posixaio: speedup by using aio_suspend() instead of manual waiting

[fio.git] / arch / arch-s390.h

diff --git a/arch/arch-s390.h b/arch/arch-s390.h
index ed5d462d1d969b7e2db4cb994a88115813b24b44..5e13155951111876c6878b8a707c037970ece2ea 100644 (file)
--- a/arch/arch-s390.h
+++ b/arch/arch-s390.h
@@ -14,5 +14,6 @@
 
 #define nop            asm volatile ("diag 0,0,68" : : : "memory")
 #define fio_ffz(v)     generic_ffz((v))
+#define read_barrier() asm volatile("bcr 15,0" : : : "memory")
 
 #endif