commit e374d17cd74ec5967f81e2b0c67ec3219a2bbbcc
author Kyle McMartin <kyle@minerva.i.cabal.ca> Sat May 31 12:15:42 2008 -0400
committer Kyle McMartin <kyle@minerva.i.cabal.ca> Fri Jun 13 10:49:56 2008 -0400
tree e7383635119fc66a60edaaa36b4df2078337a86f
parent f4441b62d46e7033e907dfd6a8bb0b75b5519e88

parisc: fix miscompilation of ip_fast_csum with gcc >= 4.3

ip_fast_csum needs an asm "memory" clobber, otherwise the aggressive
optimizations in gcc-4.3 cause it to be miscompiled.

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

include/asm-parisc/checksum.h

diff --git a/include/asm-parisc/checksum.h b/include/asm-parisc/checksum.h
index cc3ec1b..e9639cc 100644
--- a/include/asm-parisc/checksum.h
+++ b/include/asm-parisc/checksum.h
@@ -65,7 +65,7 @@
 "2:\n"
 	: "=r" (sum), "=r" (iph), "=r" (ihl)
 	: "1" (iph), "2" (ihl)
-	: "r19", "r20", "r21" );
+	: "r19", "r20", "r21", "memory");
 
 	return (__force __sum16)sum;
 }