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* initramfs: fix boot with dynamic /devPeter Korsgaard2011-07-202-2/+19
| | | | | | | | | | | Devtmpfs (which is used by devtmpfs/mdev/udev options) doesn't get automounted by the kernel when an initramfs is used, causing boot failures when a dynamic /dev is used. Fix it by adding a pre-init script to mount devtmpfs before running init. Reported-by: Arnout Vandecappelle <arnout@mind.be> Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
* initramfs: fix init symlink creationMike Frysinger2010-11-171-2/+2
| | | | | | | | | | The -e test will dereference the symlink, so if there is no /bin/init, we will constantly try to create the symlink. So rather than error on subsequent runs when the link exists, use the force flag to ln. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
* Remove INITRAMFS_TARGET variableThomas Petazzoni2010-11-041-6/+0
| | | | | | | | | | | | | This used to be needed when the filesystem code was rewritten, but not the Linux compilation code. Now that the Linux compilation code has been rewritten, the mechanism to ensure that initramfs gets built *before* the kernel so that it can be integrated is different, and this INITRAMFS_TARGET variable is no longer used. See f507921d391bb2578261a9e45c003e72302dc67a for details. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
* initramfs: Don't overwrite $(TARGET_DIR)/init if it existsSimon Pasch2010-08-291-2/+3
| | | | | | | | | Closes #2443 Allow use of custom init scripts. Signed-off-by: Simon Pasch <fpasch@googlemail.com> Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
* initramfs: update help textThomas Petazzoni2010-06-261-11/+13
| | | | | Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
* initramfs: only show the option when a Linux kernel is being builtThomas Petazzoni2010-06-261-0/+3
| | | | | | | Closes #2119 Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
* linux: add support for initramfsThomas Petazzoni2010-06-221-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In Buildroot, the kernel is built and installed *before* the root filesystems are built. This allows the root filesystem to correctly contain the kernel modules that have been installed. However, in the initramfs case, the root filesystem is part of the kernel. Therefore, the kernel should be built *after* the root filesystem (which, in the initramfs case simply builds a text file listing all files/directories/devices/symlinks that should be part of the initramfs). However, this isn't possible as the initramfs text file would lack all kernel modules. So, the solution choosen here is to keep the normal order: kernel is built before the root filesystem is generated, and to add a little quirk to retrigger a kernel compilation after the root filesystem generation. To do so, we add a ROOTFS_$(FSTYPE)_POST_TARGETS variable to the fs/common.mk infrastructure. This allows individual filesystems to set a target name that we should depend on *after* generating the root filesystem itself (contrary to normal ROOTFS_$(FSTYPE)_DEPENDENCIES, on which we depend *before* generating the root filesystem). The initramfs code in fs/initramfs/initramfs.mk uses this to add a dependency on 'linux26-rebuild-with-initramfs'. In linux/linux.mk, we do various things : * If BR2_TARGET_ROOTFS_INITRAMFS is enabled (i.e if initramfs is enabled as a root filesystem type), then we create an empty rootfs.initramfs file (remember that at this point, the root filesystem hasn't been generated) and we adjust the kernel configuration to include an initramfs. Of course, in the initial kernel build, this initramfs will be empty. * In the linux26-rebuild-with-initramfs target, we retrigger a compilation of the kernel image, after removing the initramfs in the kernel sources to make sure it gets properly rebuilt (we've experienced cases were modifying the rootfs.initramfs file wouldn't retrigger the generation of the initramfs at the kernel level). This is fairly quirky, but initramfs really is a special case, so in one way or another, we need a little quirk to solve its specialness. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
* initramfs: fix init symlinkWill Wagner2010-04-201-0/+2
| | | | | | | | When initramfs was ported to the new fs structure the init symlink macro was defined, but forgot to add it to PRE_GEN_HOOKS Signed-off-by: Will Wagner <will_wagner@carallon.com> Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
* Repair initramfs dependancies after move to fsWill Wagner2010-04-201-0/+6
| | | | | | | | | | The restructure for building root filesystems changed the target name for the initramfs file, to build the file the trget is now initramfs-root but the generated file is rootfs.initramfs Signed-off-by: Will Wagner <will_wagner@carallon.com> Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
* initramfs: trivial fix following move to fsWill Wagner2010-04-151-1/+1
| | | | | Signed-off-by: Will Wagner <will_wagner@carallon.com> Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
* Move all filesystem generation code to fs/Thomas Petazzoni2010-04-093-0/+236
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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