From 7460ed2844ffad7141e30271c0c3da8336e66014 Mon Sep 17 00:00:00 2001 From: john stultz Date: Fri, 16 Feb 2007 01:28:21 -0800 Subject: [PATCH] time: x86_64: re-enable vsyscall support for x86_64 Cleanup and re-enable vsyscall gettimeofday using the generic clocksource infrastructure. [akpm@osdl.org: cleanup] Signed-off-by: John Stultz Cc: Ingo Molnar Cc: Thomas Gleixner Cc: Andi Kleen Cc: Roman Zippel Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/x86_64/kernel/tsc.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'arch/x86_64/kernel/tsc.c') diff --git a/arch/x86_64/kernel/tsc.c b/arch/x86_64/kernel/tsc.c index 8c92f2fe7e2..89583186501 100644 --- a/arch/x86_64/kernel/tsc.c +++ b/arch/x86_64/kernel/tsc.c @@ -180,6 +180,12 @@ static cycle_t read_tsc(void) return ret; } +static cycle_t __vsyscall_fn vread_tsc(void) +{ + cycle_t ret = (cycle_t)get_cycles_sync(); + return ret; +} + static struct clocksource clocksource_tsc = { .name = "tsc", .rating = 300, @@ -188,6 +194,7 @@ static struct clocksource clocksource_tsc = { .shift = 22, .flags = CLOCK_SOURCE_IS_CONTINUOUS | CLOCK_SOURCE_MUST_VERIFY, + .vread = vread_tsc, }; void mark_tsc_unstable(void) -- cgit v1.2.3