[PATCH v9 03/52] dyndbg: reword "class unknown," to "class:_UNKNOWN_"

[Jim Cromie <jim.cromie@gmail.com>]

When a dyndbg classname is unknown to a kernel module (as before
previous patch), the callsite is un-addressable via >control queries.

The control-file displays this condition as "class unknown,"
currently.  That spelling is sub-optimal/too-generic, so change it to
"class:_UNKNOWN_" to loudly announce the erroneous situation, and to
make it exceedingly greppable.

NB: pr_debugs are only alterable via >control, and to protect class'd
debug's from unintended alteration, "class name" must be given to
change them.  Classmaps map known classes to reserved .class_ids (the
1..64 val range per module).

Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
---
 lib/dynamic_debug.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index f2c5e7910bb1..73ccf947d4aa 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -1154,7 +1154,7 @@ static int ddebug_proc_show(struct seq_file *m, void *p)
 		if (class)
 			seq_printf(m, " class:%s", class);
 		else
-			seq_printf(m, " class unknown, _id:%d", dp->class_id);
+			seq_printf(m, " class:_UNKNOWN_ _id:%d", dp->class_id);
 	}
 	seq_puts(m, "\n");
 
-- 
2.45.2