[PATCH] Dynamic kernel command-line: x86_64

1. Rename saved_command_line into boot_command_line.
2. Set command_line as __initdata.

Signed-off-by: Alon Bar-Lev <[e-mail]>
Cc: Andi Kleen <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

arch/x86_64/kernel/head64.c

···
 #define OLD_CL_BASE_ADDR        0x90000
 #define OLD_CL_OFFSET           0x90022
 
-extern char saved_command_line[];
+extern char __initdata boot_command_line[];
 
 static void __init copy_bootdata(char *real_mode_data)
 {
···
 		new_data = OLD_CL_BASE_ADDR + * (u16 *) OLD_CL_OFFSET;
 	}
 	command_line = (char *) ((u64)(new_data));
-	memcpy(saved_command_line, command_line, COMMAND_LINE_SIZE);
+	memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
 }
 
 void __init x86_64_start_kernel(char * real_mode_data)

arch/x86_64/kernel/setup.c

···
 
 extern int root_mountflags;
 
-char command_line[COMMAND_LINE_SIZE];
+char __initdata command_line[COMMAND_LINE_SIZE];
 
 struct resource standard_io_resources[] = {
 	{ .name = "dma1", .start = 0x00, .end = 0x1f,
···
 
 void __init setup_arch(char **cmdline_p)
 {
-	printk(KERN_INFO "Command line: %s\n", saved_command_line);
+	printk(KERN_INFO "Command line: %s\n", boot_command_line);
 
  	ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
  	screen_info = SCREEN_INFO;
···
 
 	early_identify_cpu(&boot_cpu_data);
 
-	strlcpy(command_line, saved_command_line, COMMAND_LINE_SIZE);
+	strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
 	*cmdline_p = command_line;
 
 	parse_early_param();

include/asm-x86_64/bootsetup.h

···
 #define EDD_MBR_SIG_NR (*(unsigned char *) (PARAM+EDD_MBR_SIG_NR_BUF))
 #define EDD_MBR_SIGNATURE ((unsigned int *) (PARAM+EDD_MBR_SIG_BUF))
 #define EDD_BUF     ((struct edd_info *) (PARAM+EDDBUF))
-#define COMMAND_LINE saved_command_line
+#define COMMAND_LINE boot_command_line
 
 #define RAMDISK_IMAGE_START_MASK  	0x07FF
 #define RAMDISK_PROMPT_FLAG		0x8000