From patchwork Thu Oct 8 15:46:39 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnd Bergmann X-Patchwork-Id: 11823375 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 487941580 for ; Thu, 8 Oct 2020 15:48:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 30A1021897 for ; Thu, 8 Oct 2020 15:48:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728622AbgJHPsT (ORCPT ); Thu, 8 Oct 2020 11:48:19 -0400 Received: from mout.kundenserver.de ([217.72.192.75]:43905 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728323AbgJHPsP (ORCPT ); Thu, 8 Oct 2020 11:48:15 -0400 Received: from localhost.localdomain ([192.30.34.233]) by mrelayeu.kundenserver.de (mreue107 [212.227.15.145]) with ESMTPA (Nemesis) id 1MQMdz-1k4KSW1S3l-00MNpC; Thu, 08 Oct 2020 17:47:22 +0200 From: Arnd Bergmann To: linux-kernel@vger.kernel.org Cc: Arnd Bergmann , Russell King , Tony Luck , Fenghua Yu , Greg Ungerer , Geert Uytterhoeven , Finn Thain , Philip Blundell , Joshua Thompson , Sam Creasey , "James E.J. Bottomley" , Helge Deller , Thomas Gleixner , Daniel Lezcano , John Stultz , Stephen Boyd , Linus Walleij , linux-ia64@vger.kernel.org, linux-parisc@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH 01/13] timekeeping: add CONFIG_LEGACY_TIMER_TICK Date: Thu, 8 Oct 2020 17:46:39 +0200 Message-Id: <20201008154651.1901126-2-arnd@arndb.de> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20201008154651.1901126-1-arnd@arndb.de> References: <20201008154651.1901126-1-arnd@arndb.de> MIME-Version: 1.0 X-Provags-ID: V03:K1:lJJKtGZAxWt7DMFVnzZRB47PnCLatINXoORTSIFhtBK1TMTdNiv RG4yLsnkyOAV7i7CY4P6/yTTsoYlGUtq5FolW0zFQmapsMzTrePJNwmGfm6BWP+Zj/wddj3 L1sjseIS105PzF6aN9WPsUH3h0CWoHEvfIlgpVpv9Loi24x65wMHlFaPhAQ/Zd5HCND4YC8 a5Apn6ItpnEokOcusQ+YQ== X-Spam-Flag: NO X-UI-Out-Filterresults: notjunk:1;V03:K0:LRXNx4Y7rGM=:W7aq/8a9yjrM8EkUU5AZjb KRhqGA4PFyX2G6oCIIIvLpEOsxxfnokV1+U4lVGw+713pi22Z2jAYx2+OLR3eo4/G8+4vgK3p pX2TbMknPaniCvgONqCrrNhqSqsm7b4l3qnYaXNCRKbqUOty/aF753t5ZwdhlByx5YN14cPfQ QwFuNJRQRPQVIqhJS3YEXx6RVGw6fT+KxGpyZdnfjjmD16ZMQx3Mb+rN/nTQNugTsbrwc3eFW pGWl/GE0s1czW1DB4UqH6MJy5sgdQBmJU36SJx6gzyXQVNN7sDHpOMCuuGsAbpkXCbzIPPVM1 sqn1+jNvH7zxTQ3puVsYymfmUFP4QCs0LXHwH2qML7YU7sJLMMx8jOv5SkoR985WFCY8VZ37b VMIkdIP0uMWMQxhJKHI/nc3f6WdynC7AHHnrUuoX1FjeGj+U2u0ajNtUFIJtQLIDuSMg0IXma KYyj9fO3pmII6+ghqSiR7HejGK3Jr/GPJYuEL9ikQibsqRmEBmYxgDGmJzZdiIRPgkU8E0exT C7t+0L8ll3T2CBZDBaFlbImApYvroGjmFe0p/Kuhq8bowvKZdls/mB2aN3Eu6VVFHPvo/zPhN qp1WHrOO9otDZxX3Xt1CcrhDCsVNVDcg9jOE3Kpp9IgLSLNXmRCDCxldZD4FU0HOsibcmeUm7 9RIqwNBNoNAfE5/aurdG2zdES2SbuCh0cLP0LojJnWxHQ48vMaUQknug6iwTayNUe7q+kVxfY bBetwKQnt/NYaDZvViPfyq3HOJl8WcN0mmpp9rztNyaPUH/tlh0ohxjLIQt0NJZvycMnBTsoa xGiKuBJaEO4MO7ukG8X4jYD+RlsFPm1cbW2v3nNqzfV1ixvBzsHSWtW1ratVBDFK3kLJGAi Precedence: bulk List-ID: X-Mailing-List: linux-parisc@vger.kernel.org All platforms that currently do not use generic clockevents roughly call the same set of functions in their timer interrupts: xtime_update(), update_process_times() and profile_tick(), sometimes in a different sequence. Add a helper function that performs all three of them, to make the callers more uniform and simplify the interface. Signed-off-by: Arnd Bergmann Reviewed-by: Geert Uytterhoeven --- include/linux/timekeeping.h | 1 + kernel/time/Kconfig | 7 +++++++ kernel/time/Makefile | 1 + kernel/time/tick-legacy.c | 19 +++++++++++++++++++ 4 files changed, 28 insertions(+) create mode 100644 kernel/time/tick-legacy.c diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h index 7f7e4a3f4394..3670cb1670ff 100644 --- a/include/linux/timekeeping.h +++ b/include/linux/timekeeping.h @@ -12,6 +12,7 @@ extern int timekeeping_suspended; /* Architecture timer tick functions: */ extern void update_process_times(int user); extern void xtime_update(unsigned long ticks); +extern void legacy_timer_tick(unsigned long ticks); /* * Get and set timeofday diff --git a/kernel/time/Kconfig b/kernel/time/Kconfig index a09b1d61df6a..f2b0cfeade47 100644 --- a/kernel/time/Kconfig +++ b/kernel/time/Kconfig @@ -61,6 +61,13 @@ config POSIX_CPU_TIMERS_TASK_WORK bool default y if POSIX_TIMERS && HAVE_POSIX_CPU_TIMERS_TASK_WORK +config LEGACY_TIMER_TICK + bool + help + The legacy timer tick helper is used by platforms that + lack support for the generic clockevent framework. + New platforms should use generic clockevents instead. + if GENERIC_CLOCKEVENTS menu "Timers subsystem" diff --git a/kernel/time/Makefile b/kernel/time/Makefile index c8f00168afe8..1fb1c1ef6a19 100644 --- a/kernel/time/Makefile +++ b/kernel/time/Makefile @@ -16,6 +16,7 @@ ifeq ($(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST),y) endif obj-$(CONFIG_GENERIC_SCHED_CLOCK) += sched_clock.o obj-$(CONFIG_TICK_ONESHOT) += tick-oneshot.o tick-sched.o +obj-$(CONFIG_LEGACY_TIMER_TICK) += tick-legacy.o obj-$(CONFIG_HAVE_GENERIC_VDSO) += vsyscall.o obj-$(CONFIG_DEBUG_FS) += timekeeping_debug.o obj-$(CONFIG_TEST_UDELAY) += test_udelay.o diff --git a/kernel/time/tick-legacy.c b/kernel/time/tick-legacy.c new file mode 100644 index 000000000000..73c5a0af4743 --- /dev/null +++ b/kernel/time/tick-legacy.c @@ -0,0 +1,19 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Timer tick function for architectures that lack generic clockevents, + * consolidated here from m68k/ia64/parisc/arm. + */ + +#include +#include +#include + +#include "tick-internal.h" + +void legacy_timer_tick(unsigned long ticks) +{ + if (ticks) + xtime_update(ticks); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); +}