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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/kernel/configs.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * kernel/configs.c
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  * Echo the kernel .config file used to build the kernel
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@@ -6,21 +7,6 @@
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  * Copyright (C) 2002 Randy Dunlap <rdunlap@xenotime.net>
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  * Copyright (C) 2002 Al Stone <ahs3@fc.hp.com>
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  * Copyright (C) 2002 Hewlett-Packard Company
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
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- * the Free Software Foundation; either version 2 of the License, or (at
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- * your option) any later version.
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- *
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- * This program is distributed in the hope that it will be useful, but
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- * WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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- * NON INFRINGEMENT.  See the GNU General Public License for more
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- * details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program; if not, write to the Free Software
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- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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  */
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 #include <linux/kernel.h>
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@@ -30,43 +16,40 @@
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 #include <linux/init.h>
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 #include <linux/uaccess.h>
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-/**************************************************/
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-/* the actual current config file                 */
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-
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 /*
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- * Define kernel_config_data and kernel_config_data_size, which contains the
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- * wrapped and compressed configuration file.  The file is first compressed
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- * with gzip and then bounded by two eight byte magic numbers to allow
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- * extraction from a binary kernel image:
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- *
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- *   IKCFG_ST
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- *   <image>
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- *   IKCFG_ED
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+ * "IKCFG_ST" and "IKCFG_ED" are used to extract the config data from
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+ * a binary kernel image or a module. See scripts/extract-ikconfig.
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  */
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-#define MAGIC_START	"IKCFG_ST"
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-#define MAGIC_END	"IKCFG_ED"
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-#include "config_data.h"
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-
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-
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-#define MAGIC_SIZE (sizeof(MAGIC_START) - 1)
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-#define kernel_config_data_size \
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-	(sizeof(kernel_config_data) - 1 - MAGIC_SIZE * 2)
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+asm (
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+"	.pushsection .rodata, \"a\"		\n"
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+"	.ascii \"IKCFG_ST\"			\n"
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+"	.global kernel_config_data		\n"
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+"kernel_config_data:				\n"
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+"	.incbin \"kernel/config_data.gz\"	\n"
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+"	.global kernel_config_data_end		\n"
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+"kernel_config_data_end:			\n"
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+"	.ascii \"IKCFG_ED\"			\n"
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+"	.popsection				\n"
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+);
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 #ifdef CONFIG_IKCONFIG_PROC
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+
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+extern char kernel_config_data;
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+extern char kernel_config_data_end;
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39
 
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 static ssize_t
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 ikconfig_read_current(struct file *file, char __user *buf,
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 		      size_t len, loff_t * offset)
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 {
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 	return simple_read_from_buffer(buf, len, offset,
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-				       kernel_config_data + MAGIC_SIZE,
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-				       kernel_config_data_size);
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+				       &kernel_config_data,
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+				       &kernel_config_data_end -
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+				       &kernel_config_data);
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 }
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-static const struct file_operations ikconfig_file_ops = {
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-	.owner = THIS_MODULE,
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-	.read = ikconfig_read_current,
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-	.llseek = default_llseek,
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+static const struct proc_ops config_gz_proc_ops = {
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+	.proc_read	= ikconfig_read_current,
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+	.proc_lseek	= default_llseek,
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 };
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 static int __init ikconfig_init(void)
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 	/* create the current config file */
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 	entry = proc_create("config.gz", S_IFREG | S_IRUGO, NULL,
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-			    &ikconfig_file_ops);
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+			    &config_gz_proc_ops);
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 	if (!entry)
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 		return -ENOMEM;
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-	proc_set_size(entry, kernel_config_data_size);
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+	proc_set_size(entry, &kernel_config_data_end - &kernel_config_data);
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 	return 0;
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 }