xfs: change the xfs_iext_insert / xfs_iext_remove

Change the xfs_iext_insert / xfs_iext_remove prototypes to pass more
information which will allow pushing the trace points from the callers
into those functions.  This includes folding the whichfork information
into the state variable to minimize the addition stack footprint.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alex Elder <aelder@sgi.com>
diff --git a/fs/xfs/xfs_bmap.h b/fs/xfs/xfs_bmap.h
index f1ae5a1..3e84e8e 100644
--- a/fs/xfs/xfs_bmap.h
+++ b/fs/xfs/xfs_bmap.h
@@ -146,6 +146,7 @@
 #define BMAP_RIGHT_DELAY	(1 << 5)
 #define BMAP_LEFT_VALID		(1 << 6)
 #define BMAP_RIGHT_VALID	(1 << 7)
+#define BMAP_ATTRFORK		(1 << 8)
 
 #if defined(__KERNEL__) && defined(XFS_BMAP_TRACE)
 /*