提交 62500d1f 编写于 作者: R Richard Purdie 提交者: Russell King

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

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: NRichard Purdie <rpurdie@rpsys.net>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
上级 afe5df20
......@@ -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;
}
......
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