linux-kernel - [RFC PATCH v6 24/34] dyndbg: dont show header records in control

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Message-Id: <20210529200029.205306-25-jim.cromie@gmail.com>
Date:   Sat, 29 May 2021 14:00:19 -0600
From:   Jim Cromie <jim.cromie@...il.com>
To:     jbaron@...mai.com, gregkh@...uxfoundation.org,
        linux-kernel@...r.kernel.org
Cc:     Jim Cromie <jim.cromie@...il.com>
Subject: [RFC PATCH v6 24/34] dyndbg: dont show header records in control

header record pairs are special in that the filename member no longer
points at string data, but back at the data structure.

Theres no reason to expose this in control file, and no reason to even
print a line for the header, since its not part of the interface.

Printing a "# header" line is a decent alternative, but separate.

Signed-off-by: Jim Cromie <jim.cromie@...il.com>
---
 lib/dynamic_debug.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index a7840584b402..9a089b8d2ccd 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -995,7 +995,9 @@ static int ddebug_proc_show(struct seq_file *m, void *p)
 
 	dc = ddebug_site_get(dp);
 
-	if (dc) {
+	if (dc && is_dyndbg_header_pair(dp, dc)) {
+		/* skip output on header */
+	} else if (dc) {
 		seq_printf(m, "%s:%u [%s]%s =%s \"",
 			   trim_prefix(dc->filename), dp->lineno,
 			   iter->table->mod_name, dc->function,
-- 
2.31.1