[GFS2] Shrink gfs2_inode (7) - di_payload_format

This is almost never used. Its there for backward
compatibility with GFS1. It doesn't need its own
field since it can always be calculated from the
inode mode & flags. This saves a bit more space
in the gfs2_inode.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index c22ae3c..f6177fc 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -210,7 +210,6 @@
 	di->di_generation = be64_to_cpu(str->di_generation);
 
 	di->di_flags = be32_to_cpu(str->di_flags);
-	di->di_payload_format = be32_to_cpu(str->di_payload_format);
 	di->di_height = be16_to_cpu(str->di_height);
 
 	di->di_depth = be16_to_cpu(str->di_depth);
@@ -699,7 +698,7 @@
 	}
 
 	di->__pad1 = 0;
-	di->di_payload_format = cpu_to_be32(0);
+	di->di_payload_format = cpu_to_be32(S_ISDIR(mode) ? GFS2_FORMAT_DE : 0);
 	di->di_height = cpu_to_be32(0);
 	di->__pad2 = 0;
 	di->__pad3 = 0;