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| author | Arnd Bergmann <arnd@arndb.de> | 2020-09-24 15:21:43 +0200 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2020-10-30 21:57:04 +0100 |
| commit | b3550164a19d62e515af6cacb5a31f0b2b3f9501 (patch) | |
| tree | 237ecf1236ea097d572c1021d704933def5bbaeb /kernel/time | |
| parent | 77f6c0b87479c4578ac0798fc249637092ac45a3 (diff) | |
| download | linux-stable-b3550164a19d62e515af6cacb5a31f0b2b3f9501.tar.gz linux-stable-b3550164a19d62e515af6cacb5a31f0b2b3f9501.tar.bz2 linux-stable-b3550164a19d62e515af6cacb5a31f0b2b3f9501.zip | |
timekeeping: add CONFIG_LEGACY_TIMER_TICK
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>
Diffstat (limited to 'kernel/time')
| -rw-r--r-- | kernel/time/Kconfig | 7 | ||||
| -rw-r--r-- | kernel/time/Makefile | 1 | ||||
| -rw-r--r-- | kernel/time/tick-legacy.c | 19 |
3 files changed, 27 insertions, 0 deletions
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); +} |