diff mbox series

[04/27] kernel: Add masks support for Raw and NTP time

Message ID 20181109123730.8743-5-vincenzo.frascino@arm.com (mailing list archive)
State New, archived
Headers show
Series Unify vDSOs across more architectures | expand

Commit Message

Vincenzo Frascino Nov. 9, 2018, 12:37 p.m. UTC 
Depending on the clocksource selected there can be supported a
different resolution hence we require a mask to be applied to the
time calculation.

This patch exposes the mask in the datapage for Raw and NTP adjusted
clock.

Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
---
 include/vdso/datapage.h | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/include/vdso/datapage.h b/include/vdso/datapage.h
index d50a108afaed..fb6ce4c3f2d0 100644
--- a/include/vdso/datapage.h
+++ b/include/vdso/datapage.h
@@ -36,8 +36,10 @@  struct vdso_data {
 	__u64 tai_sec;		/* International Atomic Time */
 	__u32 tb_seq_count;	/* Timebase sequence counter */
 	__u32 cs_mono_mult;	/* NTP-adjusted clocksource multiplier */
+	__u64 cs_mono_mask;	/* NTP-adjusted clocksource mask */
 	__u32 cs_shift;		/* Clocksource shift (mono = raw) */
 	__u32 cs_raw_mult;	/* Raw clocksource multiplier */
+	__u64 cs_raw_mask;	/* Raw clocksource mask */
 	__u32 tz_minuteswest;	/* Whacky timezone stuff */
 	__u32 tz_dsttime;
 	__u32 use_syscall;