linux-kernel - [PATCH v3 03/10] ftrace: Remove the now superfluous sentinel elements from ctl

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Message-Id: <20240328-jag-sysctl_remove_empty_elem_kernel-v3-3-285d273912fe@samsung.com>
Date: Thu, 28 Mar 2024 16:44:04 +0100
From: Joel Granados via B4 Relay <devnull+j.granados.samsung.com@...nel.org>
To: Luis Chamberlain <mcgrof@...nel.org>, josh@...htriplett.org, 
 Kees Cook <keescook@...omium.org>, Eric Biederman <ebiederm@...ssion.com>, 
 Iurii Zaikin <yzaikin@...gle.com>, Steven Rostedt <rostedt@...dmis.org>, 
 Masami Hiramatsu <mhiramat@...nel.org>, Mark Rutland <mark.rutland@....com>, 
 Thomas Gleixner <tglx@...utronix.de>, John Stultz <jstultz@...gle.com>, 
 Stephen Boyd <sboyd@...nel.org>, Andy Lutomirski <luto@...capital.net>, 
 Will Drewry <wad@...omium.org>, Ingo Molnar <mingo@...hat.com>, 
 Peter Zijlstra <peterz@...radead.org>, Juri Lelli <juri.lelli@...hat.com>, 
 Vincent Guittot <vincent.guittot@...aro.org>, 
 Dietmar Eggemann <dietmar.eggemann@....com>, 
 Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>, 
 Daniel Bristot de Oliveira <bristot@...hat.com>, 
 Valentin Schneider <vschneid@...hat.com>, Petr Mladek <pmladek@...e.com>, 
 John Ogness <john.ogness@...utronix.de>, 
 Sergey Senozhatsky <senozhatsky@...omium.org>, 
 "Naveen N. Rao" <naveen.n.rao@...ux.ibm.com>, 
 Anil S Keshavamurthy <anil.s.keshavamurthy@...el.com>, 
 "David S. Miller" <davem@...emloft.net>, 
 Balbir Singh <bsingharora@...il.com>, Alexei Starovoitov <ast@...nel.org>, 
 Daniel Borkmann <daniel@...earbox.net>, 
 John Fastabend <john.fastabend@...il.com>, 
 Andrii Nakryiko <andrii@...nel.org>, 
 Martin KaFai Lau <martin.lau@...ux.dev>, Song Liu <song@...nel.org>, 
 Yonghong Song <yonghong.song@...ux.dev>, KP Singh <kpsingh@...nel.org>, 
 Stanislav Fomichev <sdf@...gle.com>, Hao Luo <haoluo@...gle.com>, 
 Jiri Olsa <jolsa@...nel.org>
Cc: linux-kernel@...r.kernel.org, kexec@...ts.infradead.org, 
 linux-fsdevel@...r.kernel.org, linux-trace-kernel@...r.kernel.org, 
 bpf@...r.kernel.org, Joel Granados <j.granados@...sung.com>
Subject: [PATCH v3 03/10] ftrace: Remove the now superfluous sentinel
 elements from ctl_table array

From: Joel Granados <j.granados@...sung.com>

This commit comes at the tail end of a greater effort to remove the
empty elements at the end of the ctl_table arrays (sentinels) which
will reduce the overall build time size of the kernel and run time
memory bloat by ~64 bytes per sentinel (further information Link :
https://lore.kernel.org/all/ZO5Yx5JFogGi%2FcBo@bombadil.infradead.org/)

Remove sentinel elements from ftrace_sysctls and user_event_sysctls

Acked-by: "Masami Hiramatsu (Google)" <mhiramat@...nel.org>
Acked-by: "Steven Rostedt (Google)" <rostedt@...dmis.org>
Signed-off-by: Joel Granados <j.granados@...sung.com>
---
 kernel/trace/ftrace.c            | 1 -
 kernel/trace/trace_events_user.c | 1 -
 2 files changed, 2 deletions(-)

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index da1710499698..6cec53aa45a6 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -8270,7 +8270,6 @@ static struct ctl_table ftrace_sysctls[] = {
 		.mode           = 0644,
 		.proc_handler   = ftrace_enable_sysctl,
 	},
-	{}
 };

 static int __init ftrace_sysctl_init(void)
diff --git a/kernel/trace/trace_events_user.c b/kernel/trace/trace_events_user.c
index 70d428c394b6..304ceed9fd7d 100644
--- a/kernel/trace/trace_events_user.c
+++ b/kernel/trace/trace_events_user.c
@@ -2833,7 +2833,6 @@ static struct ctl_table user_event_sysctls[] = {
 		.mode		= 0644,
 		.proc_handler	= set_max_user_events_sysctl,
 	},
-	{}
 };

 static int __init trace_events_user_init(void)

-- 
2.43.0