microblaze: use the generic lib/checksum.c

The microblaze checksum code is mostly identical to
the asm-generic+lib version, so use that instead.

Signed-off-by: Remis Lima Baima <remis.developer@googlemail.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>

4 files changed, 6 insertions, 241 deletions

diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index b50b845fdd50..2db722d80d4d 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -53,6 +53,9 @@ config GENERIC_HARDIRQS_NO__DO_IRQ
 config GENERIC_GPIO
         def_bool y
 
+config GENERIC_CSUM
+        def_bool y
+
 config PCI
         def_bool n
 
diff --git a/arch/microblaze/include/asm/checksum.h b/arch/microblaze/include/asm/checksum.h
index 97ea46b5cf80..128bf03b54b7 100644
--- a/arch/microblaze/include/asm/checksum.h
+++ b/arch/microblaze/include/asm/checksum.h
@@ -10,12 +10,11 @@
 #ifndef _ASM_MICROBLAZE_CHECKSUM_H
 #define _ASM_MICROBLAZE_CHECKSUM_H
 
-#include <linux/in6.h>
-
 /*
  * computes the checksum of the TCP/UDP pseudo-header
  * returns a 16-bit checksum, already complemented
  */
+#define csum_tcpudp_nofold      csum_tcpudp_nofold
 static inline __wsum
 csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len,
                    unsigned short proto, __wsum sum)
@@ -30,71 +29,6 @@ csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len,
         return sum;
 }
 
-/*
- * 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
- */
-extern __wsum csum_partial(const void *buff, int len, __wsum sum);
-
-/*
- * the same as csum_partial, but copies from src while it
- * checksums
- *
- * here even more important to align src and dst on a 32-bit (or even
- * better 64-bit) boundary
- */
-extern __wsum csum_partial_copy(const void *src, void *dst, int len,
-                                                                __wsum sum);
-
-/*
- * the same as csum_partial_copy, but copies from user space.
- *
- * here even more important to align src and dst on a 32-bit (or even
- * better 64-bit) boundary
- */
-extern __wsum csum_partial_copy_from_user(const void __user *src, void *dst,
-                                        int len, __wsum sum, int *csum_err);
-
-#define csum_partial_copy_nocheck(src, dst, len, sum)   \
-        csum_partial_copy((src), (dst), (len), (sum))
-
-/*
- *      This is a version of ip_compute_csum() optimized for IP headers,
- *      which always checksum on 4 octet boundaries.
- *
- */
-extern __sum16 ip_fast_csum(const void *iph, unsigned int ihl);
-
-/*
- *      Fold a partial checksum
- */
-static inline __sum16 csum_fold(__wsum csum)
-{
-        u32 sum = (__force u32)csum;
-        sum = (sum & 0xffff) + (sum >> 16);
-        sum = (sum & 0xffff) + (sum >> 16);
-        return (__force __sum16)~sum;
-}
-
-static inline __sum16
-csum_tcpudp_magic(__be32 saddr, __be32 daddr, unsigned short len,
-                  unsigned short proto, __wsum sum)
-{
-        return csum_fold(csum_tcpudp_nofold(saddr, daddr, len, proto, sum));
-}
-
-/*
- * this routine is used for miscellaneous IP-like checksums, mainly
- * in icmp.c
- */
-extern __sum16 ip_compute_csum(const void *buff, int len);
+#include <asm-generic/checksum.h>
 
 #endif /* _ASM_MICROBLAZE_CHECKSUM_H */
diff --git a/arch/microblaze/lib/Makefile b/arch/microblaze/lib/Makefile
index 71c8cb6c9e43..b579db068c06 100644
--- a/arch/microblaze/lib/Makefile
+++ b/arch/microblaze/lib/Makefile
@@ -2,7 +2,7 @@
 # Makefile
 #
 
-lib-y :=  memset.o checksum.o
+lib-y :=  memset.o
 
 ifeq ($(CONFIG_OPT_LIB_ASM),y)
 lib-y += fastcopy.o
diff --git a/arch/microblaze/lib/checksum.c b/arch/microblaze/lib/checksum.c
deleted file mode 100644
index f08e74591418..000000000000
--- a/arch/microblaze/lib/checksum.c
+++ /dev/null
@@ -1,172 +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>
-
-#include <asm/byteorder.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 int 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;
-}
-
-/*
- *      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);
-
-/*
- * 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 wsum)
-{
-        unsigned int sum = (__force unsigned int)wsum;
-        unsigned int result = do_csum(buff, len);
-
-        /* add in old sum, and carry.. */
-        result += sum;
-        if (sum > result)
-                result += 1;
-        return (__force __wsum)result;
-}
-EXPORT_SYMBOL(csum_partial);
-
-/*
- * this routine is used for miscellaneous IP-like checksums, mainly
- * in icmp.c
- */
-__sum16 ip_compute_csum(const void *buff, int len)
-{
-        return (__force __sum16)~do_csum(buff, len);
-}
-EXPORT_SYMBOL(ip_compute_csum);
-
-/*
- * 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)
-{
-        int missing;
-
-        missing = __copy_from_user(dst, src, len);
-        if (missing) {
-                memset(dst + len - missing, 0, missing);
-                *csum_err = -EFAULT;
-        } else
-                *csum_err = 0;
-
-        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(const void *src, void *dst, int len, __wsum sum)
-{
-        memcpy(dst, src, len);
-        return csum_partial(dst, len, sum);
-}
-EXPORT_SYMBOL(csum_partial_copy);