xfs: deprecate BMV_IF_NO_DMAPI_READ flag

Use of the flag has had no effect since kernel commit 288699fe
("xfs: drop dmapi hooks"), which removed all dmapi related code, so
deprecate it.
Signed-off-by: Anthony Iliopoulos <ailiop@suse.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>

fs/xfs/libxfs/xfs_fs.h

@@ -65,7 +65,7 @@ struct getbmapx {
 
 /*	bmv_iflags values - set by XFS_IOC_GETBMAPX caller.	*/
 #define BMV_IF_ATTRFORK		0x1	/* return attr fork rather than data */
-#define BMV_IF_NO_DMAPI_READ	0x2	/* Do not generate DMAPI read event  */
+#define BMV_IF_NO_DMAPI_READ	0x2	/* Deprecated */
 #define BMV_IF_PREALLOC		0x4	/* rtn status BMV_OF_PREALLOC if req */
 #define BMV_IF_DELALLOC		0x8	/* rtn status BMV_OF_DELALLOC if req */
 #define BMV_IF_NO_HOLES		0x10	/* Do not return holes */

fs/xfs/xfs_ioctl.c

@@ -1672,8 +1672,6 @@ xfs_ioc_getbmap(
 		bmx.bmv_iflags = BMV_IF_ATTRFORK;
 		/*FALLTHRU*/
 	case XFS_IOC_GETBMAP:
-		if (file->f_mode & FMODE_NOCMTIME)
-			bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
 		/* struct getbmap is a strict subset of struct getbmapx. */
 		recsize = sizeof(struct getbmap);
 		break;