Messages in this thread Patch in this message |  | | From | Erez Geva <> | Subject | [PATCH 2/7] Function to retrieve main clock state | Date | Thu, 1 Oct 2020 22:51:36 +0200 |
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Add kernel function to retrieve main clock oscillator state. As calibration is done from user space daemon, the kernel access function permit read only.
Signed-off-by: Erez Geva <erez.geva.ext@siemens.com> --- include/linux/timex.h | 1 + kernel/time/timekeeping.c | 9 +++++++++ 2 files changed, 10 insertions(+)
diff --git a/include/linux/timex.h b/include/linux/timex.h index ce0859763670..03bc63bf3073 100644 --- a/include/linux/timex.h +++ b/include/linux/timex.h @@ -153,6 +153,7 @@ extern unsigned long tick_nsec; /* SHIFTED_HZ period (nsec) */ extern int do_adjtimex(struct __kernel_timex *); extern int do_clock_adjtime(const clockid_t which_clock, struct __kernel_timex * ktx); +extern int adjtimex(struct __kernel_timex *txc); extern void hardpps(const struct timespec64 *, const struct timespec64 *); diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index 4c47f388a83f..2248fa257ff8 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -2372,6 +2372,15 @@ int do_adjtimex(struct __kernel_timex *txc) return ret; } +int adjtimex(struct __kernel_timex *txc) +{ + if (txc->modes != 0) + return -EINVAL; + + return do_adjtimex(txc); +} +EXPORT_SYMBOL_GPL(adjtimex); + #ifdef CONFIG_NTP_PPS /** * hardpps() - Accessor function to NTP __hardpps function -- 2.20.1
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