From: Kyle McMartin <kyle@mcmartin.ca>
Date: Mon, 8 Dec 2008 05:15:51 +0000 (+0000)
Subject: parisc: fix ipv6 checksum
X-Git-Tag: v2.6.29-rc1~38^2~4
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=5fbf6635a951a75870be9874580c55da538fb025;p=linux-2.6-omap-h63xx.git

parisc: fix ipv6 checksum

ipv6 recently started exhibiting the same symptoms as ipv4 was, add
a memory clobber around inline checksum assembly that fribbles memory
to ensure gcc doesn't erroneously cache across it.

Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
---

diff --git a/arch/parisc/include/asm/checksum.h b/arch/parisc/include/asm/checksum.h
index e9639ccc3fc..c84b2fcb18a 100644
--- a/arch/parisc/include/asm/checksum.h
+++ b/arch/parisc/include/asm/checksum.h
@@ -182,7 +182,7 @@ static __inline__ __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
 #endif
 	: "=r" (sum), "=r" (saddr), "=r" (daddr), "=r" (len)
 	: "0" (sum), "1" (saddr), "2" (daddr), "3" (len), "r" (proto)
-	: "r19", "r20", "r21", "r22");
+	: "r19", "r20", "r21", "r22", "memory");
 	return csum_fold(sum);
 }