1 files changed, 5 insertions, 2 deletions

diff --git a/include/asm-powerpc/io.h b/include/asm-powerpc/io.h
index 3baff8b0fd5a..c2c5f14b5f5f 100644
--- a/include/asm-powerpc/io.h
+++ b/include/asm-powerpc/io.h
@@ -163,8 +163,11 @@ extern void _outsl_ns(volatile u32 __iomem *port, const void *buf, long count);
 
 static inline void mmiowb(void)
 {
-        __asm__ __volatile__ ("sync" : : : "memory");
-        get_paca()->io_sync = 0;
+        unsigned long tmp;
+
+        __asm__ __volatile__("sync; li %0,0; stb %0,%1(13)"
+        : "=&r" (tmp) : "i" (offsetof(struct paca_struct, io_sync))
+        : "memory");
 }
 
 /*