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Diffstat (limited to 'init/main.c')
-rw-r--r--init/main.c29
1 files changed, 24 insertions, 5 deletions
diff --git a/init/main.c b/init/main.c
index 4e88bddfbebf..4e9e92bb2b89 100644
--- a/init/main.c
+++ b/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;
@@ -400,6 +404,20 @@ 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
* be reaped by free_initmem before the root thread has proceeded 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()) {