[PATCH 04/27] kernel: Add masks support for Raw and NTP time
From: vincenzo.frascino@arm.com (Vincenzo Frascino)
Date: 2018-11-09 12:37:07
Also in:
linux-arch
Subsystem:
generic vdso library, the rest · Maintainers:
Andy Lutomirski, Thomas Gleixner, Vincenzo Frascino, Linus Torvalds
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 --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;
--
2.19.1