From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EFA24335BCE; Mon, 18 Aug 2025 13:55:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755525311; cv=none; b=dbwQOVd+r14bbhoB8k7zRkkzkGijg7yMNYADyFS2soiTu5LezQXUEk6vCeNgvX8WWsuGBuQC0nvGph7Lm0VaHLntEKWsTHgqUmkTPx9eNoeyIagd0Qt2z66oC44i0YtN9hQdFqxds/zYFnw/dV356ZexA993JP4Trh+XRqNBfQU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755525311; c=relaxed/simple; bh=q0bTLkVPjtXQrBlcJ17odCev1FbnQMo8spvEjViagPo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=r2C/42PuyhPgLvL5OmahPG0KslBhaWndiOSvHi0+Rz0OaLbzYgH9ls9NaRy5SyWN7uHe+suwnS+HnPG52V/gmyBEaz9pyDp37tZCr9mk7NKtzWvPjdV3BXZmVq9Eo4JKQKMH+3YEG1GUa2LTyfWp0jfuKcAD6ss+Q/hJnEgFFgw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Ox1koUlG; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Ox1koUlG" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 77A79C4CEEB; Mon, 18 Aug 2025 13:55:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1755525310; bh=q0bTLkVPjtXQrBlcJ17odCev1FbnQMo8spvEjViagPo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ox1koUlGHOC01xT2eLnaNsSFv7cAAJ7rCz0MzZDL9DOy5ZrihbdYJdcXqC5owi9xT x26CAB8WA0xAkLEgg+bQUuUGvSi1QVCEgBaIPHL+CB8JAAfyHNVV27tvl+iw1ZS9kP mdR6lGJwXSzZ30nJ5mgt0yl61F/di20V6eZzydVo= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Sven Schnelle , Heiko Carstens , Alexander Gordeev , Sasha Levin Subject: [PATCH 6.16 223/570] s390/time: Use monotonic clock in get_cycles() Date: Mon, 18 Aug 2025 14:43:30 +0200 Message-ID: <20250818124514.403158799@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250818124505.781598737@linuxfoundation.org> References: <20250818124505.781598737@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.16-stable review patch. If anyone has any objections, please let me know. ------------------ From: Sven Schnelle [ Upstream commit 09e7e29d2b49ba84bcefb3dc1657726d2de5bb24 ] Otherwise the code might not work correctly when the clock is changed. Signed-off-by: Sven Schnelle Reviewed-by: Heiko Carstens Signed-off-by: Alexander Gordeev Signed-off-by: Sasha Levin --- arch/s390/include/asm/timex.h | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) diff --git a/arch/s390/include/asm/timex.h b/arch/s390/include/asm/timex.h index bed8d0b5a282..59dfb8780f62 100644 --- a/arch/s390/include/asm/timex.h +++ b/arch/s390/include/asm/timex.h @@ -196,13 +196,6 @@ static inline unsigned long get_tod_clock_fast(void) asm volatile("stckf %0" : "=Q" (clk) : : "cc"); return clk; } - -static inline cycles_t get_cycles(void) -{ - return (cycles_t) get_tod_clock() >> 2; -} -#define get_cycles get_cycles - int get_phys_clock(unsigned long *clock); void init_cpu_timer(void); @@ -230,6 +223,12 @@ static inline unsigned long get_tod_clock_monotonic(void) return tod; } +static inline cycles_t get_cycles(void) +{ + return (cycles_t)get_tod_clock_monotonic() >> 2; +} +#define get_cycles get_cycles + /** * tod_to_ns - convert a TOD format value to nanoseconds * @todval: to be converted TOD format value -- 2.39.5