修改led为gpio

hc

2024-10-12 a5969cabbb4660eab42b6ef0412cbbd1200cf14d

 kernel/arch/x86/include/asm/uaccess_64.h
..
..
@@ -47,135 +47,15 @@
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 }
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 static __always_inline __must_check unsigned long
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-copy_to_user_mcsafe(void *to, const void *from, unsigned len)
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-{
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-	unsigned long ret;
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-
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-	__uaccess_begin();
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-	/*
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-	 * Note, __memcpy_mcsafe() is explicitly used since it can
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-	 * handle exceptions / faults.  memcpy_mcsafe() may fall back to
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-	 * memcpy() which lacks this handling.
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-	 */
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-	ret = __memcpy_mcsafe(to, from, len);
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-	__uaccess_end();
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-	return ret;
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-}
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-
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-static __always_inline __must_check unsigned long
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 raw_copy_from_user(void *dst, const void __user *src, unsigned long size)
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 {
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-	int ret = 0;
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-
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-	if (!__builtin_constant_p(size))
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-		return copy_user_generic(dst, (__force void *)src, size);
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-	switch (size) {
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-	case 1:
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-		__uaccess_begin_nospec();
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-		__get_user_asm_nozero(*(u8 *)dst, (u8 __user *)src,
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-			      ret, "b", "b", "=q", 1);
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-		__uaccess_end();
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-		return ret;
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-	case 2:
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-		__uaccess_begin_nospec();
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-		__get_user_asm_nozero(*(u16 *)dst, (u16 __user *)src,
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-			      ret, "w", "w", "=r", 2);
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-		__uaccess_end();
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-		return ret;
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-	case 4:
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-		__uaccess_begin_nospec();
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-		__get_user_asm_nozero(*(u32 *)dst, (u32 __user *)src,
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-			      ret, "l", "k", "=r", 4);
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-		__uaccess_end();
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-		return ret;
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-	case 8:
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-		__uaccess_begin_nospec();
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-		__get_user_asm_nozero(*(u64 *)dst, (u64 __user *)src,
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-			      ret, "q", "", "=r", 8);
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-		__uaccess_end();
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-		return ret;
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-	case 10:
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-		__uaccess_begin_nospec();
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-		__get_user_asm_nozero(*(u64 *)dst, (u64 __user *)src,
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-			       ret, "q", "", "=r", 10);
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-		if (likely(!ret))
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-			__get_user_asm_nozero(*(u16 *)(8 + (char *)dst),
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-				       (u16 __user *)(8 + (char __user *)src),
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-				       ret, "w", "w", "=r", 2);
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-		__uaccess_end();
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-		return ret;
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-	case 16:
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-		__uaccess_begin_nospec();
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-		__get_user_asm_nozero(*(u64 *)dst, (u64 __user *)src,
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-			       ret, "q", "", "=r", 16);
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-		if (likely(!ret))
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-			__get_user_asm_nozero(*(u64 *)(8 + (char *)dst),
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-				       (u64 __user *)(8 + (char __user *)src),
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-				       ret, "q", "", "=r", 8);
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-		__uaccess_end();
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-		return ret;
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-	default:
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-		return copy_user_generic(dst, (__force void *)src, size);
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-	}
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+	return copy_user_generic(dst, (__force void *)src, size);
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 }
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 static __always_inline __must_check unsigned long
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 raw_copy_to_user(void __user *dst, const void *src, unsigned long size)
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 {
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-	int ret = 0;
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-
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-	if (!__builtin_constant_p(size))
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-		return copy_user_generic((__force void *)dst, src, size);
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-	switch (size) {
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-	case 1:
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-		__uaccess_begin();
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-		__put_user_asm(*(u8 *)src, (u8 __user *)dst,
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-			      ret, "b", "b", "iq", 1);
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-		__uaccess_end();
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-		return ret;
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-	case 2:
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-		__uaccess_begin();
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-		__put_user_asm(*(u16 *)src, (u16 __user *)dst,
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-			      ret, "w", "w", "ir", 2);
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-		__uaccess_end();
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-		return ret;
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-	case 4:
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-		__uaccess_begin();
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-		__put_user_asm(*(u32 *)src, (u32 __user *)dst,
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-			      ret, "l", "k", "ir", 4);
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-		__uaccess_end();
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-		return ret;
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-	case 8:
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-		__uaccess_begin();
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-		__put_user_asm(*(u64 *)src, (u64 __user *)dst,
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-			      ret, "q", "", "er", 8);
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-		__uaccess_end();
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-		return ret;
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-	case 10:
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-		__uaccess_begin();
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-		__put_user_asm(*(u64 *)src, (u64 __user *)dst,
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-			       ret, "q", "", "er", 10);
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-		if (likely(!ret)) {
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-			asm("":::"memory");
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-			__put_user_asm(4[(u16 *)src], 4 + (u16 __user *)dst,
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-				       ret, "w", "w", "ir", 2);
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-		}
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-		__uaccess_end();
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-		return ret;
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-	case 16:
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-		__uaccess_begin();
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-		__put_user_asm(*(u64 *)src, (u64 __user *)dst,
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-			       ret, "q", "", "er", 16);
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-		if (likely(!ret)) {
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-			asm("":::"memory");
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-			__put_user_asm(1[(u64 *)src], 1 + (u64 __user *)dst,
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-				       ret, "q", "", "er", 8);
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-		}
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-		__uaccess_end();
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-		return ret;
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-	default:
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-		return copy_user_generic((__force void *)dst, src, size);
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-	}
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+	return copy_user_generic((__force void *)dst, src, size);
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 }
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 static __always_inline __must_check
..
..
@@ -206,11 +86,4 @@
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 	kasan_check_write(dst, size);
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 	return __copy_user_flushcache(dst, src, size);
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 }
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-
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-unsigned long
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-copy_user_handle_tail(char *to, char *from, unsigned len);
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-
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-unsigned long
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-mcsafe_handle_tail(char *to, char *from, unsigned len);
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-
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 #endif /* _ASM_X86_UACCESS_64_H */