[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, 1 insertions, 12 deletions

diff --git a/include/asm-s390/uaccess.h b/include/asm-s390/uaccess.h
index e2047b0c9092..72ae4efddb49 100644
--- a/include/asm-s390/uaccess.h
+++ b/include/asm-s390/uaccess.h
@@ -38,25 +38,14 @@
 #define get_ds()        (KERNEL_DS)
 #define get_fs()        (current->thread.mm_segment)
 
-#ifdef __s390x__
 #define set_fs(x) \
 ({                                                                      \
         unsigned long __pto;                                            \
         current->thread.mm_segment = (x);                               \
         __pto = current->thread.mm_segment.ar4 ?                        \
                 S390_lowcore.user_asce : S390_lowcore.kernel_asce;      \
-        asm volatile ("lctlg 7,7,%0" : : "m" (__pto) );                 \
+        __ctl_load(__pto, 7, 7);                                        \
 })
-#else /* __s390x__ */
-#define set_fs(x) \
-({                                                                      \
-        unsigned long __pto;                                            \
-        current->thread.mm_segment = (x);                               \
-        __pto = current->thread.mm_segment.ar4 ?                        \
-                S390_lowcore.user_asce : S390_lowcore.kernel_asce;      \
-        asm volatile ("lctl  7,7,%0" : : "m" (__pto) );                 \
-})
-#endif /* __s390x__ */
 
 #define segment_eq(a,b) ((a).ar4 == (b).ar4)