From: Arnd Bergmann <arnd@kernel.org>
To: linux-kernel@vger.kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>,
Arnd Bergmann <arnd@arndb.de>,
Russell King <linux@armlinux.org.uk>,
Tony Luck <tony.luck@intel.com>,
Fenghua Yu <fenghua.yu@intel.com>,
Greg Ungerer <gerg@linux-m68k.org>,
Finn Thain <fthain@telegraphics.com.au>,
Philip Blundell <philb@gnu.org>,
Joshua Thompson <funaho@jurai.org>, Sam Creasey <sammy@sammy.net>,
"James E.J. Bottomley" <James.Bottomley@hansenpartnership.com>,
Helge Deller <deller@gmx.de>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
John Stultz <john.stultz@linaro.org>,
Stephen Boyd <sboyd@kernel.org>,
Linus Walleij <linus.walleij@linaro.org>,
linux-ia64@vger.kernel.org,
Parisc List <linux-parisc@vger.kernel.org>,
linux-m68k <linux-m68k@lists.linux-m68k.org>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
Geert Uytterhoeven <geert@linux-m68k.org>
Subject: [PATCH v2 04/15] timekeeping: add CONFIG_LEGACY_TIMER_TICK
Date: Fri, 30 Oct 2020 16:17:47 +0100 [thread overview]
Message-ID: <20201030151758.1241164-5-arnd@kernel.org> (raw)
In-Reply-To: <20201030151758.1241164-1-arnd@kernel.org>
From: Arnd Bergmann <arnd@arndb.de>
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.
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
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 51d298ccbe05..c6867f29d279 100644
--- a/kernel/time/Kconfig
+++ b/kernel/time/Kconfig
@@ -57,6 +57,13 @@ 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 <linux/irq.h>
+#include <linux/profile.h>
+#include <linux/timekeeper_internal.h>
+
+#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);
+}
--
2.27.0
next prev parent reply other threads:[~2020-10-30 15:27 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-30 15:17 [PATCH v2 00/15] timers: clean up ARCH_GETTIMEOFFSET, LEGACY_TIMER_TICK Arnd Bergmann
2020-10-30 15:17 ` [PATCH v2 01/15] ARM: remove ebsa110 platform Arnd Bergmann
2020-10-30 15:17 ` [PATCH v2 02/15] net: remove am79c961a driver Arnd Bergmann
2020-10-30 15:17 ` [PATCH v2 03/15] timekeeping: remove arch_gettimeoffset Arnd Bergmann
2020-10-30 15:17 ` Arnd Bergmann [this message]
2020-10-30 15:17 ` [PATCH v2 05/15] ia64: convert to legacy_timer_tick Arnd Bergmann
2020-12-18 21:29 ` John Paul Adrian Glaubitz
2020-12-18 22:07 ` Arnd Bergmann
2020-12-18 22:13 ` John Paul Adrian Glaubitz
2020-12-18 22:32 ` John Paul Adrian Glaubitz
2020-10-30 15:17 ` [PATCH v2 06/15] ARM: rpc: use legacy_timer_tick Arnd Bergmann
2020-10-30 15:17 ` [PATCH v2 07/15] parisc: " Arnd Bergmann
2020-10-30 17:13 ` Helge Deller
2020-10-30 19:33 ` Arnd Bergmann
2020-10-30 19:48 ` Helge Deller
2020-10-30 20:37 ` Arnd Bergmann
2020-10-30 15:17 ` [PATCH v2 08/15] m68k: coldfire: use legacy_timer_tick() Arnd Bergmann
2020-10-30 15:17 ` [PATCH v2 09/15] m68k: split heartbeat out of timer function Arnd Bergmann
2020-10-30 15:17 ` [PATCH v2 10/15] m68k: sun3/sun3c: use legacy_timer_tick Arnd Bergmann
2020-10-30 15:17 ` [PATCH v2 11/15] m68k: m68328: use legacy_timer_tick() Arnd Bergmann
2020-10-30 15:17 ` [PATCH v2 12/15] m68k: change remaining timers to legacy_timer_tick Arnd Bergmann
2020-10-30 15:17 ` [PATCH v2 13/15] m68k: remove timer_interrupt() function Arnd Bergmann
2020-10-30 15:17 ` [PATCH v2 14/15] timekeeping: remove xtime_update Arnd Bergmann
2020-10-30 15:17 ` [PATCH v2 15/15] timekeeping: default GENERIC_CLOCKEVENTS to enabled Arnd Bergmann
2020-11-01 3:43 ` [PATCH v2 00/15] timers: clean up ARCH_GETTIMEOFFSET, LEGACY_TIMER_TICK Finn Thain
2020-11-01 9:53 ` Arnd Bergmann
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