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author | Thomas Gleixner <tglx@linutronix.de> | 2015-08-20 22:13:22 +0300 |
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committer | Thomas Gleixner <tglx@linutronix.de> | 2015-08-20 22:13:22 +0300 |
commit | 05ddaa4d6d3806bebdf14f7c5de742a6e0e3b689 (patch) | |
tree | cbad6d1db5ce324c75b0eecdfd4c0857cfee9347 /kernel/time/timekeeping.c | |
parent | b48362d8aaf32aeb4a75f5c556c652ffeeb1be5d (diff) | |
parent | 9ca308506062fc4a4ee8ca7ad2f71033c831c2fb (diff) | |
download | linux-05ddaa4d6d3806bebdf14f7c5de742a6e0e3b689.tar.xz |
Merge branch 'fortglx/4.3/time' of https://git.linaro.org/people/john.stultz/linux into timers/core
- A handful or y2038 related items
- A walltime to monotonic limit
- Small fixes for timespec_trunc() and timer_list output
Diffstat (limited to 'kernel/time/timekeeping.c')
-rw-r--r-- | kernel/time/timekeeping.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index bca3667a2de1..f6ee2e6b6f5d 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -911,6 +911,7 @@ int do_settimeofday64(const struct timespec64 *ts) struct timekeeper *tk = &tk_core.timekeeper; struct timespec64 ts_delta, xt; unsigned long flags; + int ret = 0; if (!timespec64_valid_strict(ts)) return -EINVAL; @@ -924,10 +925,15 @@ int do_settimeofday64(const struct timespec64 *ts) ts_delta.tv_sec = ts->tv_sec - xt.tv_sec; ts_delta.tv_nsec = ts->tv_nsec - xt.tv_nsec; + if (timespec64_compare(&tk->wall_to_monotonic, &ts_delta) > 0) { + ret = -EINVAL; + goto out; + } + tk_set_wall_to_mono(tk, timespec64_sub(tk->wall_to_monotonic, ts_delta)); tk_set_xtime(tk, ts); - +out: timekeeping_update(tk, TK_CLEAR_NTP | TK_MIRROR | TK_CLOCK_WAS_SET); write_seqcount_end(&tk_core.seq); @@ -936,7 +942,7 @@ int do_settimeofday64(const struct timespec64 *ts) /* signal hrtimers about time change */ clock_was_set(); - return 0; + return ret; } EXPORT_SYMBOL(do_settimeofday64); @@ -965,7 +971,8 @@ int timekeeping_inject_offset(struct timespec *ts) /* Make sure the proposed value is valid */ tmp = timespec64_add(tk_xtime(tk), ts64); - if (!timespec64_valid_strict(&tmp)) { + if (timespec64_compare(&tk->wall_to_monotonic, &ts64) > 0 || + !timespec64_valid_strict(&tmp)) { ret = -EINVAL; goto error; } @@ -1874,7 +1881,7 @@ struct timespec __current_kernel_time(void) return timespec64_to_timespec(tk_xtime(tk)); } -struct timespec current_kernel_time(void) +struct timespec64 current_kernel_time64(void) { struct timekeeper *tk = &tk_core.timekeeper; struct timespec64 now; @@ -1886,9 +1893,9 @@ struct timespec current_kernel_time(void) now = tk_xtime(tk); } while (read_seqcount_retry(&tk_core.seq, seq)); - return timespec64_to_timespec(now); + return now; } -EXPORT_SYMBOL(current_kernel_time); +EXPORT_SYMBOL(current_kernel_time64); struct timespec64 get_monotonic_coarse64(void) { |