add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/ia64/lib/csum_partial_copy.c
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@@ -12,7 +12,7 @@
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 #include <linux/types.h>
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 #include <linux/string.h>
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-#include <linux/uaccess.h>
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+#include <net/checksum.h>
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 /*
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  * XXX Fixme: those 2 inlines are meant for debugging and will go away
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@@ -96,46 +96,3 @@
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 out:
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 	return result;
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 }
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-
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-/*
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- * XXX Fixme
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- *
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- * This is very ugly but temporary. THIS NEEDS SERIOUS ENHANCEMENTS.
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- * But it's very tricky to get right even in C.
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- */
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-extern unsigned long do_csum(const unsigned char *, long);
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-
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-__wsum
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-csum_partial_copy_from_user(const void __user *src, void *dst,
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-				int len, __wsum psum, int *errp)
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-{
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-	unsigned long result;
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-
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-	/* XXX Fixme
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-	 * for now we separate the copy from checksum for obvious
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-	 * alignment difficulties. Look at the Alpha code and you'll be
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-	 * scared.
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-	 */
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-
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-	if (__copy_from_user(dst, src, len) != 0 && errp)
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-		*errp = -EFAULT;
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-
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-	result = do_csum(dst, len);
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-
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-	/* add in old sum, and carry.. */
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-	result += (__force u32)psum;
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-	/* 32+c bits -> 32 bits */
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-	result = (result & 0xffffffff) + (result >> 32);
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-	return (__force __wsum)result;
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-}
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-
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-EXPORT_SYMBOL(csum_partial_copy_from_user);
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-
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-__wsum
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-csum_partial_copy_nocheck(const void *src, void *dst, int len, __wsum sum)
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-{
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-	return csum_partial_copy_from_user((__force const void __user *)src,
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-					   dst, len, sum, NULL);
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-}
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-
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-EXPORT_SYMBOL(csum_partial_copy_nocheck);