[S390] boot cputime accounting

Start the cpu time accounting very early to catch the cpu time spent
for the initial kernel setup. To make the output of /proc/uptime
match the sum of all cpu accounting values of the boot cpu reset
xtime and wall_to_monotonic to sane values based on the TOD clock.
The values set by timekeeping_init are off by up to a second.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 163bdfe5a6be..7402b6a39ead 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -434,6 +434,14 @@ setup_lowcore(void)
 #else
         lc->vdso_per_cpu_data = (unsigned long) &lc->paste[0];
 #endif
+        lc->sync_enter_timer = S390_lowcore.sync_enter_timer;
+        lc->async_enter_timer = S390_lowcore.async_enter_timer;
+        lc->exit_timer = S390_lowcore.exit_timer;
+        lc->user_timer = S390_lowcore.user_timer;
+        lc->system_timer = S390_lowcore.system_timer;
+        lc->steal_timer = S390_lowcore.steal_timer;
+        lc->last_update_timer = S390_lowcore.last_update_timer;
+        lc->last_update_clock = S390_lowcore.last_update_clock;
         set_prefix((u32)(unsigned long) lc);
         lowcore_ptr[0] = lc;
 }