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authorThomas Petazzoni <thomas.petazzoni@free-electrons.com>2013-12-29 17:33:45 (GMT)
committer Thomas Petazzoni <thomas.petazzoni@free-electrons.com>2013-12-29 17:58:26 (GMT)
commited23c92b6267ac1ae4c118ecc6196fe019541141 (patch)
tree6087d3041d4b507078edc164c1d865e19014cdd9
parent015e8f2bd1800695f57e655904a6a674f0ef3e70 (diff)
downloadbuildroot-ed23c92b6267ac1ae4c118ecc6196fe019541141.tar.gz
buildroot-ed23c92b6267ac1ae4c118ecc6196fe019541141.tar.bz2
linux: enable initrd/initramfs support when cpio rootfs is chosen
When one enables the generation of a cpio archive of the root filesystem, the most likely usage is as an initramfs for the kernel. This commit ensures that the kernel has initramfs support when the rootfs cpio image format is chosen. This will for example ensure that if the user selects the ISO9660 filesystem format (which uses a cpio initramfs), the kernel will have proper support to load and use the initramfs. It is worth mentionning that when BR2_TARGET_ROOTFS_INITRAMFS is enabled, then BR2_TARGET_ROOTFS_CPIO is always enabled. That's why we move the enabling of CONFIG_BLK_DEV_INITRD from the initramfs case to the cpio case. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
-rw-r--r--linux/linux.mk3
1 files changed, 2 insertions, 1 deletions
diff --git a/linux/linux.mk b/linux/linux.mk
index 5af167d..fa8aa0c 100644
--- a/linux/linux.mk
+++ b/linux/linux.mk
@@ -169,13 +169,14 @@ define LINUX_CONFIGURE_CMDS
rm $(KERNEL_ARCH_PATH)/configs/buildroot_defconfig
$(if $(BR2_arm)$(BR2_armeb),
$(call KCONFIG_ENABLE_OPT,CONFIG_AEABI,$(@D)/.config))
+ $(if $(BR2_TARGET_ROOTFS_CPIO),
+ $(call KCONFIG_ENABLE_OPT,CONFIG_BLK_DEV_INITRD,$(@D)/.config))
# As the kernel gets compiled before root filesystems are
# built, we create a fake cpio file. It'll be
# replaced later by the real cpio archive, and the kernel will be
# rebuilt using the linux26-rebuild-with-initramfs target.
$(if $(BR2_TARGET_ROOTFS_INITRAMFS),
touch $(BINARIES_DIR)/rootfs.cpio
- $(call KCONFIG_ENABLE_OPT,CONFIG_BLK_DEV_INITRD,$(@D)/.config)
$(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_SOURCE,\"$(BINARIES_DIR)/rootfs.cpio\",$(@D)/.config)
$(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_ROOT_UID,0,$(@D)/.config)
$(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_ROOT_GID,0,$(@D)/.config))