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| author | Helge Deller <deller@gmx.de> | 2016-08-19 22:39:02 +0200 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2016-08-20 13:33:51 +0200 |
| commit | ae141830b118c3fb5b7eab6fa7c8ab7b7224b0a4 (patch) | |
| tree | fd979258426d4387ef492955b03649118e84c5ef /arch/parisc | |
| parent | 6040e57658eee6eb1315a26119101ca832d1f854 (diff) | |
| download | op-kernel-dev-ae141830b118c3fb5b7eab6fa7c8ab7b7224b0a4.zip op-kernel-dev-ae141830b118c3fb5b7eab6fa7c8ab7b7224b0a4.tar.gz | |
parisc: Fix automatic selection of cr16 clocksource
Commit 54b66800907 (parisc: Add native high-resolution sched_clock()
implementation) added support to use the CPU-internal cr16 counters as reliable
clocksource with the help of HAVE_UNSTABLE_SCHED_CLOCK.
Sadly the commit missed to remove the hack which prevented cr16 to become the
default clocksource even on SMP systems.
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org # 4.7+
Diffstat (limited to 'arch/parisc')
| -rw-r--r-- | arch/parisc/kernel/processor.c | 8 | ||||
| -rw-r--r-- | arch/parisc/kernel/time.c | 12 |
2 files changed, 0 insertions, 20 deletions
diff --git a/arch/parisc/kernel/processor.c b/arch/parisc/kernel/processor.c index 5adc339..0c2a94a 100644 --- a/arch/parisc/kernel/processor.c +++ b/arch/parisc/kernel/processor.c @@ -51,8 +51,6 @@ EXPORT_SYMBOL(_parisc_requires_coherency); DEFINE_PER_CPU(struct cpuinfo_parisc, cpu_data); -extern int update_cr16_clocksource(void); /* from time.c */ - /* ** PARISC CPU driver - claim "device" and initialize CPU data structures. ** @@ -228,12 +226,6 @@ static int processor_probe(struct parisc_device *dev) } #endif - /* If we've registered more than one cpu, - * we'll use the jiffies clocksource since cr16 - * is not synchronized between CPUs. - */ - update_cr16_clocksource(); - return 0; } diff --git a/arch/parisc/kernel/time.c b/arch/parisc/kernel/time.c index 505cf1a..4b0b963 100644 --- a/arch/parisc/kernel/time.c +++ b/arch/parisc/kernel/time.c @@ -221,18 +221,6 @@ static struct clocksource clocksource_cr16 = { .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; -int update_cr16_clocksource(void) -{ - /* since the cr16 cycle counters are not synchronized across CPUs, - we'll check if we should switch to a safe clocksource: */ - if (clocksource_cr16.rating != 0 && num_online_cpus() > 1) { - clocksource_change_rating(&clocksource_cr16, 0); - return 1; - } - - return 0; -} - void __init start_cpu_itimer(void) { unsigned int cpu = smp_processor_id(); |
