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[ARM] 3292/1: Fix memory corruption in asm-arm/checksum.h: ip_fast_csum()

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Patch from Richard Purdie

ip_fast_csum() accesses memory via a pointer (iph) within an
asm function. To prevent memory corruption when the function is
inlined, it needs "memory" on the clobber list.

This fixes ip checksum errors reported by a Zaurus user.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Richard Purdie 2006-02-01 19:26:00 +00:00 committed by Russell King
parent afe5df208e
commit 62500d1f8e
1 changed files with 1 additions and 1 deletions
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include/asm-arm/checksum.h
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@ -77,7 +77,7 @@ ip_fast_csum(unsigned char * iph, unsigned int ihl)
mov %0, %0, lsr #16"
: "=r" (sum), "=r" (iph), "=r" (ihl), "=r" (tmp1)
: "1" (iph), "2" (ihl)
: "cc");
: "cc", "memory");
return sum;
}