[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, 8 insertions, 8 deletions

diff --git a/arch/s390/mm/extmem.c b/arch/s390/mm/extmem.c
index 9b11e3e20903..226275d5c4f6 100644
--- a/arch/s390/mm/extmem.c
+++ b/arch/s390/mm/extmem.c
@@ -142,17 +142,17 @@ dcss_diag (__u8 func, void *parameter,
 
         rx = (unsigned long) parameter;
         ry = (unsigned long) func;
-        __asm__ __volatile__(
+        asm volatile(
 #ifdef CONFIG_64BIT
-                "   sam31\n" // switch to 31 bit
-                "   diag    %0,%1,0x64\n"
-                "   sam64\n" // switch back to 64 bit
+                "       sam31\n"
+                "       diag    %0,%1,0x64\n"
+                "       sam64\n"
 #else
-                "   diag    %0,%1,0x64\n"
+                "       diag    %0,%1,0x64\n"
 #endif
-                "   ipm     %2\n"
-                "   srl     %2,28\n"
-                : "+d" (rx), "+d" (ry), "=d" (rc) : : "cc" );
+                "       ipm     %2\n"
+                "       srl     %2,28\n"
+                : "+d" (rx), "+d" (ry), "=d" (rc) : : "cc");
         *ret1 = rx;
         *ret2 = ry;
         return rc;