From 4ff61ecf6949e0ab2c062b40e0111f39e3956a0d Mon Sep 17 00:00:00 2001 From: Bob Breuer Date: Wed, 14 Feb 2007 09:22:53 +0100 Subject: [PATCH] SPARC32: Fix over-optimization by GCC near ip_fast_csum. In some cases such as: iph->check = 0; iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); GCC may optimize out the previous store. Observed as a failure of NFS over udp (bad checksums on ip fragments) when compiled with GCC 3.4.2. Signed-off-by: Bob Breuer Signed-off-by: David S. Miller Signed-off-by: Adrian Bunk --- include/asm-sparc/checksum.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/asm-sparc/checksum.h b/include/asm-sparc/checksum.h index 286158108974..acde719e0017 100644 --- a/include/asm-sparc/checksum.h +++ b/include/asm-sparc/checksum.h @@ -159,7 +159,7 @@ static inline unsigned short ip_fast_csum(const unsigned char *iph, "xnor\t%%g0, %0, %0" : "=r" (sum), "=&r" (iph) : "r" (ihl), "1" (iph) - : "g2", "g3", "g4", "cc"); + : "g2", "g3", "g4", "cc", "memory"); return sum; } -- 2.39.5