6 files changed, 16 insertions, 184 deletions

diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig
index 2914b036d76e..2fe2d633fe08 100644
--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@@ -40,6 +40,9 @@ config GENERIC_CALIBRATE_DELAY
 config GENERIC_IOMAP
         def_bool MMU
 
+config GENERIC_CSUM
+        bool
+
 config TIME_LOW_RES
         bool
         default y
diff --git a/arch/m68k/Kconfig.cpu b/arch/m68k/Kconfig.cpu
index 9af9e68c303b..17d37ed57f3c 100644
--- a/arch/m68k/Kconfig.cpu
+++ b/arch/m68k/Kconfig.cpu
@@ -3,6 +3,7 @@ comment "Processor Type"
 config M68000
         bool
         select CPU_HAS_NO_BITFIELDS
+        select GENERIC_CSUM
         help
           The Freescale (was Motorola) 68000 CPU is the first generation of
           the well known M68K family of processors. The CPU core as well as
@@ -23,6 +24,7 @@ config COLDFIRE
         select GENERIC_GPIO
         select ARCH_REQUIRE_GPIOLIB
         select CPU_HAS_NO_BITFIELDS
+        select GENERIC_CSUM
         help
           The Freescale ColdFire family of processors is a modern derivitive
           of the 68000 processor family. They are mainly targeted at embedded
diff --git a/arch/m68k/include/asm/checksum.h b/arch/m68k/include/asm/checksum.h
index ec514485c8b6..2f88d867c711 100644
--- a/arch/m68k/include/asm/checksum.h
+++ b/arch/m68k/include/asm/checksum.h
@@ -3,6 +3,10 @@
 
 #include <linux/in6.h>
 
+#ifdef CONFIG_GENERIC_CSUM
+#include <asm-generic/checksum.h>
+#else
+
 /*
  * computes the checksum of a memory block at buff, length len,
  * and adds in "sum" (32-bit)
@@ -34,30 +38,6 @@ extern __wsum csum_partial_copy_nocheck(const void *src,
                                               void *dst, int len,
                                               __wsum sum);
 
-
-#ifdef CONFIG_COLDFIRE
-
-/*
- *      The ColdFire cores don't support all the 68k instructions used
- *      in the optimized checksum code below. So it reverts back to using
- *      more standard C coded checksums. The fast checksum code is
- *      significantly larger than the optimized version, so it is not
- *      inlined here.
- */
-__sum16 ip_fast_csum(const void *iph, unsigned int ihl);
-
-static inline __sum16 csum_fold(__wsum sum)
-{
-        unsigned int tmp = (__force u32)sum;
-
-        tmp = (tmp & 0xffff) + (tmp >> 16);
-        tmp = (tmp & 0xffff) + (tmp >> 16);
-
-        return (__force __sum16)~tmp;
-}
-
-#else
-
 /*
  *      This is a version of ip_fast_csum() optimized for IP headers,
  *      which always checksum on 4 octet boundaries.
@@ -97,8 +77,6 @@ static inline __sum16 csum_fold(__wsum sum)
         return (__force __sum16)~sum;
 }
 
-#endif /* CONFIG_COLDFIRE */
-
 static inline __wsum
 csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len,
                   unsigned short proto, __wsum sum)
@@ -167,4 +145,5 @@ csum_ipv6_magic(const struct in6_addr *saddr, const struct in6_addr *daddr,
         return csum_fold(sum);
 }
 
+#endif /* CONFIG_GENERIC_CSUM */
 #endif /* _M68K_CHECKSUM_H */
diff --git a/arch/m68k/lib/Makefile b/arch/m68k/lib/Makefile
index 1a1bd9067e90..b3b40e4ed339 100644
--- a/arch/m68k/lib/Makefile
+++ b/arch/m68k/lib/Makefile
@@ -7,8 +7,12 @@ lib-y	:= ashldi3.o ashrdi3.o lshrdi3.o muldi3.o \
            memcpy.o memset.o memmove.o
 
 ifdef CONFIG_MMU
-lib-y   += string.o uaccess.o checksum_mm.o
+lib-y   += string.o uaccess.o
 else
-lib-y   += mulsi3.o divsi3.o udivsi3.o modsi3.o umodsi3.o checksum_no.o
+lib-y   += mulsi3.o divsi3.o udivsi3.o modsi3.o umodsi3.o
+endif
+
+ifndef CONFIG_GENERIC_CSUM
+lib-y   += checksum.o
 endif
 
diff --git a/arch/m68k/lib/checksum_mm.c b/arch/m68k/lib/checksum.c
index 6216f12a756b..6216f12a756b 100644
--- a/arch/m68k/lib/checksum_mm.c
+++ b/arch/m68k/lib/checksum.c
diff --git a/arch/m68k/lib/checksum_no.c b/arch/m68k/lib/checksum_no.c
deleted file mode 100644
index e4c6354da765..000000000000
--- a/arch/m68k/lib/checksum_no.c
+++ /dev/null
@@ -1,156 +0,0 @@
-/*
- * INET         An implementation of the TCP/IP protocol suite for the LINUX
- *              operating system.  INET is implemented using the  BSD Socket
- *              interface as the means of communication with the user level.
- *
- *              IP/TCP/UDP checksumming routines
- *
- * Authors:     Jorge Cwik, <jorge@laser.satlink.net>
- *              Arnt Gulbrandsen, <agulbra@nvg.unit.no>
- *              Tom May, <ftom@netcom.com>
- *              Andreas Schwab, <schwab@issan.informatik.uni-dortmund.de>
- *              Lots of code moved from tcp.c and ip.c; see those files
- *              for more names.
- *
- * 03/02/96     Jes Sorensen, Andreas Schwab, Roman Hodek:
- *              Fixed some nasty bugs, causing some horrible crashes.
- *              A: At some points, the sum (%0) was used as
- *              length-counter instead of the length counter
- *              (%1). Thanks to Roman Hodek for pointing this out.
- *              B: GCC seems to mess up if one uses too many
- *              data-registers to hold input values and one tries to
- *              specify d0 and d1 as scratch registers. Letting gcc choose these
- *      registers itself solves the problem.
- *
- *              This program is free software; you can redistribute it and/or
- *              modify it under the terms of the GNU General Public License
- *              as published by the Free Software Foundation; either version
- *              2 of the License, or (at your option) any later version.
- */
- 
-/* Revised by Kenneth Albanowski for m68knommu. Basic problem: unaligned access kills, so most
-   of the assembly has to go. */
-
-#include <linux/module.h>
-#include <net/checksum.h>
-
-static inline unsigned short from32to16(unsigned long x)
-{
-        /* add up 16-bit and 16-bit for 16+c bit */
-        x = (x & 0xffff) + (x >> 16);
-        /* add up carry.. */
-        x = (x & 0xffff) + (x >> 16);
-        return x;
-}
-
-static unsigned long do_csum(const unsigned char * buff, int len)
-{
-        int odd, count;
-        unsigned long result = 0;
-
-        if (len <= 0)
-                goto out;
-        odd = 1 & (unsigned long) buff;
-        if (odd) {
-                result = *buff;
-                len--;
-                buff++;
-        }
-        count = len >> 1;               /* nr of 16-bit words.. */
-        if (count) {
-                if (2 & (unsigned long) buff) {
-                        result += *(unsigned short *) buff;
-                        count--;
-                        len -= 2;
-                        buff += 2;
-                }
-                count >>= 1;            /* nr of 32-bit words.. */
-                if (count) {
-                        unsigned long carry = 0;
-                        do {
-                                unsigned long w = *(unsigned long *) buff;
-                                count--;
-                                buff += 4;
-                                result += carry;
-                                result += w;
-                                carry = (w > result);
-                        } while (count);
-                        result += carry;
-                        result = (result & 0xffff) + (result >> 16);
-                }
-                if (len & 2) {
-                        result += *(unsigned short *) buff;
-                        buff += 2;
-                }
-        }
-        if (len & 1)
-                result += (*buff << 8);
-        result = from32to16(result);
-        if (odd)
-                result = ((result >> 8) & 0xff) | ((result & 0xff) << 8);
-out:
-        return result;
-}
-
-#ifdef CONFIG_COLDFIRE
-/*
- *      This is a version of ip_compute_csum() optimized for IP headers,
- *      which always checksum on 4 octet boundaries.
- */
-__sum16 ip_fast_csum(const void *iph, unsigned int ihl)
-{
-        return (__force __sum16)~do_csum(iph,ihl*4);
-}
-EXPORT_SYMBOL(ip_fast_csum);
-#endif
-
-/*
- * computes the checksum of a memory block at buff, length len,
- * and adds in "sum" (32-bit)
- *
- * returns a 32-bit number suitable for feeding into itself
- * or csum_tcpudp_magic
- *
- * this function must be called with even lengths, except
- * for the last fragment, which may be odd
- *
- * it's best to have buff aligned on a 32-bit boundary
- */
-__wsum csum_partial(const void *buff, int len, __wsum sum)
-{
-        unsigned int result = do_csum(buff, len);
-
-        /* add in old sum, and carry.. */
-        result += (__force u32)sum;
-        if ((__force u32)sum > result)
-                result += 1;
-        return (__force __wsum)result;
-}
-
-EXPORT_SYMBOL(csum_partial);
-
-/*
- * copy from fs while checksumming, otherwise like csum_partial
- */
-
-__wsum
-csum_partial_copy_from_user(const void __user *src, void *dst,
-                            int len, __wsum sum, int *csum_err)
-{
-        if (csum_err) *csum_err = 0;
-        memcpy(dst, (__force const void *)src, len);
-        return csum_partial(dst, len, sum);
-}
-EXPORT_SYMBOL(csum_partial_copy_from_user);
-
-/*
- * copy from ds while checksumming, otherwise like csum_partial
- */
-
-__wsum
-csum_partial_copy_nocheck(const void *src, void *dst, int len, __wsum sum)
-{
-        memcpy(dst, src, len);
-        return csum_partial(dst, len, sum);
-}
-EXPORT_SYMBOL(csum_partial_copy_nocheck);