修改4g拨号为QMI,需要在系统里后台执行quectel-CM

hc

2024-10-22 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5

 kernel/arch/um/kernel/maccess.c
..
..
@@ -1,24 +1,19 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
1
2
 /*
2
3
  * Copyright (C) 2013 Richard Weinberger <richrd@nod.at>
3
- *
4
- * This program is free software; you can redistribute it and/or modify
5
- * it under the terms of the GNU General Public License version 2 as
6
- * published by the Free Software Foundation.
7
4
  */
8
5
 
9
6
 #include <linux/uaccess.h>
10
7
 #include <linux/kernel.h>
11
8
 #include <os.h>
12
9
 
13
-long probe_kernel_read(void *dst, const void *src, size_t size)
10
+bool copy_from_kernel_nofault_allowed(const void *src, size_t size)
14
11
 {
15
12
 	void *psrc = (void *)rounddown((unsigned long)src, PAGE_SIZE);
16
13
 
17
14
 	if ((unsigned long)src < PAGE_SIZE || size <= 0)
18
-		return -EFAULT;
19
-
15
+		return false;
20
16
 	if (os_mincore(psrc, size + src - psrc) <= 0)
21
-		return -EFAULT;
22
-
23
-	return __probe_kernel_read(dst, src, size);
17
+		return false;
18
+	return true;
24
19
 }