[XFS] kill xfs_igrow_start and xfs_igrow_finish

xfs_igrow_start just expands to xfs_zero_eof with two asserts that are
useless in the context of the only caller and some rather confusing
comments.

xfs_igrow_finish is just a few lines of code decorated again with useless
asserts and confusing comments.

Just kill those two and merge them into xfs_setattr.

SGI-PV: 981498
SGI-Modid: xfs-linux-melb:xfs-kern:31186a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>

fs/xfs/xfs_inode.c

@@ -1763,67 +1763,6 @@ xfs_itruncate_finish(
 	return 0;
 }
 
-
-/*
- * xfs_igrow_start
- *
- * Do the first part of growing a file: zero any data in the last
- * block that is beyond the old EOF.  We need to do this before
- * the inode is joined to the transaction to modify the i_size.
- * That way we can drop the inode lock and call into the buffer
- * cache to get the buffer mapping the EOF.
- */
-int
-xfs_igrow_start(
-	xfs_inode_t	*ip,
-	xfs_fsize_t	new_size,
-	cred_t		*credp)
-{
-	ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_IOLOCK_EXCL));
-	ASSERT(new_size > ip->i_size);
-
-	/*
-	 * Zero any pages that may have been created by
-	 * xfs_write_file() beyond the end of the file
-	 * and any blocks between the old and new file sizes.
-	 */
-	return xfs_zero_eof(ip, new_size, ip->i_size);
-}
-
-/*
- * xfs_igrow_finish
- *
- * This routine is called to extend the size of a file.
- * The inode must have both the iolock and the ilock locked
- * for update and it must be a part of the current transaction.
- * The xfs_igrow_start() function must have been called previously.
- * If the change_flag is not zero, the inode change timestamp will
- * be updated.
- */
-void
-xfs_igrow_finish(
-	xfs_trans_t	*tp,
-	xfs_inode_t	*ip,
-	xfs_fsize_t	new_size,
-	int		change_flag)
-{
-	ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_IOLOCK_EXCL));
-	ASSERT(ip->i_transp == tp);
-	ASSERT(new_size > ip->i_size);
-
-	/*
-	 * Update the file size.  Update the inode change timestamp
-	 * if change_flag set.
-	 */
-	ip->i_d.di_size = new_size;
-	ip->i_size = new_size;
-	if (change_flag)
-		xfs_ichgtime(ip, XFS_ICHGTIME_CHG);
-	xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
-
-}
-
-
 /*
  * This is called when the inode's link count goes to 0.
  * We place the on-disk inode on a list in the AGI.  It

fs/xfs/xfs_inode.h

@@ -507,9 +507,6 @@ int		xfs_itruncate_start(xfs_inode_t *, uint, xfs_fsize_t);
 int		xfs_itruncate_finish(struct xfs_trans **, xfs_inode_t *,
 				     xfs_fsize_t, int, int);
 int		xfs_iunlink(struct xfs_trans *, xfs_inode_t *);
-int		xfs_igrow_start(xfs_inode_t *, xfs_fsize_t, struct cred *);
-void		xfs_igrow_finish(struct xfs_trans *, xfs_inode_t *,
-				 xfs_fsize_t, int);
 
 void		xfs_idestroy_fork(xfs_inode_t *, int);
 void		xfs_idestroy(xfs_inode_t *);

fs/xfs/xfs_vnodeops.c

@@ -444,7 +444,13 @@ xfs_setattr(
 		code = 0;
 		if ((vap->va_size > ip->i_size) &&
 		    (flags & ATTR_NOSIZETOK) == 0) {
-			code = xfs_igrow_start(ip, vap->va_size, credp);
+			/*
+			 * Do the first part of growing a file: zero any data
+			 * in the last block that is beyond the old EOF.  We
+			 * need to do this before the inode is joined to the
+			 * transaction to modify the i_size.
+			 */
+			code = xfs_zero_eof(ip, vap->va_size, ip->i_size);
 		}
 		xfs_iunlock(ip, XFS_ILOCK_EXCL);
 
@@ -512,8 +518,11 @@ xfs_setattr(
 			timeflags |= XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG;
 
 		if (vap->va_size > ip->i_size) {
-			xfs_igrow_finish(tp, ip, vap->va_size,
-			    !(flags & ATTR_DMI));
+			ip->i_d.di_size = vap->va_size;
+			ip->i_size = vap->va_size;
+			if (!(flags & ATTR_DMI))
+				xfs_ichgtime(ip, XFS_ICHGTIME_CHG);
+			xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
 		} else if ((vap->va_size <= ip->i_size) ||
 			   ((vap->va_size == 0) && ip->i_d.di_nextents)) {
 			/*