[PATCH 01/11] perf/x86: Fix native_perf_sched_clock_from_tsc() with __sched_clock_offset

[Adrian Hunter <adrian.hunter@intel.com>]

native_perf_sched_clock_from_tsc() is used to produce a time value that can
be consistent with perf_clock().  Consequently, it should be adjusted by
__sched_clock_offset, the same as perf_clock() would be.

Fixes: 698eff6355f735 ("sched/clock, x86/perf: Fix perf test tsc")
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
 arch/x86/kernel/tsc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c
index a698196377be..c1c73fe324cd 100644
--- a/arch/x86/kernel/tsc.c
+++ b/arch/x86/kernel/tsc.c
@@ -242,7 +242,8 @@ u64 native_sched_clock(void)
  */
 u64 native_sched_clock_from_tsc(u64 tsc)
 {
-	return cycles_2_ns(tsc);
+	return cycles_2_ns(tsc) +
+	       (sched_clock_stable() ? __sched_clock_offset : 0);
 }
 
 /* We need to define a real function for sched_clock, to override the
-- 
2.25.1