xfs: Nuke XFS_ERROR macro

XFS_ERROR was designed long ago to trap return values, but it's not
runtime configurable, it's not consistently used, and we can do
similar error trapping with ftrace scripts and triggers from
userspace.

Just nuke XFS_ERROR and associated bits.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

diff --git a/fs/xfs/xfs_attr_leaf.c b/fs/xfs/xfs_attr_leaf.c
index d2ce401..127d96a 100644
--- a/fs/xfs/xfs_attr_leaf.c
+++ b/fs/xfs/xfs_attr_leaf.c
@@ -547,7 +547,7 @@
 		break;
 	}
 	if (i == end)
-		return XFS_ERROR(ENOATTR);
+		return ENOATTR;
 
 	/*
 	 * Fix up the attribute fork data, covering the hole
@@ -611,9 +611,9 @@
 			continue;
 		if (!xfs_attr_namesp_match(args->flags, sfe->flags))
 			continue;
-		return XFS_ERROR(EEXIST);
+		return EEXIST;
 	}
-	return XFS_ERROR(ENOATTR);
+	return ENOATTR;
 }
 
 /*
@@ -640,18 +640,18 @@
 			continue;
 		if (args->flags & ATTR_KERNOVAL) {
 			args->valuelen = sfe->valuelen;
-			return XFS_ERROR(EEXIST);
+			return EEXIST;
 		}
 		if (args->valuelen < sfe->valuelen) {
 			args->valuelen = sfe->valuelen;
-			return XFS_ERROR(ERANGE);
+			return ERANGE;
 		}
 		args->valuelen = sfe->valuelen;
 		memcpy(args->value, &sfe->nameval[args->namelen],
 						    args->valuelen);
-		return XFS_ERROR(EEXIST);
+		return EEXIST;
 	}
-	return XFS_ERROR(ENOATTR);
+	return ENOATTR;
 }
 
 /*
@@ -1108,7 +1108,7 @@
 	 * no good and we should just give up.
 	 */
 	if (!ichdr.holes && sum < entsize)
-		return XFS_ERROR(ENOSPC);
+		return ENOSPC;
 
 	/*
 	 * Compact the entries to coalesce free space.
@@ -2123,7 +2123,7 @@
 	}
 	if (probe == ichdr.count || be32_to_cpu(entry->hashval) != hashval) {
 		args->index = probe;
-		return XFS_ERROR(ENOATTR);
+		return ENOATTR;
 	}
 
 	/*
@@ -2152,7 +2152,7 @@
 			if (!xfs_attr_namesp_match(args->flags, entry->flags))
 				continue;
 			args->index = probe;
-			return XFS_ERROR(EEXIST);
+			return EEXIST;
 		} else {
 			name_rmt = xfs_attr3_leaf_name_remote(leaf, probe);
 			if (name_rmt->namelen != args->namelen)
@@ -2168,11 +2168,11 @@
 			args->rmtblkcnt = xfs_attr3_rmt_blocks(
 							args->dp->i_mount,
 							args->rmtvaluelen);
-			return XFS_ERROR(EEXIST);
+			return EEXIST;
 		}
 	}
 	args->index = probe;
-	return XFS_ERROR(ENOATTR);
+	return ENOATTR;
 }
 
 /*
@@ -2208,7 +2208,7 @@
 		}
 		if (args->valuelen < valuelen) {
 			args->valuelen = valuelen;
-			return XFS_ERROR(ERANGE);
+			return ERANGE;
 		}
 		args->valuelen = valuelen;
 		memcpy(args->value, &name_loc->nameval[args->namelen], valuelen);
@@ -2226,7 +2226,7 @@
 		}
 		if (args->valuelen < args->rmtvaluelen) {
 			args->valuelen = args->rmtvaluelen;
-			return XFS_ERROR(ERANGE);
+			return ERANGE;
 		}
 		args->valuelen = args->rmtvaluelen;
 	}