x86_64: prepare shared lib/csum-wrappers.c

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 0 insertions, 135 deletions

diff --git a/arch/x86_64/lib/csum-wrappers.c b/arch/x86_64/lib/csum-wrappers.c
deleted file mode 100644
index fd42a4a095fc..000000000000
--- a/arch/x86_64/lib/csum-wrappers.c
+++ /dev/null
@@ -1,135 +0,0 @@
-/* Copyright 2002,2003 Andi Kleen, SuSE Labs.
- * Subject to the GNU Public License v.2
- * 
- * Wrappers of assembly checksum functions for x86-64.
- */
-
-#include <asm/checksum.h>
-#include <linux/module.h>
-
-/** 
- * csum_partial_copy_from_user - Copy and checksum from user space. 
- * @src: source address (user space) 
- * @dst: destination address
- * @len: number of bytes to be copied.
- * @isum: initial sum that is added into the result (32bit unfolded)
- * @errp: set to -EFAULT for an bad source address.
- * 
- * Returns an 32bit unfolded checksum of the buffer.
- * src and dst are best aligned to 64bits. 
- */ 
-__wsum
-csum_partial_copy_from_user(const void __user *src, void *dst,
-			    int len, __wsum isum, int *errp)
-{ 
-	might_sleep();
-	*errp = 0;
-	if (likely(access_ok(VERIFY_READ,src, len))) { 
-		/* Why 6, not 7? To handle odd addresses aligned we
-		   would need to do considerable complications to fix the
-		   checksum which is defined as an 16bit accumulator. The
-		   fix alignment code is primarily for performance
-		   compatibility with 32bit and that will handle odd
-		   addresses slowly too. */
-		if (unlikely((unsigned long)src & 6)) {			
-			while (((unsigned long)src & 6) && len >= 2) { 
-				__u16 val16;			
-				*errp = __get_user(val16, (const __u16 __user *)src);
-				if (*errp)
-					return isum;
-				*(__u16 *)dst = val16;
-				isum = (__force __wsum)add32_with_carry(
-						(__force unsigned)isum, val16);
-				src += 2; 
-				dst += 2; 
-				len -= 2;
-			}
-		}
-		isum = csum_partial_copy_generic((__force const void *)src,
-					dst, len, isum, errp, NULL);
-		if (likely(*errp == 0)) 
-			return isum;
-	} 
-	*errp = -EFAULT;
-	memset(dst,0,len); 
-	return isum;		
-} 
-
-EXPORT_SYMBOL(csum_partial_copy_from_user);
-
-/** 
- * csum_partial_copy_to_user - Copy and checksum to user space. 
- * @src: source address
- * @dst: destination address (user space)
- * @len: number of bytes to be copied.
- * @isum: initial sum that is added into the result (32bit unfolded)
- * @errp: set to -EFAULT for an bad destination address.
- * 
- * Returns an 32bit unfolded checksum of the buffer.
- * src and dst are best aligned to 64bits.
- */ 
-__wsum
-csum_partial_copy_to_user(const void *src, void __user *dst,
-			  int len, __wsum isum, int *errp)
-{ 
-	might_sleep();
-	if (unlikely(!access_ok(VERIFY_WRITE, dst, len))) {
-		*errp = -EFAULT;
-		return 0; 
-	}
-
-	if (unlikely((unsigned long)dst & 6)) {
-		while (((unsigned long)dst & 6) && len >= 2) { 
-			__u16 val16 = *(__u16 *)src;
-			isum = (__force __wsum)add32_with_carry(
-					(__force unsigned)isum, val16);
-			*errp = __put_user(val16, (__u16 __user *)dst);
-			if (*errp)
-				return isum;
-			src += 2; 
-			dst += 2; 
-			len -= 2;
-		}
-	}
-
-	*errp = 0;
-	return csum_partial_copy_generic(src, (void __force *)dst,len,isum,NULL,errp); 
-} 
-
-EXPORT_SYMBOL(csum_partial_copy_to_user);
-
-/** 
- * csum_partial_copy_nocheck - Copy and checksum.
- * @src: source address
- * @dst: destination address
- * @len: number of bytes to be copied.
- * @isum: initial sum that is added into the result (32bit unfolded)
- * 
- * Returns an 32bit unfolded checksum of the buffer.
- */ 
-__wsum
-csum_partial_copy_nocheck(const void *src, void *dst, int len, __wsum sum)
-{ 
-	return csum_partial_copy_generic(src,dst,len,sum,NULL,NULL);
-} 
-EXPORT_SYMBOL(csum_partial_copy_nocheck);
-
-__sum16 csum_ipv6_magic(const struct in6_addr *saddr,
-			const struct in6_addr *daddr,
-			__u32 len, unsigned short proto, __wsum sum)
-{
-	__u64 rest, sum64;
-     
-	rest = (__force __u64)htonl(len) + (__force __u64)htons(proto) +
-		(__force __u64)sum;
-	asm("  addq (%[saddr]),%[sum]\n"
-	    "  adcq 8(%[saddr]),%[sum]\n"
-	    "  adcq (%[daddr]),%[sum]\n" 
-	    "  adcq 8(%[daddr]),%[sum]\n"
-	    "  adcq $0,%[sum]\n"
-	    : [sum] "=r" (sum64) 
-	    : "[sum]" (rest),[saddr] "r" (saddr), [daddr] "r" (daddr));
-	return csum_fold((__force __wsum)add32_with_carry(sum64 & 0xffffffff, sum64>>32));
-}
-
-EXPORT_SYMBOL(csum_ipv6_magic);