[PATCH] vmi: fix nohz compile

More goo from hrtimers integration.  We do compile and run properly with NO_HZ
enabled.  There was a period when we didn't because of a missing export, but
that was since fixed.

And with the clocksource code now firmly in place, we can get rid of code that
fixes up the wallclock, since this is done in the common infrastructure.  This
actually fixes a timer bug as well, that was caused by do_settimeofday no
longer being callable with interrupts disabled due to the use of
on_each_cpu().

Signed-off-by: Zachary Amsden <zach@vmware.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

3 files changed, 2 insertions, 16 deletions

diff --git a/arch/i386/Kconfig b/arch/i386/Kconfig
index 2f7672545fe9..e970887b9e69 100644
--- a/arch/i386/Kconfig
+++ b/arch/i386/Kconfig
@@ -220,7 +220,7 @@ config PARAVIRT
 
 config VMI
         bool "VMI Paravirt-ops support"
-        depends on PARAVIRT && !NO_HZ
+        depends on PARAVIRT
         default y
         help
           VMI provides a paravirtualized interface to multiple hypervisors
diff --git a/arch/i386/kernel/vmi.c b/arch/i386/kernel/vmi.c
index a8aa57e77029..30e8253e6eef 100644
--- a/arch/i386/kernel/vmi.c
+++ b/arch/i386/kernel/vmi.c
@@ -934,6 +934,7 @@ void __init vmi_init(void)
 #ifdef CONFIG_X86_IO_APIC
         no_timer_check = 1;
 #endif
+        no_sync_cmos_clock = 1;
 
         local_irq_restore(flags & X86_EFLAGS_IF);
 }
diff --git a/arch/i386/kernel/vmitime.c b/arch/i386/kernel/vmitime.c
index 4bb218e2eb14..d21779749838 100644
--- a/arch/i386/kernel/vmitime.c
+++ b/arch/i386/kernel/vmitime.c
@@ -153,13 +153,6 @@ static void vmi_get_wallclock_ts(struct timespec *ts)
         ts->tv_sec = wallclock;
 }
 
-static void update_xtime_from_wallclock(void)
-{
-        struct timespec ts;
-        vmi_get_wallclock_ts(&ts);
-        do_settimeofday(&ts);
-}
-
 unsigned long vmi_get_wallclock(void)
 {
         struct timespec ts;
@@ -197,18 +190,10 @@ void __init vmi_time_init(void)
         set_intr_gate(LOCAL_TIMER_VECTOR, apic_vmi_timer_interrupt);
 #endif
 
-        no_sync_cmos_clock = 1;
-
-        vmi_get_wallclock_ts(&xtime);
-        set_normalized_timespec(&wall_to_monotonic,
-                -xtime.tv_sec, -xtime.tv_nsec);
-
         real_cycles_accounted_system = read_real_cycles();
-        update_xtime_from_wallclock();
         per_cpu(process_times_cycles_accounted_cpu, 0) = read_available_cycles();
 
         cycles_per_sec = vmi_timer_ops.get_cycle_frequency();
-
         cycles_per_jiffy = cycles_per_sec;
         (void)do_div(cycles_per_jiffy, HZ);
         cycles_per_alarm = cycles_per_sec;