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| author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2009-10-01 15:44:02 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-10-01 16:11:12 -0700 |
| commit | 392d814daf460a9564d29b2cebc51e1ea34e0504 (patch) | |
| tree | 7a39c419e49200fb6b7d18a479a728f28ac7a117 /arch/x86/include/asm/checksum_32.h | |
| parent | d22a001bf6a502e978a8617e3f297b4d762cfbb5 (diff) | |
| download | lwn-392d814daf460a9564d29b2cebc51e1ea34e0504.tar.gz lwn-392d814daf460a9564d29b2cebc51e1ea34e0504.zip | |
x86: fix csum_ipv6_magic asm memory clobber
Just like ip_fast_csum, the assembly snippet in csum_ipv6_magic needs a
memory clobber, as it is only passed the address of the buffer, not a
memory reference to the buffer itself.
This caused failures in Hurd's pfinetv4 when we tried to compile it with
gcc-4.3 (bogus checksums).
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Acked-by: "David S. Miller" <davem@davemloft.net>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86/include/asm/checksum_32.h')
| -rw-r--r-- | arch/x86/include/asm/checksum_32.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/include/asm/checksum_32.h b/arch/x86/include/asm/checksum_32.h index 7c5ef8b14d92..46fc474fd819 100644 --- a/arch/x86/include/asm/checksum_32.h +++ b/arch/x86/include/asm/checksum_32.h @@ -161,7 +161,8 @@ static inline __sum16 csum_ipv6_magic(const struct in6_addr *saddr, "adcl $0, %0 ;\n" : "=&r" (sum) : "r" (saddr), "r" (daddr), - "r" (htonl(len)), "r" (htonl(proto)), "0" (sum)); + "r" (htonl(len)), "r" (htonl(proto)), "0" (sum) + : "memory"); return csum_fold(sum); } |