[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>

3 files changed, 12 insertions, 67 deletions

diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 4b21490334b1..199a36ac8e2d 100644
--- a/fs/xfs/xfs_inode.c
+++ b/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
diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h
index 0a999fee4f03..17a04b6321ed 100644
--- a/fs/xfs/xfs_inode.h
+++ b/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 *);
diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index e475e3717eb3..9b8b87fcd4ec 100644
--- a/fs/xfs/xfs_vnodeops.c
+++ b/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)) {
                         /*