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-rw-r--r--init/Kconfig40
-rw-r--r--init/Makefile7
-rw-r--r--init/initramfs.c17
-rw-r--r--init/main.c34
-rw-r--r--init/noinitramfs.c52
5 files changed, 120 insertions, 30 deletions
diff --git a/init/Kconfig b/init/Kconfig
index a3f83e2c825..ad33c979e0b 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -192,6 +192,24 @@ config TASK_DELAY_ACCT
Say N if unsure.
+config TASK_XACCT
+ bool "Enable extended accounting over taskstats (EXPERIMENTAL)"
+ depends on TASKSTATS
+ help
+ Collect extended task accounting data and send the data
+ to userland for processing over the taskstats interface.
+
+ Say N if unsure.
+
+config TASK_IO_ACCOUNTING
+ bool "Enable per-task storage I/O accounting (EXPERIMENTAL)"
+ depends on TASK_XACCT
+ help
+ Collect information on the number of bytes of storage I/O which this
+ task has caused.
+
+ Say N if unsure.
+
config UTS_NS
bool "UTS Namespaces"
default n
@@ -280,8 +298,12 @@ config RELAY
If unsure, say N.
+if BLK_DEV_INITRD
+
source "usr/Kconfig"
+endif
+
config CC_OPTIMIZE_FOR_SIZE
bool "Optimize for size (Look out for broken compilers!)"
default y
@@ -295,24 +317,6 @@ config CC_OPTIMIZE_FOR_SIZE
If unsure, say N.
-config TASK_XACCT
- bool "Enable extended accounting over taskstats (EXPERIMENTAL)"
- depends on TASKSTATS
- help
- Collect extended task accounting data and send the data
- to userland for processing over the taskstats interface.
-
- Say N if unsure.
-
-config TASK_IO_ACCOUNTING
- bool "Enable per-task storage I/O accounting (EXPERIMENTAL)"
- depends on TASK_XACCT
- help
- Collect information on the number of bytes of storage I/O which this
- task has caused.
-
- Say N if unsure.
-
config SYSCTL
bool
diff --git a/init/Makefile b/init/Makefile
index 633a268d270..0154aea1e52 100644
--- a/init/Makefile
+++ b/init/Makefile
@@ -2,7 +2,12 @@
# Makefile for the linux kernel.
#
-obj-y := main.o version.o mounts.o initramfs.o
+obj-y := main.o version.o mounts.o
+ifneq ($(CONFIG_BLK_DEV_INITRD),y)
+obj-y += noinitramfs.o
+else
+obj-$(CONFIG_BLK_DEV_INITRD) += initramfs.o
+endif
obj-$(CONFIG_GENERIC_CALIBRATE_DELAY) += calibrate.o
mounts-y := do_mounts.o
diff --git a/init/initramfs.c b/init/initramfs.c
index 4fa0f7977de..00eff7a1108 100644
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -491,6 +491,17 @@ static char * __init unpack_to_rootfs(char *buf, unsigned len, int check_only)
return message;
}
+static int __initdata do_retain_initrd;
+
+static int __init retain_initrd_param(char *str)
+{
+ if (*str)
+ return 0;
+ do_retain_initrd = 1;
+ return 1;
+}
+__setup("retain_initrd", retain_initrd_param);
+
extern char __initramfs_start[], __initramfs_end[];
#ifdef CONFIG_BLK_DEV_INITRD
#include <linux/initrd.h>
@@ -501,7 +512,11 @@ static void __init free_initrd(void)
#ifdef CONFIG_KEXEC
unsigned long crashk_start = (unsigned long)__va(crashk_res.start);
unsigned long crashk_end = (unsigned long)__va(crashk_res.end);
+#endif
+ if (do_retain_initrd)
+ goto skip;
+#ifdef CONFIG_KEXEC
/*
* If the initrd region is overlapped with crashkernel reserved region,
* free only memory that is not part of crashkernel region.
@@ -519,7 +534,7 @@ static void __init free_initrd(void)
} else
#endif
free_initrd_mem(initrd_start, initrd_end);
-
+skip:
initrd_start = 0;
initrd_end = 0;
}
diff --git a/init/main.c b/init/main.c
index 8b4a7d76916..4e9e92bb2b8 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;
@@ -395,16 +399,25 @@ static void __init smp_init(void)
/* Any cleanup work */
printk(KERN_INFO "Brought up %ld CPUs\n", (long)num_online_cpus());
smp_cpus_done(max_cpus);
-#if 0
- /* Get other processors into their bootup holding patterns. */
-
- smp_commence();
-#endif
}
#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
@@ -458,7 +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;
}
@@ -508,6 +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 */
@@ -525,9 +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()) {
diff --git a/init/noinitramfs.c b/init/noinitramfs.c
new file mode 100644
index 00000000000..f4c1a3a1b8c
--- /dev/null
+++ b/init/noinitramfs.c
@@ -0,0 +1,52 @@
+/*
+ * init/noinitramfs.c
+ *
+ * Copyright (C) 2006, NXP Semiconductors, All Rights Reserved
+ * Author: Jean-Paul Saman <jean-paul.saman@nxp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#include <linux/init.h>
+#include <linux/stat.h>
+#include <linux/kdev_t.h>
+#include <linux/syscalls.h>
+
+/*
+ * Create a simple rootfs that is similar to the default initramfs
+ */
+static int __init default_rootfs(void)
+{
+ int err;
+
+ err = sys_mkdir("/dev", 0755);
+ if (err < 0)
+ goto out;
+
+ err = sys_mknod((const char __user *) "/dev/console",
+ S_IFCHR | S_IRUSR | S_IWUSR,
+ new_encode_dev(MKDEV(5, 1)));
+ if (err < 0)
+ goto out;
+
+ err = sys_mkdir("/root", 0700);
+ if (err < 0)
+ goto out;
+
+ return 0;
+
+out:
+ printk(KERN_WARNING "Failed to create a rootfs\n");
+ return err;
+}
+rootfs_initcall(default_rootfs);