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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-08-12 21:25:01 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-08-12 21:25:01 +0300 |
| commit | 30065bfda900a844d9c88bc4d5d298025a4fef5e (patch) | |
| tree | 4d7729b04ac3f5d221d1ca5a35bd9445befa7a5b | |
| parent | 04da002d98852b38083beb9725967609945a8747 (diff) | |
| parent | 878854a374620a3f5e8c0a3c418e82a429bc2cff (diff) | |
| download | linux-30065bfda900a844d9c88bc4d5d298025a4fef5e.tar.xz | |
Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fix from Catalin Marinas:
"Fix coarse clock monotonicity (VDSO timestamp off by one jiffy
compared to the syscall one)"
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: VDSO: fix coarse clock monotonicity regression
| -rw-r--r-- | arch/arm64/kernel/vdso.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/arch/arm64/kernel/vdso.c b/arch/arm64/kernel/vdso.c index ec37ab3f524f..97bc68f4c689 100644 --- a/arch/arm64/kernel/vdso.c +++ b/arch/arm64/kernel/vdso.c @@ -199,16 +199,15 @@ up_fail: */ void update_vsyscall(struct timekeeper *tk) { - struct timespec xtime_coarse; u32 use_syscall = strcmp(tk->tkr_mono.clock->name, "arch_sys_counter"); ++vdso_data->tb_seq_count; smp_wmb(); - xtime_coarse = __current_kernel_time(); vdso_data->use_syscall = use_syscall; - vdso_data->xtime_coarse_sec = xtime_coarse.tv_sec; - vdso_data->xtime_coarse_nsec = xtime_coarse.tv_nsec; + vdso_data->xtime_coarse_sec = tk->xtime_sec; + vdso_data->xtime_coarse_nsec = tk->tkr_mono.xtime_nsec >> + tk->tkr_mono.shift; vdso_data->wtm_clock_sec = tk->wall_to_monotonic.tv_sec; vdso_data->wtm_clock_nsec = tk->wall_to_monotonic.tv_nsec; |