[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, 15 deletions

diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index 6555cc48e28f..1f5e782b3d05 100644
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -120,24 +120,15 @@ static enum shutdown_action on_panic_action = SHUTDOWN_STOP;
 
 static int diag308(unsigned long subcode, void *addr)
 {
-        register unsigned long _addr asm("0") = (unsigned long)addr;
+        register unsigned long _addr asm("0") = (unsigned long) addr;
         register unsigned long _rc asm("1") = 0;
 
-        asm volatile (
-                "   diag %0,%2,0x308\n"
-                "0: \n"
-                ".section __ex_table,\"a\"\n"
-#ifdef CONFIG_64BIT
-                "   .align 8\n"
-                "   .quad 0b, 0b\n"
-#else
-                "   .align 4\n"
-                "   .long 0b, 0b\n"
-#endif
-                ".previous\n"
+        asm volatile(
+                "       diag    %0,%2,0x308\n"
+                "0:\n"
+                EX_TABLE(0b,0b)
                 : "+d" (_addr), "+d" (_rc)
-                : "d" (subcode) : "cc", "memory" );
-
+                : "d" (subcode) : "cc", "memory");
         return _rc;
 }