[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, 16 insertions, 16 deletions

diff --git a/include/asm-s390/tlbflush.h b/include/asm-s390/tlbflush.h
index 73cd85bebfb2..fa4dc916a9bf 100644
--- a/include/asm-s390/tlbflush.h
+++ b/include/asm-s390/tlbflush.h
@@ -25,7 +25,7 @@
  */
 
 #define local_flush_tlb() \
-do {  __asm__ __volatile__("ptlb": : :"memory"); } while (0)
+do {  asm volatile("ptlb": : :"memory"); } while (0)
 
 #ifndef CONFIG_SMP
 
@@ -68,24 +68,24 @@ extern void smp_ptlb_all(void);
 
 static inline void global_flush_tlb(void)
 {
+        register unsigned long reg2 asm("2");
+        register unsigned long reg3 asm("3");
+        register unsigned long reg4 asm("4");
+        long dummy;
+
 #ifndef __s390x__
         if (!MACHINE_HAS_CSP) {
                 smp_ptlb_all();
                 return;
         }
 #endif /* __s390x__ */
-        {
-                register unsigned long addr asm("4");
-                long dummy;
-
-                dummy = 0;
-                addr = ((unsigned long) &dummy) + 1;
-                __asm__ __volatile__ (
-                        "    slr  2,2\n"
-                        "    slr  3,3\n"
-                        "    csp  2,%0"
-                        : : "a" (addr), "m" (dummy) : "cc", "2", "3" );
-        }
+
+        dummy = 0;
+        reg2 = reg3 = 0;
+        reg4 = ((unsigned long) &dummy) + 1;
+        asm volatile(
+                "       csp     %0,%2"
+                : : "d" (reg2), "d" (reg3), "d" (reg4), "m" (dummy) : "cc" );
 }
 
 /*
@@ -102,9 +102,9 @@ static inline void __flush_tlb_mm(struct mm_struct * mm)
         if (unlikely(cpus_empty(mm->cpu_vm_mask)))
                 return;
         if (MACHINE_HAS_IDTE) {
-                asm volatile (".insn rrf,0xb98e0000,0,%0,%1,0"
-                              : : "a" (2048),
-                              "a" (__pa(mm->pgd)&PAGE_MASK) : "cc" );
+                asm volatile(
+                        "       .insn   rrf,0xb98e0000,0,%0,%1,0"
+                        : : "a" (2048), "a" (__pa(mm->pgd)&PAGE_MASK) : "cc");
                 return;
         }
         preempt_disable();