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Subject[PATCH 4.14 021/110] parisc: Use cr16 interval timers unconditionally on qemu
Date
4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Helge Deller <deller@gmx.de>

commit 5ffa8518851f1401817c15d2a7eecc0373c26ff9 upstream.

When running on qemu we know that the (emulated) cr16 cpu-internal
clocks are syncronized. So let's use them unconditionally on qemu.

Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org # 4.14+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
arch/parisc/include/asm/processor.h | 2 ++
arch/parisc/kernel/time.c | 2 +-
2 files changed, 3 insertions(+), 1 deletion(-)

--- a/arch/parisc/include/asm/processor.h
+++ b/arch/parisc/include/asm/processor.h
@@ -316,6 +316,8 @@ extern int _parisc_requires_coherency;
#define parisc_requires_coherency() (0)
#endif

+extern int running_on_qemu;
+
#endif /* __ASSEMBLY__ */

#endif /* __ASM_PARISC_PROCESSOR_H */
--- a/arch/parisc/kernel/time.c
+++ b/arch/parisc/kernel/time.c
@@ -248,7 +248,7 @@ static int __init init_cr16_clocksource(
* different sockets, so mark them unstable and lower rating on
* multi-socket SMP systems.
*/
- if (num_online_cpus() > 1) {
+ if (num_online_cpus() > 1 && !running_on_qemu) {
int cpu;
unsigned long cpu0_loc;
cpu0_loc = per_cpu(cpu_data, 0).cpu_loc;

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