add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/xtensa/include/asm/checksum.h
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@@ -13,7 +13,7 @@
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 #include <linux/in6.h>
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 #include <linux/uaccess.h>
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-#include <variant/core.h>
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+#include <asm/core.h>
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 /*
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  * computes the checksum of a memory block at buff, length len,
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@@ -37,29 +37,27 @@
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  * better 64-bit) boundary
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  */
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-asmlinkage __wsum csum_partial_copy_generic(const void *src, void *dst,
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-					    int len, __wsum sum,
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-					    int *src_err_ptr, int *dst_err_ptr);
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+asmlinkage __wsum csum_partial_copy_generic(const void *src, void *dst, int len);
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+#define _HAVE_ARCH_CSUM_AND_COPY
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 /*
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  *	Note: when you get a NULL pointer exception here this means someone
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  *	passed in an incorrect kernel address to one of these functions.
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- *
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- *	If you use these functions directly please don't forget the access_ok().
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  */
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 static inline
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-__wsum csum_partial_copy_nocheck(const void *src, void *dst,
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-					int len, __wsum sum)
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+__wsum csum_partial_copy_nocheck(const void *src, void *dst, int len)
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 {
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-	return csum_partial_copy_generic(src, dst, len, sum, NULL, NULL);
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+	return csum_partial_copy_generic(src, dst, len);
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 }
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+#define _HAVE_ARCH_COPY_AND_CSUM_FROM_USER
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 static inline
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-__wsum csum_partial_copy_from_user(const void __user *src, void *dst,
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-				   int len, __wsum sum, int *err_ptr)
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+__wsum csum_and_copy_from_user(const void __user *src, void *dst,
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+				   int len)
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 {
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-	return csum_partial_copy_generic((__force const void *)src, dst,
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-					len, sum, err_ptr, NULL);
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+	if (!access_ok(src, len))
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+		return 0;
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+	return csum_partial_copy_generic((__force const void *)src, dst, len);
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 }
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 /*
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@@ -240,15 +238,10 @@
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  */
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 #define HAVE_CSUM_COPY_USER
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 static __inline__ __wsum csum_and_copy_to_user(const void *src,
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-					       void __user *dst, int len,
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-					       __wsum sum, int *err_ptr)
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+					       void __user *dst, int len)
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 {
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-	if (access_ok(VERIFY_WRITE, dst, len))
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-		return csum_partial_copy_generic(src,dst,len,sum,NULL,err_ptr);
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-
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-	if (len)
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-		*err_ptr = -EFAULT;
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-
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-	return (__force __wsum)-1; /* invalid checksum */
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+	if (!access_ok(dst, len))
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+		return 0;
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+	return csum_partial_copy_generic(src, (__force void *)dst, len);
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 }
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 #endif