[JFFS2] Track parent inode for directories (for NFS export)

To support NFS export, we need to know the parent inode of directories.
Rather than growing the jffs2_inode_cache structure, share space with
the nlink field -- which was always set to 1 for directories anyway.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/fs/jffs2/nodelist.h b/fs/jffs2/nodelist.h
index 8219df6eb6d8..1750445556c3 100644
--- a/fs/jffs2/nodelist.h
+++ b/fs/jffs2/nodelist.h
@@ -177,7 +177,10 @@ struct jffs2_inode_cache {
 #ifdef CONFIG_JFFS2_FS_XATTR
         struct jffs2_xattr_ref *xref;
 #endif
-        int nlink;
+        uint32_t pino_nlink;    /* Directories store parent inode
+                                   here; other inodes store nlink.
+                                   Zero always means that it's
+                                   completely unlinked. */
 };
 
 /* Inode states for 'state' above. We need the 'GC' state to prevent