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 8391832A3FA; Mon, 18 Aug 2025 13:25:57 +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=1755523557; cv=none; b=RQACU8C/wWQjQ6O2qo7kXgWOPGpSh653nTUpq6SDIhL7EG8NxtUdkx7GzXIDk5UnNG9Pz0337q5Fo5KitUYjOeymlKECChGG4dxItZ95AXg8nzLVXEpp6oT2o1U5oMtZ+gArO9Vks5RZ+LF7GXwdaDZ5ETPFcTpVboSJOyxld+Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755523557; c=relaxed/simple; bh=WmPOM6Bn9HYhpLuUdfvNEw8Q215xf2u7IcNkTwlkZxI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=YhX/N2nEZ7ZpUmpOkxwiC4d5GOqamf3WbD0IimAmEGAlI8jM4UyMUR8L+4rbu9VjN2m/afuHCyEnBQJaj5QpRSPVcmhTMOpo7I21cLpMuLl8OB3ZkGX7mNiYkuvY9F+b23ZJ7R/LIVlGTDjiQPnz36UnfGWjA0C5FBfusjtmuOk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=nR5UgN+0; 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="nR5UgN+0" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 97707C4CEEB; Mon, 18 Aug 2025 13:25:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1755523557; bh=WmPOM6Bn9HYhpLuUdfvNEw8Q215xf2u7IcNkTwlkZxI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nR5UgN+0LZOEysL1vFBV3D8lP9xUWsLlPvxdpzsFC2L6iWYOHcGB4sWLT2Vb87JWT IRZA995S/RU6nGbfPwpQFFKMzPjJhfpdDu3ZoHrTubLH5VUijTMX7QKFbeCUmfNVah c/R9SCTlEumxNJUHK+BtJtFVM+pY9OTFO6DGX5oU= 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 6.15 207/515] s390/time: Use monotonic clock in get_cycles() Date: Mon, 18 Aug 2025 14:43:13 +0200 Message-ID: <20250818124506.334166182@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250818124458.334548733@linuxfoundation.org> References: <20250818124458.334548733@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 6.15-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