From: Thomas Gleixner <tglx@linutronix.de>
Date: Mon, 19 May 2025 08:33:26 +0000 (+0200)
Subject: timekeeping: Prepare timekeeping_update_from_shadow()
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=8c782acd3f47e21f9b03fd3720172d1f8e4fb796;p=users%2Fjedix%2Flinux-maple.git

timekeeping: Prepare timekeeping_update_from_shadow()

Don't invoke the VDSO and paravirt updates when utilized for auxiliary
clocks. This is a temporary workaround until the VDSO and paravirt
interfaces have been worked out.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250519083026.223876435@linutronix.de
---

diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 153f760dffb4..e3c1a1c1d8c5 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -683,13 +683,15 @@ static void timekeeping_update_from_shadow(struct tk_data *tkd, unsigned int act
 
 	tk_update_leap_state(tk);
 	tk_update_ktime_data(tk);
+	tk->tkr_mono.base_real = tk->tkr_mono.base + tk->offs_real;
 
-	update_vsyscall(tk);
-	update_pvclock_gtod(tk, action & TK_CLOCK_WAS_SET);
+	if (tk->id == TIMEKEEPER_CORE) {
+		update_vsyscall(tk);
+		update_pvclock_gtod(tk, action & TK_CLOCK_WAS_SET);
 
-	tk->tkr_mono.base_real = tk->tkr_mono.base + tk->offs_real;
-	update_fast_timekeeper(&tk->tkr_mono, &tk_fast_mono);
-	update_fast_timekeeper(&tk->tkr_raw,  &tk_fast_raw);
+		update_fast_timekeeper(&tk->tkr_mono, &tk_fast_mono);
+		update_fast_timekeeper(&tk->tkr_raw,  &tk_fast_raw);
+	}
 
 	if (action & TK_CLOCK_WAS_SET)
 		tk->clock_was_set_seq++;