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| author | John Stultz <john.stultz@linaro.org> | 2015-03-12 05:16:31 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-03-12 10:16:38 +0100 |
| commit | fb82fe2fe8588745edd73aa3a6229facac5c1e15 (patch) | |
| tree | 1ab7c25dfa0e89f83f07fad2a04467d8c7864ebb /kernel/time/sched_clock.c | |
| parent | clocksource: Simplify the logic around clocksource wrapping safety margins (diff) | |
| download | linux-fb82fe2fe8588745edd73aa3a6229facac5c1e15.tar.xz linux-fb82fe2fe8588745edd73aa3a6229facac5c1e15.zip | |
clocksource: Add 'max_cycles' to 'struct clocksource'
In order to facilitate clocksource validation, add a
'max_cycles' field to the clocksource structure which
will hold the maximum cycle value that can safely be
multiplied without potentially causing an overflow.
Signed-off-by: John Stultz <john.stultz@linaro.org>
Cc: Dave Jones <davej@codemonkey.org.uk>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1426133800-29329-4-git-send-email-john.stultz@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/time/sched_clock.c')
| -rw-r--r-- | kernel/time/sched_clock.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/time/sched_clock.c b/kernel/time/sched_clock.c index 3b8ae45020c1..ca3bc5c7027c 100644 --- a/kernel/time/sched_clock.c +++ b/kernel/time/sched_clock.c @@ -126,7 +126,7 @@ void __init sched_clock_register(u64 (*read)(void), int bits, new_mask = CLOCKSOURCE_MASK(bits); /* calculate how many nanosecs until we risk wrapping */ - wrap = clocks_calc_max_nsecs(new_mult, new_shift, 0, new_mask); + wrap = clocks_calc_max_nsecs(new_mult, new_shift, 0, new_mask, NULL); new_wrap_kt = ns_to_ktime(wrap); /* update epoch for new counter and update epoch_ns from old counter*/ |