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authorLinus Torvalds <torvalds@woody.linux-foundation.org>2007-03-26 14:45:56 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-03-26 14:45:56 -0700
commit6288c338661cc26ea66e7818b0d3862ee163fd1d (patch)
tree49fbca961371119f8c0d476063fa3c7c0ab7124b /include
parent8b66a454bf09958b474d12981996287d19aa462d (diff)
parente675c0d2bf523a80098c843603ccc091d3720fb4 (diff)
Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6
* 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6: [S390] zcrypt: Fix ap_poll_requests counter in lost requests error path. [S390] zcrypt: Fix possible dead lock in AP bus module. [S390] cio: Device status validity. [S390] kprobes: Align probe address. [S390] Fix TCP/UDP pseudo header checksum computation. [S390] dasd: Work around gcc bug.
Diffstat (limited to 'include')
-rw-r--r--include/asm-s390/checksum.h59
1 files changed, 15 insertions, 44 deletions
diff --git a/include/asm-s390/checksum.h b/include/asm-s390/checksum.h
index 0a3cd7ec845..d5a8e7c1477 100644
--- a/include/asm-s390/checksum.h
+++ b/include/asm-s390/checksum.h
@@ -121,50 +121,21 @@ csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
unsigned short len, unsigned short proto,
__wsum sum)
{
-#ifndef __s390x__
- asm volatile(
- " alr %0,%1\n" /* sum += saddr */
- " brc 12,0f\n"
- " ahi %0,1\n" /* add carry */
- "0:"
- : "+&d" (sum) : "d" (saddr) : "cc");
- asm volatile(
- " alr %0,%1\n" /* sum += daddr */
- " brc 12,1f\n"
- " ahi %0,1\n" /* add carry */
- "1:"
- : "+&d" (sum) : "d" (daddr) : "cc");
- asm volatile(
- " alr %0,%1\n" /* sum += len + proto */
- " brc 12,2f\n"
- " ahi %0,1\n" /* add carry */
- "2:"
- : "+&d" (sum)
- : "d" (len + proto)
- : "cc");
-#else /* __s390x__ */
- asm volatile(
- " lgfr %0,%0\n"
- " algr %0,%1\n" /* sum += saddr */
- " brc 12,0f\n"
- " aghi %0,1\n" /* add carry */
- "0: algr %0,%2\n" /* sum += daddr */
- " brc 12,1f\n"
- " aghi %0,1\n" /* add carry */
- "1: algfr %0,%3\n" /* sum += len + proto */
- " brc 12,2f\n"
- " aghi %0,1\n" /* add carry */
- "2: srlg 0,%0,32\n"
- " alr %0,0\n" /* fold to 32 bits */
- " brc 12,3f\n"
- " ahi %0,1\n" /* add carry */
- "3: llgfr %0,%0"
- : "+&d" (sum)
- : "d" (saddr), "d" (daddr),
- "d" (len + proto)
- : "cc", "0");
-#endif /* __s390x__ */
- return sum;
+ __u32 csum = (__force __u32)sum;
+
+ csum += (__force __u32)saddr;
+ if (csum < (__force __u32)saddr)
+ csum++;
+
+ csum += (__force __u32)daddr;
+ if (csum < (__force __u32)daddr)
+ csum++;
+
+ csum += len + proto;
+ if (csum < len + proto)
+ csum++;
+
+ return (__force __wsum)csum;
}
/*