[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, 10 insertions, 24 deletions

diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index a393c308bb29..f2b9a84dc2bf 100644
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -424,20 +424,13 @@ int pfault_init(void)
 
         if (pfault_disable)
                 return -1;
-        __asm__ __volatile__(
-                "    diag  %1,%0,0x258\n"
-                "0:  j     2f\n"
-                "1:  la    %0,8\n"
+        asm volatile(
+                "       diag    %1,%0,0x258\n"
+                "0:     j       2f\n"
+                "1:     la      %0,8\n"
                 "2:\n"
-                ".section __ex_table,\"a\"\n"
-                "   .align 4\n"
-#ifndef CONFIG_64BIT
-                "   .long  0b,1b\n"
-#else /* CONFIG_64BIT */
-                "   .quad  0b,1b\n"
-#endif /* CONFIG_64BIT */
-                ".previous"
-                : "=d" (rc) : "a" (&refbk), "m" (refbk) : "cc" );
+                EX_TABLE(0b,1b)
+                : "=d" (rc) : "a" (&refbk), "m" (refbk) : "cc");
         __ctl_set_bit(0, 9);
         return rc;
 }
@@ -450,18 +443,11 @@ void pfault_fini(void)
         if (pfault_disable)
                 return;
         __ctl_clear_bit(0,9);
-        __asm__ __volatile__(
-                "    diag  %0,0,0x258\n"
+        asm volatile(
+                "       diag    %0,0,0x258\n"
                 "0:\n"
-                ".section __ex_table,\"a\"\n"
-                "   .align 4\n"
-#ifndef CONFIG_64BIT
-                "   .long  0b,0b\n"
-#else /* CONFIG_64BIT */
-                "   .quad  0b,0b\n"
-#endif /* CONFIG_64BIT */
-                ".previous"
-                : : "a" (&refbk), "m" (refbk) : "cc" );
+                EX_TABLE(0b,0b)
+                : : "a" (&refbk), "m" (refbk) : "cc");
 }
 
 asmlinkage void