[S390] Inline assembly cleanup.

Major cleanup of all s390 inline assemblies. They now have a common
coding style. Quite a few have been shortened, mainly by using register
asm variables. Use of the EX_TABLE macro helps  as well. The atomic ops,
bit ops and locking inlines new use the Q-constraint if a newer gcc
is used.  That results in slightly better code.

Thanks to Christian Borntraeger for proof reading the changes.

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

1 files changed, 6 insertions, 4 deletions

diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c
index 74e6178fbaf2..1981c6199fa2 100644
--- a/arch/s390/kernel/time.c
+++ b/arch/s390/kernel/time.c
@@ -351,10 +351,12 @@ void __init time_init(void)
         int cc;
 
         /* kick the TOD clock */
-        asm volatile ("STCK 0(%1)\n\t"
-                      "IPM  %0\n\t"
-                      "SRL  %0,28" : "=r" (cc) : "a" (&init_timer_cc) 
-                                   : "memory", "cc");
+        asm volatile(
+                "       stck    0(%2)\n"
+                "       ipm     %0\n"
+                "       srl     %0,28"
+                : "=d" (cc), "=m" (init_timer_cc)
+                : "a" (&init_timer_cc) : "cc");
         switch (cc) {
         case 0: /* clock in set state: all is fine */
                 break;