[XFS] Fix up some comments, tidy up some macros - no functional changes.

SGI Modid: 2.5.x-xfs:slinx:135917a

fs/xfs/linux/xfs_vnode.h

@@ -671,13 +671,14 @@ extern void	vn_rele(struct vnode *);
 #define VN_HOLD(vp)		((void)vn_hold(vp))
 #define VN_RELE(vp)		(iput(LINVFS_GET_IP(vp)))
 
-#endif	/* ! (defined(CONFIG_XFS_VNODE_TRACING) */
+#endif	/* ! (defined(CONFIG_XFS_VNODE_TRACING)) */
 
 /*
  * Vname handling macros.
  */
 #define VNAME(dentry)		((char *) (dentry)->d_name.name)
 #define VNAMELEN(dentry)	((dentry)->d_name.len)
+#define VNAME_TO_VNODE(dentry)	(LINVFS_GET_VP((dentry)->d_inode))
 
 /*
  * Vnode spinlock manipulation.

fs/xfs/pagebuf/page_buf.c

@@ -1108,7 +1108,7 @@ _pagebuf_wait_unpin(
  *	pagebuf_iodone
  *
  *	pagebuf_iodone marks a buffer for which I/O is in progress
- *	done with respect to that I/O.	The pb_done routine, if
+ *	done with respect to that I/O.	The pb_iodone routine, if
  *	present, will be called as a side-effect.
  */
 void
@@ -1173,7 +1173,7 @@ pagebuf_ioerror(			/* mark/clear buffer error flag */
  *	pagebuf_iostart initiates I/O on a buffer, based on the flags supplied.
  *	If necessary, it will arrange for any disk space allocation required,
  *	and it will break up the request if the block mappings require it.
- *	An pb_iodone routine in the buffer supplied will only be called
+ *	The pb_iodone routine in the buffer supplied will only be called
  *	when all of the subsidiary I/O requests, if any, have been completed.
  *	pagebuf_iostart calls the pagebuf_ioinitiate routine or
  *	pagebuf_iorequest, if the former routine is not defined, to start
@@ -1317,7 +1317,7 @@ pagebuf_iorequest(			/* start real I/O		*/
 
 	/* Set the count to 1 initially, this will stop an I/O
 	 * completion callout which happens before we have started
-	 * all the I/O from calling iodone too early
+	 * all the I/O from calling pagebuf_iodone too early.
 	 */
 	atomic_set(&pb->pb_io_remaining, 1);
 

fs/xfs/xfs_utils.c

@@ -47,9 +47,7 @@ xfs_get_dir_entry(
 	vnode_t		*vp;
 	bhv_desc_t	*bdp;
 
-	ASSERT(dentry->d_inode);
-
-	vp = LINVFS_GET_VP(dentry->d_inode);
+	vp = VNAME_TO_VNODE(dentry);
 	bdp = vn_bhv_lookup_unlocked(VN_BHV_HEAD(vp), &xfs_vnodeops);
 	if (!bdp) {
 		*ipp = NULL;