From d0a88f193825563e3dbdde0c18606aa4a6d0fa6f Mon Sep 17 00:00:00 2001
From: Alon Bar-Lev <alon.barlev@gmail.com>
Date: Mon, 12 Feb 2007 00:53:52 -0800
Subject: [PATCH] --- yaml --- r: 47998 b: refs/heads/master c:
 30d7e0d466b3ac0b5ef77e4062bf9385f0d72270 h: refs/heads/master v: v3

---
 [refs]                     |  2 +-
 trunk/include/linux/init.h |  5 +++--
 trunk/init/main.c          | 29 ++++++++++++++++++++++++-----
 3 files changed, 28 insertions(+), 8 deletions(-)

diff --git a/[refs] b/[refs]
index 79c2941d1f61..2faa75824266 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: ff91691bccdb741efb2df0489058a4961fa79598
+refs/heads/master: 30d7e0d466b3ac0b5ef77e4062bf9385f0d72270
diff --git a/trunk/include/linux/init.h b/trunk/include/linux/init.h
index c65f5107d512..e290a010e3f2 100644
--- a/trunk/include/linux/init.h
+++ b/trunk/include/linux/init.h
@@ -67,7 +67,8 @@ extern initcall_t __con_initcall_start[], __con_initcall_end[];
 extern initcall_t __security_initcall_start[], __security_initcall_end[];
 
 /* Defined in init/main.c */
-extern char saved_command_line[];
+extern char __initdata boot_command_line[];
+extern char *saved_command_line;
 extern unsigned int reset_devices;
 
 /* used by init/main.c */
@@ -164,7 +165,7 @@ struct obs_kernel_param {
 #define early_param(str, fn)					\
 	__setup_param(str, fn, fn, 1)
 
-/* Relies on saved_command_line being set */
+/* Relies on boot_command_line being set */
 void __init parse_early_param(void);
 #endif /* __ASSEMBLY__ */
 
diff --git a/trunk/init/main.c b/trunk/init/main.c
index 4e88bddfbebf..4e9e92bb2b89 100644
--- a/trunk/init/main.c
+++ b/trunk/init/main.c
@@ -121,8 +121,12 @@ extern void time_init(void);
 void (*late_time_init)(void);
 extern void softirq_init(void);
 
-/* Untouched command line (eg. for /proc) saved by arch-specific code. */
-char saved_command_line[COMMAND_LINE_SIZE];
+/* Untouched command line saved by arch-specific code. */
+char __initdata boot_command_line[COMMAND_LINE_SIZE];
+/* Untouched saved command line (eg. for /proc) */
+char *saved_command_line;
+/* Command line for parameter parsing */
+static char *static_command_line;
 
 static char *execute_command;
 static char *ramdisk_execute_command;
@@ -399,6 +403,20 @@ static void __init smp_init(void)
 
 #endif
 
+/*
+ * We need to store the untouched command line for future reference.
+ * We also need to store the touched command line since the parameter
+ * parsing is performed in place, and we should allow a component to
+ * store reference of name/value for future reference.
+ */
+static void __init setup_command_line(char *command_line)
+{
+	saved_command_line = alloc_bootmem(strlen (boot_command_line)+1);
+	static_command_line = alloc_bootmem(strlen (command_line)+1);
+	strcpy (saved_command_line, boot_command_line);
+	strcpy (static_command_line, command_line);
+}
+
 /*
  * We need to finalize in a non-__init function or else race conditions
  * between the root thread and the init thread may cause start_kernel to
@@ -453,7 +471,7 @@ void __init parse_early_param(void)
 		return;
 
 	/* All fall through to do_early_param. */
-	strlcpy(tmp_cmdline, saved_command_line, COMMAND_LINE_SIZE);
+	strlcpy(tmp_cmdline, boot_command_line, COMMAND_LINE_SIZE);
 	parse_args("early options", tmp_cmdline, NULL, 0, do_early_param);
 	done = 1;
 }
@@ -503,6 +521,7 @@ asmlinkage void __init start_kernel(void)
 	printk(KERN_NOTICE);
 	printk(linux_banner);
 	setup_arch(&command_line);
+	setup_command_line(command_line);
 	unwind_setup();
 	setup_per_cpu_areas();
 	smp_prepare_boot_cpu();	/* arch-specific boot-cpu hooks */
@@ -520,9 +539,9 @@ asmlinkage void __init start_kernel(void)
 	preempt_disable();
 	build_all_zonelists();
 	page_alloc_init();
-	printk(KERN_NOTICE "Kernel command line: %s\n", saved_command_line);
+	printk(KERN_NOTICE "Kernel command line: %s\n", boot_command_line);
 	parse_early_param();
-	parse_args("Booting kernel", command_line, __start___param,
+	parse_args("Booting kernel", static_command_line, __start___param,
 		   __stop___param - __start___param,
 		   &unknown_bootoption);
 	if (!irqs_disabled()) {