add boot partition size

hc

2023-12-11 d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d

 kernel/kernel/configs.c
..
..
@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
1
2
 /*
2
3
  * kernel/configs.c
3
4
  * Echo the kernel .config file used to build the kernel
..
..
@@ -6,21 +7,6 @@
6
7
  * Copyright (C) 2002 Randy Dunlap <rdunlap@xenotime.net>
7
8
  * Copyright (C) 2002 Al Stone <ahs3@fc.hp.com>
8
9
  * Copyright (C) 2002 Hewlett-Packard Company
9
- *
10
- * This program is free software; you can redistribute it and/or modify
11
- * it under the terms of the GNU General Public License as published by
12
- * the Free Software Foundation; either version 2 of the License, or (at
13
- * your option) any later version.
14
- *
15
- * This program is distributed in the hope that it will be useful, but
16
- * WITHOUT ANY WARRANTY; without even the implied warranty of
17
- * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
18
- * NON INFRINGEMENT.  See the GNU General Public License for more
19
- * details.
20
- *
21
- * You should have received a copy of the GNU General Public License
22
- * along with this program; if not, write to the Free Software
23
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24
10
  */
25
11
 
26
12
 #include <linux/kernel.h>
..
..
@@ -30,43 +16,40 @@
30
16
 #include <linux/init.h>
31
17
 #include <linux/uaccess.h>
32
18
 
33
-/**************************************************/
34
-/* the actual current config file                 */
35
-
36
19
 /*
37
- * Define kernel_config_data and kernel_config_data_size, which contains the
38
- * wrapped and compressed configuration file.  The file is first compressed
39
- * with gzip and then bounded by two eight byte magic numbers to allow
40
- * extraction from a binary kernel image:
41
- *
42
- *   IKCFG_ST
43
- *   <image>
44
- *   IKCFG_ED
20
+ * "IKCFG_ST" and "IKCFG_ED" are used to extract the config data from
21
+ * a binary kernel image or a module. See scripts/extract-ikconfig.
45
22
  */
46
-#define MAGIC_START	"IKCFG_ST"
47
-#define MAGIC_END	"IKCFG_ED"
48
-#include "config_data.h"
49
-
50
-
51
-#define MAGIC_SIZE (sizeof(MAGIC_START) - 1)
52
-#define kernel_config_data_size \
53
-	(sizeof(kernel_config_data) - 1 - MAGIC_SIZE * 2)
23
+asm (
24
+"	.pushsection .rodata, \"a\"		\n"
25
+"	.ascii \"IKCFG_ST\"			\n"
26
+"	.global kernel_config_data		\n"
27
+"kernel_config_data:				\n"
28
+"	.incbin \"kernel/config_data.gz\"	\n"
29
+"	.global kernel_config_data_end		\n"
30
+"kernel_config_data_end:			\n"
31
+"	.ascii \"IKCFG_ED\"			\n"
32
+"	.popsection				\n"
33
+);
54
34
 
55
35
 #ifdef CONFIG_IKCONFIG_PROC
36
+
37
+extern char kernel_config_data;
38
+extern char kernel_config_data_end;
56
39
 
57
40
 static ssize_t
58
41
 ikconfig_read_current(struct file *file, char __user *buf,
59
42
 		      size_t len, loff_t * offset)
60
43
 {
61
44
 	return simple_read_from_buffer(buf, len, offset,
62
-				       kernel_config_data + MAGIC_SIZE,
63
-				       kernel_config_data_size);
45
+				       &kernel_config_data,
46
+				       &kernel_config_data_end -
47
+				       &kernel_config_data);
64
48
 }
65
49
 
66
-static const struct file_operations ikconfig_file_ops = {
67
-	.owner = THIS_MODULE,
68
-	.read = ikconfig_read_current,
69
-	.llseek = default_llseek,
50
+static const struct proc_ops config_gz_proc_ops = {
51
+	.proc_read	= ikconfig_read_current,
52
+	.proc_lseek	= default_llseek,
70
53
 };
71
54
 
72
55
 static int __init ikconfig_init(void)
..
..
@@ -75,11 +58,11 @@
75
58
 
76
59
 	/* create the current config file */
77
60
 	entry = proc_create("config.gz", S_IFREG | S_IRUGO, NULL,
78
-			    &ikconfig_file_ops);
61
+			    &config_gz_proc_ops);
79
62
 	if (!entry)
80
63
 		return -ENOMEM;
81
64
 
82
-	proc_set_size(entry, kernel_config_data_size);
65
+	proc_set_size(entry, &kernel_config_data_end - &kernel_config_data);
83
66
 
84
67
 	return 0;
85
68
 }