1 files changed, 18 insertions, 38 deletions

diff --git a/include/asm-arm/checksum.h b/include/asm-arm/checksum.h
index 8c0bb5bb14ee..eaa0efd8d0d4 100644
--- a/include/asm-arm/checksum.h
+++ b/include/asm-arm/checksum.h
@@ -40,13 +40,27 @@ __wsum
 csum_partial_copy_from_user(const void __user *src, void *dst, int len, __wsum sum, int *err_ptr);
 
 /*
+ *      Fold a partial checksum without adding pseudo headers
+ */
+static inline __sum16 csum_fold(__wsum sum)
+{
+        __asm__(
+        "add    %0, %1, %1, ror #16     @ csum_fold"
+        : "=r" (sum)
+        : "r" (sum)
+        : "cc");
+        return (__force __sum16)(~(__force u32)sum >> 16);
+}
+
+/*
  *      This is a version of ip_compute_csum() optimized for IP headers,
  *      which always checksum on 4 octet boundaries.
  */
 static inline __sum16
 ip_fast_csum(const void *iph, unsigned int ihl)
 {
-        unsigned int sum, tmp1;
+        unsigned int tmp1;
+        __wsum sum;
 
         __asm__ __volatile__(
         "ldr    %0, [%1], #4            @ ip_fast_csum          \n\
@@ -62,29 +76,11 @@ ip_fast_csum(const void *iph, unsigned int ihl)
         subne   %2, %2, #1              @ without destroying    \n\
         bne     1b                      @ the carry flag        \n\
         adcs    %0, %0, %3                                      \n\
-        adc     %0, %0, #0                                      \n\
-        adds    %0, %0, %0, lsl #16                             \n\
-        addcs   %0, %0, #0x10000                                \n\
-        mvn     %0, %0                                          \n\
-        mov     %0, %0, lsr #16"
+        adc     %0, %0, #0"
         : "=r" (sum), "=r" (iph), "=r" (ihl), "=r" (tmp1)
         : "1" (iph), "2" (ihl)
         : "cc", "memory");
-        return (__force __sum16)sum;
-}
-
-/*
- *      Fold a partial checksum without adding pseudo headers
- */
-static inline __sum16 csum_fold(__wsum sum)
-{
-        __asm__(
-        "adds   %0, %1, %1, lsl #16     @ csum_fold             \n\
-        addcs   %0, %0, #0x10000"
-        : "=r" (sum)
-        : "r" (sum)
-        : "cc");
-        return (__force __sum16)(~(__force u32)sum >> 16);
+        return csum_fold(sum);
 }
 
 static inline __wsum
@@ -114,23 +110,7 @@ static inline __sum16
 csum_tcpudp_magic(__be32 saddr, __be32 daddr, unsigned short len,
                   unsigned short proto, __wsum sum)
 {
-        __asm__(
-        "adds   %0, %1, %2              @ csum_tcpudp_magic     \n\
-        adcs    %0, %0, %3                                      \n"
-#ifdef __ARMEB__
-        "adcs   %0, %0, %4                                      \n"
-#else
-        "adcs   %0, %0, %4, lsl #8                              \n"
-#endif
-        "adcs   %0, %0, %5                                      \n\
-        adc     %0, %0, #0                                      \n\
-        adds    %0, %0, %0, lsl #16                             \n\
-        addcs   %0, %0, #0x10000                                \n\
-        mvn     %0, %0"
-        : "=&r"(sum)
-        : "r" (sum), "r" (daddr), "r" (saddr), "r" (len), "Ir" (htons(proto))
-        : "cc");
-        return (__force __sum16)((__force u32)sum >> 16);
+        return csum_fold(csum_tcpudp_nofold(saddr, daddr, len, proto, sum));
 }