xfs: avoid setting XFS_ILOG_CORE if i_version doesn't need incrementing

	/*

	 * First time we log the inode in a transaction, bump the inode change

	 * counter if it is configured for this to occur. We don't use

	 * inode_inc_version() because there is no need for extra locking around

	 * i_version as we already hold the inode locked exclusively for

	 * metadata modification.

	 * counter if it is configured for this to occur. While we have the

	 * inode locked exclusively for metadata modification, we can usually

	 * avoid setting XFS_ILOG_CORE if no one has queried the value since

	 * the last time it was incremented. If we have XFS_ILOG_CORE already

	 * set however, then go ahead and bump the i_version counter

	 * unconditionally.

	 */

	if (!(ip->i_itemp->ili_item.li_desc->lid_flags & XFS_LID_DIRTY) &&

	    IS_I_VERSION(VFS_I(ip))) {

		inode_inc_iversion(VFS_I(ip));

		if (inode_maybe_inc_iversion(VFS_I(ip), flags & XFS_ILOG_CORE))

			flags |= XFS_ILOG_CORE;

	}