xfs: do not require an ioend for new EOF calculation

Replace xfs_ioend_new_eof with a new inline xfs_new_eof helper that
doesn't require and ioend, and is available also outside of xfs_aops.c.

Also make the code a bit more clear by using a normal if statement
instead of a slightly misleading MIN().

Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ben Myers <bpm@sgi.com>

2 files changed, 18 insertions, 20 deletions

diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c
index 540a01742c6d..745492b6c666 100644
--- a/fs/xfs/xfs_aops.c
+++ b/fs/xfs/xfs_aops.c
@@ -99,23 +99,6 @@ xfs_destroy_ioend(
 }
 
 /*
- * If the end of the current ioend is beyond the current EOF,
- * return the new EOF value, otherwise zero.
- */
-STATIC xfs_fsize_t
-xfs_ioend_new_eof(
-        xfs_ioend_t             *ioend)
-{
-        xfs_inode_t             *ip = XFS_I(ioend->io_inode);
-        xfs_fsize_t             isize;
-        xfs_fsize_t             bsize;
-
-        bsize = ioend->io_offset + ioend->io_size;
-        isize = MIN(i_size_read(VFS_I(ip)), bsize);
-        return isize > ip->i_d.di_size ? isize : 0;
-}
-
-/*
  * Fast and loose check if this write could update the on-disk inode size.
  */
 static inline bool xfs_ioend_is_append(struct xfs_ioend *ioend)
@@ -135,7 +118,7 @@ xfs_setfilesize(
         xfs_fsize_t             isize;
 
         xfs_ilock(ip, XFS_ILOCK_EXCL);
-        isize = xfs_ioend_new_eof(ioend);
+        isize = xfs_new_eof(ip, ioend->io_offset + ioend->io_size);
         if (isize) {
                 trace_xfs_setfilesize(ip, ioend->io_offset, ioend->io_size);
                 ip->i_d.di_size = isize;
@@ -357,6 +340,7 @@ xfs_submit_ioend_bio(
         xfs_ioend_t             *ioend,
         struct bio              *bio)
 {
+        struct xfs_inode        *ip = XFS_I(ioend->io_inode);
         atomic_inc(&ioend->io_remaining);
         bio->bi_private = ioend;
         bio->bi_end_io = xfs_end_bio;
@@ -365,8 +349,8 @@ xfs_submit_ioend_bio(
          * If the I/O is beyond EOF we mark the inode dirty immediately
          * but don't update the inode size until I/O completion.
          */
-        if (xfs_ioend_new_eof(ioend))
-                xfs_mark_inode_dirty(XFS_I(ioend->io_inode));
+        if (xfs_new_eof(ip, ioend->io_offset + ioend->io_size))
+                xfs_mark_inode_dirty(ip);
 
         submit_bio(wbc->sync_mode == WB_SYNC_ALL ? WRITE_SYNC : WRITE, bio);
 }
diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h
index eda493780395..7f90469141d7 100644
--- a/fs/xfs/xfs_inode.h
+++ b/fs/xfs/xfs_inode.h
@@ -275,6 +275,20 @@ static inline xfs_fsize_t XFS_ISIZE(struct xfs_inode *ip)
 }
 
 /*
+ * If this I/O goes past the on-disk inode size update it unless it would
+ * be past the current in-core inode size.
+ */
+static inline xfs_fsize_t
+xfs_new_eof(struct xfs_inode *ip, xfs_fsize_t new_size)
+{
+        xfs_fsize_t i_size = i_size_read(VFS_I(ip));
+
+        if (new_size > i_size)
+                new_size = i_size;
+        return new_size > ip->i_d.di_size ? new_size : 0;
+}
+
+/*
  * i_flags helper functions
  */
 static inline void