[tip: timers/core] ntp: Make tick_usec static

[tip-bot2 for Thomas Gleixner]

The following commit has been merged into the timers/core branch of tip:

Commit-ID:     66606a93849bfe3cbe9f0b801b40f60b87c54e11
Gitweb:        https://git.kernel.org/tip/66606a93849bfe3cbe9f0b801b40f60b87c54e11
Author:        Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate:    Wed, 11 Sep 2024 15:17:38 +02:00
Committer:     Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitterDate: Wed, 02 Oct 2024 16:53:38 +02:00

ntp: Make tick_usec static

There are no users of tick_usec outside of the NTP core code. Therefore
make tick_usec static.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Anna-Maria Behnsen <anna-maria@xxxxxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Acked-by: John Stultz <jstultz@xxxxxxxxxx>
Link: https://lore.kernel.org/all/20240911-devel-anna-maria-b4-timers-ptp-ntp-v1-2-2d52f4e13476@xxxxxxxxxxxxx

---
 include/linux/timex.h | 7 -------
 kernel/time/ntp.c     | 5 ++++-
 2 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/include/linux/timex.h b/include/linux/timex.h
index 7f7a12f..4ee32ef 100644
--- a/include/linux/timex.h
+++ b/include/linux/timex.h
@@ -139,13 +139,6 @@ unsigned long random_get_entropy_fallback(void);
 #define MAXSEC 2048		/* max interval between updates (s) */
 #define NTP_PHASE_LIMIT ((MAXPHASE / NSEC_PER_USEC) << 5) /* beyond max. dispersion */
 
-/*
- * kernel variables
- * Note: maximum error = NTP sync distance = dispersion + delay / 2;
- * estimated error = NTP dispersion.
- */
-extern unsigned long tick_usec;		/* USER_HZ period (usec) */
-
 /* Required to safely shift negative values */
 #define shift_right(x, s) ({	\
 	__typeof__(x) __x = (x);	\
diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c
index c17cc9d..ed15ec9 100644
--- a/kernel/time/ntp.c
+++ b/kernel/time/ntp.c
@@ -31,7 +31,7 @@
 
 
 /* USER_HZ period (usecs): */
-unsigned long			tick_usec = USER_TICK_USEC;
+static unsigned long		tick_usec = USER_TICK_USEC;
 
 static u64			tick_length;
 static u64			tick_length_base;
@@ -44,6 +44,9 @@ static u64			tick_length_base;
 
 /*
  * phase-lock loop variables
+ *
+ * Note: maximum error = NTP sync distance = dispersion + delay / 2;
+ * estimated error = NTP dispersion.
  */
 
 /*