xfs: don't implement XFS_IOC_RESVSP / XFS_IOC_RESVSP64

These ioctls are implemented by the VFS and mapped to ->fallocate now,
so this code won't ever be reached.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Reviewed-by: NDarrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: NDarrick J. Wong <darrick.wong@oracle.com>

fs/xfs/xfs_ioctl.c

@@ -643,8 +643,6 @@ xfs_ioc_space(
 	 */
 	switch (cmd) {
 	case XFS_IOC_ZERO_RANGE:
-	case XFS_IOC_RESVSP:
-	case XFS_IOC_RESVSP64:
 	case XFS_IOC_UNRESVSP:
 	case XFS_IOC_UNRESVSP64:
 		if (bf->l_len <= 0) {
@@ -670,12 +668,6 @@ xfs_ioc_space(
 		flags |= XFS_PREALLOC_SET;
 		error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
 		break;
-	case XFS_IOC_RESVSP:
-	case XFS_IOC_RESVSP64:
-		flags |= XFS_PREALLOC_SET;
-		error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
-						XFS_BMAPI_PREALLOC);
-		break;
 	case XFS_IOC_UNRESVSP:
 	case XFS_IOC_UNRESVSP64:
 		error = xfs_free_file_space(ip, bf->l_start, bf->l_len);
@@ -2121,11 +2113,9 @@ xfs_file_ioctl(
 		return xfs_ioc_setlabel(filp, mp, arg);
 	case XFS_IOC_ALLOCSP:
 	case XFS_IOC_FREESP:
-	case XFS_IOC_RESVSP:
 	case XFS_IOC_UNRESVSP:
 	case XFS_IOC_ALLOCSP64:
 	case XFS_IOC_FREESP64:
-	case XFS_IOC_RESVSP64:
 	case XFS_IOC_UNRESVSP64:
 	case XFS_IOC_ZERO_RANGE: {
 		xfs_flock64_t		bf;

fs/xfs/xfs_ioctl32.c

@@ -558,8 +558,6 @@ xfs_file_compat_ioctl(
 	case XFS_IOC_FREESP_32:
 	case XFS_IOC_ALLOCSP64_32:
 	case XFS_IOC_FREESP64_32:
-	case XFS_IOC_RESVSP_32:
-	case XFS_IOC_UNRESVSP_32:
 	case XFS_IOC_RESVSP64_32:
 	case XFS_IOC_UNRESVSP64_32:
 	case XFS_IOC_ZERO_RANGE_32: {