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[GFS2] Add a comment in ops_export.c

Ass a comment explaining the slightly odd construct used to
pass error values back.

Cc: Jan Engelhardt <jengelh@linux01.gwdg.de>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Steven Whitehouse 19 rokov pred
rodič
commit
7b62536141
1 zmenil súbory, kde vykonal 4 pridanie a 0 odobranie
  1. 4 0
      fs/gfs2/ops_export.c

+ 4 - 0
fs/gfs2/ops_export.c

@@ -182,6 +182,10 @@ static struct dentry *gfs2_get_parent(struct dentry *child)
 
 	if (!inode)
 		return ERR_PTR(-ENOENT);
+	/*
+	 * In case of an error, @inode carries the error value, and we
+	 * have to return that as a(n invalid) pointer to dentry.
+	 */
 	if (IS_ERR(inode))
 		return ERR_PTR(PTR_ERR(inode));