s390/time: clock comparator revalidation

Always use the S390_lowcore.clock_comparator field to revalidate
the clock comparator CPU register after a machine check. This avoids
an unnecssary external interrupt after a machine check if no timer
is pending.

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

1 files changed, 1 insertions, 4 deletions

diff --git a/arch/s390/kernel/nmi.c b/arch/s390/kernel/nmi.c
index 504175ebf8b0..c4c033819879 100644
--- a/arch/s390/kernel/nmi.c
+++ b/arch/s390/kernel/nmi.c
@@ -214,10 +214,7 @@ static int notrace s390_revalidate_registers(struct mci *mci)
                         : "0", "cc");
 #endif
         /* Revalidate clock comparator register */
-        if (S390_lowcore.clock_comparator == -1)
-                set_clock_comparator(S390_lowcore.mcck_clock);
-        else
-                set_clock_comparator(S390_lowcore.clock_comparator);
+        set_clock_comparator(S390_lowcore.clock_comparator);
         /* Check if old PSW is valid */
         if (!mci->wp)
                 /*