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>
This commit is contained in:
parent
d22a001bf6
commit
392d814daf
|
@ -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);
|
||||
}
|
||||
|
|
Loading…
Reference in a new issue