Re: [PATCH] Fix ppc64 out_be64

[Benjamin Herrenschmidt <benh@kernel.crashing.org>]

> Yes, that looks fine (after fixing val to be unsigned long in
> out_be64).  You know infinitely more about ppc64 asm than I do so I'm
> sure your version is better.

Well, I may know ppc asm, but gcc inline asm still drives me nuts :)

Here's a fixed version (Andrew, please apply)

----

Patch fixes out_be64 implementation on ppc64 along with a glich in
out_be32 (inconsistent) use of barrier.

Signed-off-by: Roland Dreier <roland@topspin.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

===== include/asm-ppc64/io.h 1.18 vs edited =====
--- 1.18/include/asm-ppc64/io.h	2004-05-21 02:50:11 -05:00
+++ edited/include/asm-ppc64/io.h	2004-06-13 12:09:16 -05:00
@@ -307,7 +307,7 @@
 
 static inline void out_be32(volatile unsigned *addr, int val)
 {
-	__asm__ __volatile__("stw%U0%X0 %1,%0; eieio"
+	__asm__ __volatile__("stw%U0%X0 %1,%0; sync"
 			     : "=m" (*addr) : "r" (val));
 }
 
@@ -356,9 +356,9 @@
 			     : "=&r" (tmp) , "=&r" (val) : "1" (val) , "b" (addr) , "m" (*addr));
 }
 
-static inline void out_be64(volatile unsigned long *addr, int val)
+static inline void out_be64(volatile unsigned long *addr, unsigned long val)
 {
-	__asm__ __volatile__("std %1,0(%0); sync" : "=m" (*addr) : "r" (val));
+	__asm__ __volatile__("std%U0%X0 %1,%0; sync" : "=m" (*addr) : "r" (val));
 }
 
 #ifndef CONFIG_PPC_ISERIES