1 files changed, 9 insertions, 0 deletions

diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index bf8b4ae7ff2d..e49e9e0c69fd 100644
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -55,6 +55,7 @@ static void __init reset_tod_clock(void)
                 disabled_wait(0);
 
         sched_clock_base_cc = TOD_UNIX_EPOCH;
+        S390_lowcore.last_update_clock = sched_clock_base_cc;
 }
 
 #ifdef CONFIG_SHARED_KERNEL
@@ -167,6 +168,14 @@ static noinline __init void create_kernel_nss(void)
                 return;
         }
 
+        /* re-initialize cputime accounting. */
+        sched_clock_base_cc = get_clock();
+        S390_lowcore.last_update_clock = sched_clock_base_cc;
+        S390_lowcore.last_update_timer = 0x7fffffffffffffffULL;
+        S390_lowcore.user_timer = 0;
+        S390_lowcore.system_timer = 0;
+        asm volatile("SPT 0(%0)" : : "a" (&S390_lowcore.last_update_timer));
+
         /* re-setup boot command line with new ipl vm parms */
         ipl_update_parameters();
         setup_boot_command_line();