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parisc: fix miscompilation of ip_fast_csum with gcc >= 4.3

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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>
This commit is contained in:
Kyle McMartin 2008-05-31 12:15:42 -04:00
parent f4441b62d4
commit e374d17cd7
1 changed files with 1 additions and 1 deletions
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2
include/asm-parisc/checksum.h
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@ -65,7 +65,7 @@ static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl)
"2:\n"
: "=r" (sum), "=r" (iph), "=r" (ihl)
: "1" (iph), "2" (ihl)
: "r19", "r20", "r21" );
: "r19", "r20", "r21", "memory");
return (__force __sum16)sum;
}