linux-kernel - [tip: timers/core] timekeeping: Define a struct type for tk

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Message-ID: <172986803467.1442.8648601627993749977.tip-bot2@tip-bot2>
Date: Fri, 25 Oct 2024 14:53:54 -0000
From: "tip-bot2 for Anna-Maria Behnsen" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: "Anna-Maria Behnsen" <anna-maria@...utronix.de>,
 Thomas Gleixner <tglx@...utronix.de>, John Stultz <jstultz@...gle.com>,
 x86@...nel.org, linux-kernel@...r.kernel.org
Subject: [tip: timers/core] timekeeping: Define a struct type for tk_core to
 make it reusable

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

Commit-ID:     206db8b13619beedf8a3660abf02c2eb543853d4
Gitweb:        https://git.kernel.org/tip/206db8b13619beedf8a3660abf02c2eb543853d4
Author:        Anna-Maria Behnsen <anna-maria@...utronix.de>
AuthorDate:    Wed, 09 Oct 2024 10:29:03 +02:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Fri, 25 Oct 2024 16:41:12 +02:00

timekeeping: Define a struct type for tk_core to make it reusable

The struct tk_core uses is not reusable. As long as there is only a single
timekeeper, this is not a problem. But when the timekeeper infrastructure
will be reused for per ptp clock timekeepers, an explicit struct type is
required.

Define struct tk_data as explicit struct type for tk_core.

Signed-off-by: Anna-Maria Behnsen <anna-maria@...utronix.de>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Acked-by: John Stultz <jstultz@...gle.com>
Link: https://lore.kernel.org/all/20241009-devel-anna-maria-b4-timers-ptp-timekeeping-v2-10-554456a44a15@linutronix.de

---
 kernel/time/timekeeping.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 5392a66..d520c11 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -45,12 +45,14 @@ enum timekeeping_adv_mode {
  * The most important data for readout fits into a single 64 byte
  * cache line.
  */
-static struct {
+struct tk_data {
 	seqcount_raw_spinlock_t	seq;
 	struct timekeeper	timekeeper;
 	struct timekeeper	shadow_timekeeper;
 	raw_spinlock_t		lock;
-} tk_core ____cacheline_aligned;
+} ____cacheline_aligned;
+
+static struct tk_data tk_core;
 
 /* flag for if timekeeping is suspended */
 int __read_mostly timekeeping_suspended;