linux-kernel - [PATCH 01/21] ntp: Remove unused tick

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20240911-devel-anna-maria-b4-timers-ptp-ntp-v1-1-2d52f4e13476@linutronix.de>
Date: Wed, 11 Sep 2024 15:17:37 +0200
From: Anna-Maria Behnsen <anna-maria@...utronix.de>
To: John Stultz <jstultz@...gle.com>, 
 Frederic Weisbecker <frederic@...nel.org>, 
 Thomas Gleixner <tglx@...utronix.de>
Cc: linux-kernel@...r.kernel.org, netdev@...r.kernel.org, 
 Miroslav Lichvar <mlichvar@...hat.com>, 
 Richard Cochran <richardcochran@...il.com>, 
 Christopher S Hall <christopher.s.hall@...el.com>, 
 Anna-Maria Behnsen <anna-maria@...utronix.de>
Subject: [PATCH 01/21] ntp: Remove unused tick_nsec

From: Thomas Gleixner <tglx@...utronix.de>

tick_nsec is only updated in the NTP core, but there are no users.

Remove it.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Anna-Maria Behnsen <anna-maria@...utronix.de>
---
 arch/x86/include/asm/timer.h | 2 --
 include/linux/timex.h        | 1 -
 kernel/time/ntp.c            | 8 ++------
 3 files changed, 2 insertions(+), 9 deletions(-)

diff --git a/arch/x86/include/asm/timer.h b/arch/x86/include/asm/timer.h
index 7365dd4acffb..23baf8c9b34c 100644
--- a/arch/x86/include/asm/timer.h
+++ b/arch/x86/include/asm/timer.h
@@ -6,8 +6,6 @@
 #include <linux/interrupt.h>
 #include <linux/math64.h>
 
-#define TICK_SIZE (tick_nsec / 1000)
-
 unsigned long long native_sched_clock(void);
 extern void recalibrate_cpu_khz(void);
 
diff --git a/include/linux/timex.h b/include/linux/timex.h
index 3871b06bd302..7f7a12fd8200 100644
--- a/include/linux/timex.h
+++ b/include/linux/timex.h
@@ -145,7 +145,6 @@ unsigned long random_get_entropy_fallback(void);
  * estimated error = NTP dispersion.
  */
 extern unsigned long tick_usec;		/* USER_HZ period (usec) */
-extern unsigned long tick_nsec;		/* SHIFTED_HZ period (nsec) */
 
 /* Required to safely shift negative values */
 #define shift_right(x, s) ({	\
diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c
index 8d2dd214ec68..0dba1179d81d 100644
--- a/kernel/time/ntp.c
+++ b/kernel/time/ntp.c
@@ -33,9 +33,6 @@
 /* USER_HZ period (usecs): */
 unsigned long			tick_usec = USER_TICK_USEC;
 
-/* SHIFTED_HZ period (nsecs): */
-unsigned long			tick_nsec;
-
 static u64			tick_length;
 static u64			tick_length_base;
 
@@ -253,8 +250,8 @@ static inline int ntp_synced(void)
  */
 
 /*
- * Update (tick_length, tick_length_base, tick_nsec), based
- * on (tick_usec, ntp_tick_adj, time_freq):
+ * Update tick_length and tick_length_base, based on tick_usec, ntp_tick_adj and
+ * time_freq:
  */
 static void ntp_update_frequency(void)
 {
@@ -267,7 +264,6 @@ static void ntp_update_frequency(void)
 	second_length		+= ntp_tick_adj;
 	second_length		+= time_freq;
 
-	tick_nsec		 = div_u64(second_length, HZ) >> NTP_SCALE_SHIFT;
 	new_base		 = div_u64(second_length, NTP_INTERVAL_FREQ);
 
 	/*

-- 
2.39.2