Geert Uytterhoeven 64a7976b4f time: Make sure jiffies_to_msecs() preserves non-zero time periods ... commit abcbcb80cd upstream. For the common cases where 1000 is a multiple of HZ, or HZ is a multiple of 1000, jiffies_to_msecs() never returns zero when passed a non-zero time period. However, if HZ > 1000 and not an integer multiple of 1000 (e.g. 1024 or 1200, as used on alpha and DECstation), jiffies_to_msecs() may return zero for small non-zero time periods. This may break code that relies on receiving back a non-zero value. jiffies_to_usecs() does not need such a fix: one jiffy can only be less than one µs if HZ > 1000000, and such large values of HZ are already rejected at build time, twice: - include/linux/jiffies.h does #error if HZ >= 12288, - kernel/time/time.c has BUILD_BUG_ON(HZ > USEC_PER_SEC). Broken since forever. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Cc: John Stultz <john.stultz@linaro.org> Cc: Stephen Boyd <sboyd@kernel.org> Cc: linux-alpha@vger.kernel.org Cc: linux-mips@linux-mips.org Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/20180622143357.7495-1-geert@linux-m68k.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2018-07-03 11:21:30 +02:00
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alarmtimer.c	alarmtimer: don't rate limit one-shot timers	2017-07-27 15:06:10 -07:00
clockevents.c
clocksource.c	clocksource: Allow unregistering the watchdog	2016-09-15 08:27:47 +02:00
hrtimer.c	hrtimer: Ensure POSIX compliance (relative CLOCK_REALTIME hrtimers)	2018-03-03 10:19:41 +01:00
itimer.c
jiffies.c
Kconfig
Makefile
ntp_internal.h
ntp.c	ntp: Fix ADJ_SETOFFSET being used w/ ADJ_NANO	2016-09-15 08:27:47 +02:00
posix-clock.c	time: Change posix clocks ops interfaces to use timespec64	2018-03-24 10:58:40 +01:00
posix-cpu-timers.c
posix-timers.c	posix-timer: Properly check sigevent->sigev_notify	2018-02-16 20:09:40 +01:00
sched_clock.c	timers, sched_clock: Update timeout for clock wrap	2018-03-22 09:23:21 +01:00
test_udelay.c
tick-broadcast-hrtimer.c
tick-broadcast.c	tick/broadcast: Use for_each_cpu() specially on UP kernels	2018-05-26 08:48:56 +02:00
tick-common.c
tick-internal.h
tick-oneshot.c
tick-sched.c	nohz: Prevent a timer interrupt storm in tick_nohz_stop_sched_tick()	2018-01-02 20:33:28 +01:00
tick-sched.h
time.c	time: Make sure jiffies_to_msecs() preserves non-zero time periods	2018-07-03 11:21:30 +02:00
timeconst.bc
timeconv.c
timecounter.c
timekeeping_debug.c	timekeeping: Cap array access in timekeeping_debug	2016-09-15 08:27:52 +02:00
timekeeping_internal.h
timekeeping.c	time: Fix CLOCK_MONOTONIC_RAW sub-nanosecond accounting	2018-05-26 08:49:00 +02:00
timekeeping.h
timer_list.c	sysrq: Reset the watchdog timers while displaying high-resolution timers	2018-03-22 09:23:21 +01:00
timer_stats.c
timer.c	timers: Plug locking race vs. timer migration	2018-01-31 12:06:08 +01:00