summaryrefslogtreecommitdiff
path: root/kernel/configs.c
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/configs.c')
-rw-r--r--kernel/configs.c42
1 files changed, 20 insertions, 22 deletions
diff --git a/kernel/configs.c b/kernel/configs.c
index 2df132b20217..b062425ccf8d 100644
--- a/kernel/configs.c
+++ b/kernel/configs.c
@@ -30,37 +30,35 @@
#include <linux/init.h>
#include <linux/uaccess.h>
-/**************************************************/
-/* the actual current config file */
-
/*
- * Define kernel_config_data and kernel_config_data_size, which contains the
- * wrapped and compressed configuration file. The file is first compressed
- * with gzip and then bounded by two eight byte magic numbers to allow
- * extraction from a binary kernel image:
- *
- * IKCFG_ST
- * <image>
- * IKCFG_ED
+ * "IKCFG_ST" and "IKCFG_ED" are used to extract the config data from
+ * a binary kernel image or a module. See scripts/extract-ikconfig.
*/
-#define MAGIC_START "IKCFG_ST"
-#define MAGIC_END "IKCFG_ED"
-#include "config_data.h"
-
-
-#define MAGIC_SIZE (sizeof(MAGIC_START) - 1)
-#define kernel_config_data_size \
- (sizeof(kernel_config_data) - 1 - MAGIC_SIZE * 2)
+asm (
+" .pushsection .rodata, \"a\" \n"
+" .ascii \"IKCFG_ST\" \n"
+" .global kernel_config_data \n"
+"kernel_config_data: \n"
+" .incbin \"kernel/config_data.gz\" \n"
+" .global kernel_config_data_end \n"
+"kernel_config_data_end: \n"
+" .ascii \"IKCFG_ED\" \n"
+" .popsection \n"
+);
#ifdef CONFIG_IKCONFIG_PROC
+extern char kernel_config_data;
+extern char kernel_config_data_end;
+
static ssize_t
ikconfig_read_current(struct file *file, char __user *buf,
size_t len, loff_t * offset)
{
return simple_read_from_buffer(buf, len, offset,
- kernel_config_data + MAGIC_SIZE,
- kernel_config_data_size);
+ &kernel_config_data,
+ &kernel_config_data_end -
+ &kernel_config_data);
}
static const struct file_operations ikconfig_file_ops = {
@@ -79,7 +77,7 @@ static int __init ikconfig_init(void)
if (!entry)
return -ENOMEM;
- proc_set_size(entry, kernel_config_data_size);
+ proc_set_size(entry, &kernel_config_data_end - &kernel_config_data);
return 0;
}