xfs: move the xfs_attr_sf_lookup tracepoint

trace_xfs_attr_sf_lookup is currently only called by
xfs_attr_shortform_lookup, which despit it's name is a simple helper for
xfs_attr_shortform_addname, which has it's own tracing.  Move the
callsite to xfs_attr_shortform_getvalue, which is the closest thing to
a high level lookup we have for the Linux xattr API.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>

Author: Christoph Hellwig

fs/xfs/libxfs/xfs_attr_leaf.c

@@ -876,8 +876,6 @@ xfs_attr_shortform_lookup(
 	struct xfs_attr_sf_entry	*sfe;
 	int				i;
 
-	trace_xfs_attr_sf_lookup(args);
-
 	ASSERT(ifp->if_format == XFS_DINODE_FMT_LOCAL);
 	sfe = &sf->list[0];
 	for (i = 0; i < sf->hdr.count;
@@ -905,6 +903,9 @@ xfs_attr_shortform_getvalue(
 	int				i;
 
 	ASSERT(args->dp->i_af.if_format == XFS_DINODE_FMT_LOCAL);
+
+	trace_xfs_attr_sf_lookup(args);
+
 	sfe = &sf->list[0];
 	for (i = 0; i < sf->hdr.count;
 				sfe = xfs_attr_sf_nextentry(sfe), i++) {