[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, 15 insertions, 13 deletions

diff --git a/include/asm-s390/pgtable.h b/include/asm-s390/pgtable.h
index e965309fedac..83425cdefc91 100644
--- a/include/asm-s390/pgtable.h
+++ b/include/asm-s390/pgtable.h
@@ -554,9 +554,10 @@ static inline void __ptep_ipte(unsigned long address, pte_t *ptep)
                 /* ipte in zarch mode can do the math */
                 pte_t *pto = ptep;
 #endif
-                asm volatile ("ipte %2,%3"
-                              : "=m" (*ptep) : "m" (*ptep),
-                                "a" (pto), "a" (address) );
+                asm volatile(
+                        "       ipte    %2,%3"
+                        : "=m" (*ptep) : "m" (*ptep),
+                          "a" (pto), "a" (address));
         }
         pte_val(*ptep) = _PAGE_TYPE_EMPTY;
 }
@@ -609,16 +610,17 @@ ptep_establish(struct vm_area_struct *vma,
 /*
  * Test and clear referenced bit in storage key.
  */
-#define page_test_and_clear_young(page)                                   \
-({                                                                        \
-        struct page *__page = (page);                                     \
-        unsigned long __physpage = __pa((__page-mem_map) << PAGE_SHIFT);  \
-        int __ccode;                                                      \
-        asm volatile ("rrbe 0,%1\n\t"                                     \
-                      "ipm  %0\n\t"                                       \
-                      "srl  %0,28\n\t"                                    \
-                      : "=d" (__ccode) : "a" (__physpage) : "cc" );       \
-        (__ccode & 2);                                                    \
+#define page_test_and_clear_young(page)                                 \
+({                                                                      \
+        struct page *__page = (page);                                   \
+        unsigned long __physpage = __pa((__page-mem_map) << PAGE_SHIFT);\
+        int __ccode;                                                    \
+        asm volatile(                                                   \
+                "       rrbe    0,%1\n"                                 \
+                "       ipm     %0\n"                                   \
+                "       srl     %0,28\n"                                \
+                : "=d" (__ccode) : "a" (__physpage) : "cc");            \
+        (__ccode & 2);                                                  \
 })
 
 /*