change system file

hc

2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771

 kernel/lib/strnlen_user.c
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@@ -3,15 +3,9 @@
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 #include <linux/export.h>
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 #include <linux/uaccess.h>
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 #include <linux/mm.h>
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+#include <linux/bitops.h>
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 #include <asm/word-at-a-time.h>
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-
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-/* Set bits in the first 'n' bytes when loaded from memory */
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-#ifdef __LITTLE_ENDIAN
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-#  define aligned_byte_mask(n) ((1ul << 8*(n))-1)
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-#else
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-#  define aligned_byte_mask(n) (~0xfful << (BITS_PER_LONG - 8 - 8*(n)))
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-#endif
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 /*
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  * Do a strnlen, return length of string *with* final '\0'.
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@@ -115,9 +109,9 @@
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 		if (max > count)
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 			max = count;
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-		if (user_access_begin(VERIFY_READ, str, max)) {
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+		if (user_read_access_begin(str, max)) {
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 			retval = do_strnlen_user(str, count, max);
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-			user_access_end();
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+			user_read_access_end();
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 			return retval;
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 		}
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 	}