diff options
Diffstat (limited to 'arch/x86/kernel/vsyscall_64.c')
| -rw-r--r-- | arch/x86/kernel/vsyscall_64.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/x86/kernel/vsyscall_64.c b/arch/x86/kernel/vsyscall_64.c index dcbb28c4b69..df18f14c473 100644 --- a/arch/x86/kernel/vsyscall_64.c +++ b/arch/x86/kernel/vsyscall_64.c @@ -44,6 +44,8 @@ #include <asm/desc.h> #include <asm/topology.h> #include <asm/vgtod.h> +#include <asm/trace-clock.h> +#include <asm/timer.h> #define __vsyscall(nr) \ __attribute__ ((unused, __section__(".vsyscall_" #nr))) notrace @@ -61,6 +63,7 @@ struct vsyscall_gtod_data __vsyscall_gtod_data __section_vsyscall_gtod_data = { .lock = SEQLOCK_UNLOCKED, .sysctl_enabled = 1, + .trace_clock_is_sync = 1, }; void update_vsyscall_tz(void) @@ -73,6 +76,16 @@ void update_vsyscall_tz(void) write_sequnlock_irqrestore(&vsyscall_gtod_data.lock, flags); } +void update_trace_clock_is_sync_vdso(void) +{ + unsigned long flags; + + write_seqlock_irqsave(&vsyscall_gtod_data.lock, flags); + vsyscall_gtod_data.trace_clock_is_sync = _trace_clock_is_sync; + write_sequnlock_irqrestore(&vsyscall_gtod_data.lock, flags); +} +EXPORT_SYMBOL_GPL(update_trace_clock_is_sync_vdso); + void update_vsyscall(struct timespec *wall_time, struct timespec *wtm, struct clocksource *clock, u32 mult) { @@ -89,6 +102,7 @@ void update_vsyscall(struct timespec *wall_time, struct timespec *wtm, vsyscall_gtod_data.wall_time_nsec = wall_time->tv_nsec; vsyscall_gtod_data.wall_to_monotonic = *wtm; vsyscall_gtod_data.wall_time_coarse = __current_kernel_time(); + vsyscall_gtod_data.trace_clock_is_sync = _trace_clock_is_sync; write_sequnlock_irqrestore(&vsyscall_gtod_data.lock, flags); } |