diff options
| -rw-r--r-- | drivers/block/Kconfig | 4 | ||||
| -rw-r--r-- | init/Kconfig | 4 | ||||
| -rw-r--r-- | init/Makefile | 7 | ||||
| -rw-r--r-- | init/noinitramfs.c | 52 | ||||
| -rw-r--r-- | usr/Makefile | 2 |
5 files changed, 66 insertions, 3 deletions
diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig index 58c1deb..cacb1c8 100644 --- a/drivers/block/Kconfig +++ b/drivers/block/Kconfig @@ -417,8 +417,10 @@ config BLK_DEV_INITRD etc. See <file:Documentation/initrd.txt> for details. If RAM disk support (BLK_DEV_RAM) is also included, this - also enables initial RAM disk (initrd) support. + also enables initial RAM disk (initrd) support and adds + 15 Kbytes (more on some other architectures) to the kernel size. + If unsure say Y. config CDROM_PKTCDVD tristate "Packet writing on CD/DVD media" diff --git a/init/Kconfig b/init/Kconfig index a3f83e2..ab69422 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -280,8 +280,12 @@ 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 diff --git a/init/Makefile b/init/Makefile index 633a268..0154aea 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-$(CONFIG_GENERIC_CALIBRATE_DELAY) += calibrate.o mounts-y := do_mounts.o diff --git a/init/noinitramfs.c b/init/noinitramfs.c new file mode 100644 index 0000000..f4c1a3a --- /dev/null +++ b/init/noinitramfs.c @@ -0,0 +1,52 @@ +/* + * init/noinitramfs.c + * + * Copyright (C) 2006, NXP Semiconductors, All Rights Reserved + * Author: Jean-Paul Saman <jean-paul.saman@nxp.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ +#include <linux/init.h> +#include <linux/stat.h> +#include <linux/kdev_t.h> +#include <linux/syscalls.h> + +/* + * Create a simple rootfs that is similar to the default initramfs + */ +static int __init default_rootfs(void) +{ + int err; + + err = sys_mkdir("/dev", 0755); + if (err < 0) + goto out; + + err = sys_mknod((const char __user *) "/dev/console", + S_IFCHR | S_IRUSR | S_IWUSR, + new_encode_dev(MKDEV(5, 1))); + if (err < 0) + goto out; + + err = sys_mkdir("/root", 0700); + if (err < 0) + goto out; + + return 0; + +out: + printk(KERN_WARNING "Failed to create a rootfs\n"); + return err; +} +rootfs_initcall(default_rootfs); diff --git a/usr/Makefile b/usr/Makefile index 382702a..201f27f 100644 --- a/usr/Makefile +++ b/usr/Makefile @@ -7,7 +7,7 @@ PHONY += klibcdirs # Generate builtin.o based on initramfs_data.o -obj-y := initramfs_data.o +obj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data.o # initramfs_data.o contains the initramfs_data.cpio.gz image. # The image is included using .incbin, a dependency which is not |
