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| author | Will Deacon <will.deacon@arm.com> | 2013-03-28 11:17:55 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-04-03 16:45:50 +0100 |
| commit | 6f3d90e55660ba42301b5e9c7eed332cc9f70fd7 (patch) | |
| tree | 0f5ef09981f5322d80a79a12125d291adaab175b /arch/arm/kernel/smp.c | |
| parent | 93dc68876b608da041fe40ed39424b0fcd5aa2fb (diff) | |
| download | blackbird-op-linux-6f3d90e55660ba42301b5e9c7eed332cc9f70fd7.tar.gz blackbird-op-linux-6f3d90e55660ba42301b5e9c7eed332cc9f70fd7.zip | |
ARM: 7685/1: delay: use private ticks_per_jiffy field for timer-based delay ops
Commit 70264367a243 ("ARM: 7653/2: do not scale loops_per_jiffy when
using a constant delay clock") fixed a problem with our timer-based
delay loop, where loops_per_jiffy is scaled by cpufreq yet used directly
by the timer delay ops.
This patch fixes the problem in a more elegant way by keeping a private
ticks_per_jiffy field in the delay ops, independent of loops_per_jiffy
and therefore not subject to scaling. The loop-based delay continues to
use loops_per_jiffy directly, as it should.
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/kernel/smp.c')
| -rw-r--r-- | arch/arm/kernel/smp.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c index 79078edbb9bc..1f2ccccaf009 100644 --- a/arch/arm/kernel/smp.c +++ b/arch/arm/kernel/smp.c @@ -673,9 +673,6 @@ static int cpufreq_callback(struct notifier_block *nb, if (freq->flags & CPUFREQ_CONST_LOOPS) return NOTIFY_OK; - if (arm_delay_ops.const_clock) - return NOTIFY_OK; - if (!per_cpu(l_p_j_ref, cpu)) { per_cpu(l_p_j_ref, cpu) = per_cpu(cpu_data, cpu).loops_per_jiffy; |
