 ])