ftrace: Remove failures file

The failures file in the debugfs tracing directory would list the
functions that failed to convert when the old dead ftrace daemon
tried to update code but failed. Since this code is now dead along
with the daemon the failures file is useless. Remove it.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

kernel/trace/ftrace.c

@@ -1355,9 +1355,8 @@ static int __init ftrace_dyn_table_alloc(unsigned long num_to_init)
 enum {
 	FTRACE_ITER_FILTER	= (1 << 0),
 	FTRACE_ITER_NOTRACE	= (1 << 1),
-	FTRACE_ITER_FAILURES	= (1 << 2),
-	FTRACE_ITER_PRINTALL	= (1 << 3),
-	FTRACE_ITER_HASH	= (1 << 4),
+	FTRACE_ITER_PRINTALL	= (1 << 2),
+	FTRACE_ITER_HASH	= (1 << 3),
 };
 
 #define FTRACE_BUFF_MAX (KSYM_SYMBOL_LEN+4) /* room for wildcards */
@@ -1487,12 +1486,6 @@ t_next(struct seq_file *m, void *v, loff_t *pos)
 		rec = &iter->pg->records[iter->idx++];
 		if ((rec->flags & FTRACE_FL_FREE) ||
 
-		    (!(iter->flags & FTRACE_ITER_FAILURES) &&
-		     (rec->flags & FTRACE_FL_FAILED)) ||
-
-		    ((iter->flags & FTRACE_ITER_FAILURES) &&
-		     !(rec->flags & FTRACE_FL_FAILED)) ||
-
 		    ((iter->flags & FTRACE_ITER_FILTER) &&
 		     !(rec->flags & FTRACE_FL_FILTER)) ||
 
@@ -1633,24 +1626,6 @@ ftrace_avail_open(struct inode *inode, struct file *file)
 	return ret;
 }
 
-static int
-ftrace_failures_open(struct inode *inode, struct file *file)
-{
-	int ret;
-	struct seq_file *m;
-	struct ftrace_iterator *iter;
-
-	ret = ftrace_avail_open(inode, file);
-	if (!ret) {
-		m = file->private_data;
-		iter = m->private;
-		iter->flags = FTRACE_ITER_FAILURES;
-	}
-
-	return ret;
-}
-
-
 static void ftrace_filter_reset(int enable)
 {
 	struct ftrace_page *pg;
@@ -2448,13 +2423,6 @@ static const struct file_operations ftrace_avail_fops = {
 	.release = seq_release_private,
 };
 
-static const struct file_operations ftrace_failures_fops = {
-	.open = ftrace_failures_open,
-	.read = seq_read,
-	.llseek = seq_lseek,
-	.release = seq_release_private,
-};
-
 static const struct file_operations ftrace_filter_fops = {
 	.open = ftrace_filter_open,
 	.read = seq_read,
@@ -2683,9 +2651,6 @@ static __init int ftrace_init_dyn_debugfs(struct dentry *d_tracer)
 	trace_create_file("available_filter_functions", 0444,
 			d_tracer, NULL, &ftrace_avail_fops);
 
-	trace_create_file("failures", 0444,
-			d_tracer, NULL, &ftrace_failures_fops);
-
 	trace_create_file("set_ftrace_filter", 0644, d_tracer,
 			NULL, &ftrace_filter_fops);