cpio: fix boot with dynamic /dev

Quoted 1 line

Quoted 1 line

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Quoted 1 line

"Arnout" == Arnout Vandecappelle (Essensium/Mind) <[email protected]> writes:

From: "Arnout Vandecappelle (Essensium/Mind)" <[email protected]>

An initramfs is in fact the same as a cpio archive, but embedded in the kernel. ?So instead of duplicating the cpio infrastructure, we can simply build images/rootfs.cpio and link that into the kernel.
---

?fs/initramfs/Config.in ? ? ? ? ? ? | ? 13 ++-
?fs/initramfs/gen_initramfs_list.sh | ?203 ------------------------------------
?fs/initramfs/init ? ? ? ? ? ? ? ? ?| ? ?7 --
?fs/initramfs/initramfs.mk ? ? ? ? ?| ? 35 ++----
?linux/linux.mk ? ? ? ? ? ? ? ? ? ? | ? 17 ++--

?5 files changed, 25 insertions(+), 250 deletions(-) ?delete mode 100644 fs/initramfs/gen_initramfs_list.sh ?delete mode 100755 fs/initramfs/init

fs/initramfs/Config.in +0 -0

index abb3c0c..bbc2ab0 100644
@@ -1,20 +1,21 @@

?config BR2_TARGET_ROOTFS_INITRAMFS
? ? ? ?bool "initramfs for initial ramdisk of linux kernel" ? ? ? ?depends on BR2_LINUX_KERNEL
+ ? ? ? select BR2_TARGET_ROOTFS_CPIO
? ? ? ?help
? ? ? ? ?Integrate the root filesystem generated by Buildroot as an ? ? ? ? ?initramfs inside the kernel image. This integration will ? ? ? ? ?take place automatically.

- ? ? ? ? The rootfs.initramfs file generated in the images/ directory
- ? ? ? ? is only a text file describing the contents of the initramfs
- ? ? ? ? in a format understood by the CONFIG_INITRAMFS_SOURCE kernel
- ? ? ? ? configuration option.
+ ? ? ? ? A rootfs.cpio file will be generated in the images/ directory.
+ ? ? ? ? This is the archive that will be included in the kernel image.
+ ? ? ? ? The rootfs in the kernel will always be gzip'ed, regardless
+ ? ? ? ? of how buildroot's cpio archive is configured.

- ? ? ? ? Note that enabling initramfs together with other filesystem
+ ? ? ? ? Note that enabling initramfs together with another filesystem ? ? ? ? ?formats doesn't make sense: you would end up having two ? ? ? ? ?identical root filesystems, one embedded inside the kernel
- ? ? ? ? image, and one separatly.
+ ? ? ? ? image, and one separately.

?comment "initramfs requires a Linux kernel to be built" ? ? ? ?depends on !BR2_LINUX_KERNEL

fs/initramfs/gen_initramfs_list.sh deleted +0 -203

deleted file mode 100644
index 26252b6..0000000
@@ -1,203 +0,0 @@
-#!/bin/sh
-# Copyright (C) Martin Schlemmer <[email protected]>
-# Released under the terms of the GNU GPL
-#
-# Generate a newline separated list of entries from the file/directory
-# supplied as an argument.
-#
-# If a file/directory is not supplied then generate a small dummy file.
-#
-# The output is suitable for gen_init_cpio built from usr/gen_init_cpio.c.
-#
-
-default_initramfs() {
- ? ? ? cat <<-EOF
- ? ? ? ? ? ? ? # This is a very simple, default initramfs
-
- ? ? ? ? ? ? ? dir /dev 0755 0 0
- ? ? ? ? ? ? ? nod /dev/console 0600 0 0 c 5 1
- ? ? ? ? ? ? ? dir /root 0700 0 0
- ? ? ? EOF
-}
-
-filetype() {
- ? ? ? local argv1="$1"
-
- ? ? ? # symlink test must come before file test
- ? ? ? if [ -L "$argv1" ]; then
- ? ? ? ? ? ? ? echo "slink"
- ? ? ? elif [ -f "$argv1" ]; then
- ? ? ? ? ? ? ? echo "file"
- ? ? ? elif [ -d "$argv1" ]; then
- ? ? ? ? ? ? ? echo "dir"
- ? ? ? elif [ -b "$argv1" -o -c "$argv1" ]; then
- ? ? ? ? ? ? ? echo "nod"
- ? ? ? elif [ -p "$argv1" ]; then
- ? ? ? ? ? ? ? echo "pipe"
- ? ? ? elif [ -S "$argv1" ]; then
- ? ? ? ? ? ? ? echo "sock"
- ? ? ? else
- ? ? ? ? ? ? ? echo "invalid"
- ? ? ? fi
- ? ? ? return 0
-}
-
-print_mtime() {
- ? ? ? local argv1="$1"
- ? ? ? local mymtime="0"
-
- ? ? ? if [ -e "$argv1" ]; then
- ? ? ? ? ? ? ? mymtime=$(find "$argv1" -printf "%T@\n" | sort -r | head -n 1)
- ? ? ? fi
-
- ? ? ? echo "# Last modified: $mymtime"
- ? ? ? echo
-}
-
-parse() {
- ? ? ? local location="$1"
- ? ? ? local name=$(echo "$location" | sed -e "s,$srcdir,,")
- ? ? ? # change '//' into '/'
- ? ? ? name=$(echo $name | sed -e 's,/[/]*,/,g')
- ? ? ? local mode="$2"
- ? ? ? local uid="$3"
- ? ? ? local gid="$4"
- ? ? ? local ftype=$(filetype "$location")
- ? ? ? # remap uid/gid to 0 if necessary
- ? ? ? [ "x$uid" != "x" ] && [ $uid -eq $root_uid ] && uid=0
- ? ? ? [ "x$gid" != "x" ] && [ $gid -eq $root_gid ] && gid=0
- ? ? ? local str="$mode $uid $gid"
-
- ? ? ? [ "$ftype" = "invalid" ] && return 0
- ? ? ? [ "$location" = "$srcdir" ] && return 0
-
- ? ? ? case "$ftype" in
- ? ? ? ? ? ? ? "file")
- ? ? ? ? ? ? ? ? ? ? ? str="$ftype $name $location $str"
- ? ? ? ? ? ? ? ? ? ? ? ;;
- ? ? ? ? ? ? ? "nod")
- ? ? ? ? ? ? ? ? ? ? ? local devtype=
- ? ? ? ? ? ? ? ? ? ? ? local maj=$(LC_ALL=C ls -l "$location" | \
- ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? awk '{sub(/,/, "", $5); print $5}')
- ? ? ? ? ? ? ? ? ? ? ? local min=$(LC_ALL=C ls -l "$location" | \
- ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? awk '{print $6}')
-
- ? ? ? ? ? ? ? ? ? ? ? if [ -b "$location" ]; then
- ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? devtype="b"
- ? ? ? ? ? ? ? ? ? ? ? else
- ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? devtype="c"
- ? ? ? ? ? ? ? ? ? ? ? fi
- ? ? ? ? ? ? ? ? ? ? ? str="$ftype $name $str $devtype $maj $min"
- ? ? ? ? ? ? ? ? ? ? ? ;;
- ? ? ? ? ? ? ? "slink")
- ? ? ? ? ? ? ? ? ? ? ? local target=$(LC_ALL=C ls -l "$location" | \
- ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? awk '{print $11}')
- ? ? ? ? ? ? ? ? ? ? ? str="$ftype $name $target $str"
- ? ? ? ? ? ? ? ? ? ? ? ;;
- ? ? ? ? ? ? ? *)
- ? ? ? ? ? ? ? ? ? ? ? str="$ftype $name $str"
- ? ? ? ? ? ? ? ? ? ? ? ;;
- ? ? ? esac
-
- ? ? ? echo "$str"
-
- ? ? ? return 0
-}
-
-usage() {
- ? ? ? printf ? ?"Usage:\n"
- ? ? ? printf ? ?"$0 [ [-u <root_uid>] [-g <root_gid>] [-d | <cpio_source>] ] . . .\n"
- ? ? ? printf ? ?"\n"
- ? ? ? printf -- "-u <root_uid> ?User ID to map to user ID 0 (root).\n"
- ? ? ? printf ? ?" ? ? ? ? ? ? ? <root_uid> is only meaningful if <cpio_source>\n"
- ? ? ? printf ? ?" ? ? ? ? ? ? ? is a directory.\n"
- ? ? ? printf -- "-g <root_gid> ?Group ID to map to group ID 0 (root).\n"
- ? ? ? printf ? ?" ? ? ? ? ? ? ? <root_gid> is only meaningful if <cpio_source>\n"
- ? ? ? printf ? ?" ? ? ? ? ? ? ? is a directory.\n"
- ? ? ? printf ? ?"<cpio_source> ?File list or directory for cpio archive.\n"
- ? ? ? printf ? ?" ? ? ? ? ? ? ? If <cpio_source> is not provided then a\n"
- ? ? ? printf ? ?" ? ? ? ? ? ? ? a default list will be output.\n"
- ? ? ? printf -- "-d ? ? ? ? ? ? Output the default cpio list. ?If no <cpio_source>\n"
- ? ? ? printf ? ?" ? ? ? ? ? ? ? is given then the default cpio list will be output.\n"
- ? ? ? printf ? ?"\n"
- ? ? ? printf ? ?"All options may be repeated and are interpreted sequentially\n"
- ? ? ? printf ? ?"and immediately. ?-u and -g states are preserved across\n"
- ? ? ? printf ? ?"<cpio_source> options so an explicit \"-u 0 -g 0\" is required\n"
- ? ? ? printf ? ?"to reset the root/group mapping.\n"
-}
-
-build_list() {
- ? ? ? printf "\n#####################\n# $cpio_source\n"
-
- ? ? ? if [ -f "$cpio_source" ]; then
- ? ? ? ? ? ? ? print_mtime "$cpio_source"
- ? ? ? ? ? ? ? cat "$cpio_source"
- ? ? ? elif [ -d "$cpio_source" ]; then
- ? ? ? ? ? ? ? srcdir=$(echo "$cpio_source" | sed -e 's://*:/:g;s:/$::')
- ? ? ? ? ? ? ? dirlist=$(find "$srcdir" -printf "%p %m %U %G\n" 2>/dev/null)
-
- ? ? ? ? ? ? ? # If $dirlist is only one line, then the directory is empty
- ? ? ? ? ? ? ? if [ ?"$(echo "$dirlist" | wc -l)" -gt 1 ]; then
- ? ? ? ? ? ? ? ? ? ? ? print_mtime "$cpio_source"
-
- ? ? ? ? ? ? ? ? ? ? ? echo "$dirlist" | \
- ? ? ? ? ? ? ? ? ? ? ? while read x; do
- ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? parse $x
- ? ? ? ? ? ? ? ? ? ? ? done
- ? ? ? ? ? ? ? else
- ? ? ? ? ? ? ? ? ? ? ? # Failsafe in case directory is empty
- ? ? ? ? ? ? ? ? ? ? ? default_initramfs
- ? ? ? ? ? ? ? fi
- ? ? ? else
- ? ? ? ? ? ? ? echo " ?$0: Cannot open '$cpio_source'" >&2
- ? ? ? ? ? ? ? exit 1
- ? ? ? fi
-}
-
-
-root_uid=0
-root_gid=0
-
-while [ $# -gt 0 ]; do
- ? ? ? arg="$1"
- ? ? ? shift
- ? ? ? case "$arg" in
- ? ? ? ? ? ? ? "-u")
- ? ? ? ? ? ? ? ? ? ? ? root_uid="$1"
- ? ? ? ? ? ? ? ? ? ? ? shift
- ? ? ? ? ? ? ? ? ? ? ? ;;
- ? ? ? ? ? ? ? "-g")
- ? ? ? ? ? ? ? ? ? ? ? root_gid="$1"
- ? ? ? ? ? ? ? ? ? ? ? shift
- ? ? ? ? ? ? ? ? ? ? ? ;;
- ? ? ? ? ? ? ? "-d")
- ? ? ? ? ? ? ? ? ? ? ? default_list="$arg"
- ? ? ? ? ? ? ? ? ? ? ? default_initramfs
- ? ? ? ? ? ? ? ? ? ? ? ;;
- ? ? ? ? ? ? ? "-h")
- ? ? ? ? ? ? ? ? ? ? ? usage
- ? ? ? ? ? ? ? ? ? ? ? exit 0
- ? ? ? ? ? ? ? ? ? ? ? ;;
- ? ? ? ? ? ? ? *)
- ? ? ? ? ? ? ? ? ? ? ? case "$arg" in
- ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? "-"*)
- ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? printf "ERROR: unknown option \"$arg\"\n" >&2
- ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? printf "If the filename validly begins with '-', then it must be prefixed\n" >&2
- ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? printf "by './' so that it won't be interpreted as an option." >&2
- ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? printf "\n" >&2
- ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? usage >&2
- ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? exit 1
- ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ;;
- ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? *)
- ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? cpio_source="$arg"
- ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? build_list
- ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ;;
- ? ? ? ? ? ? ? ? ? ? ? esac
- ? ? ? ? ? ? ? ? ? ? ? ;;
- ? ? ? esac
-done
-
-# spit out the default cpio list if a source hasn't been specified
-[ -z "$cpio_source" -a -z "$default_list" ] && default_initramfs
-
-exit 0

fs/initramfs/init deleted +0 -7

deleted file mode 100755
index a275482..0000000
@@ -1,7 +0,0 @@
-#!/bin/sh
-# devtmpfs does not get automounted for initramfs
-/bin/mount -t devtmpfs devtmpfs /dev
-exec 0</dev/console
-exec 1>/dev/console
-exec 2>/dev/console
-exec /sbin/init $*

fs/initramfs/initramfs.mk +0 -0

index 1cd48b6..f1eb8b6 100644
@@ -1,36 +1,23 @@

?############################################################# ?#

fs/initramfs/initramfs.mk +2 -3

-# Make a initramfs_list file to be used by gen_init_cpio
-# gen_init_cpio is part of the 2.6 linux kernels to build an
-# initial ramdisk filesystem based on cpio
+# Build a kernel with an integrated initial ramdisk
+# filesystem based on cpio.

?# ?#############################################################

fs/initramfs/initramfs.mk +4 -16

-ifeq ($(BR2_ROOTFS_DEVICE_CREATION_STATIC),y)
+ROOTFS_INITRAMFS_DEPENDENCIES += rootfs-cpio
 
-define ROOTFS_INITRAMFS_ADD_INIT
- ? ? ? if [ ! -e $(TARGET_DIR)/init ]; then \
- ? ? ? ? ? ? ? ln -sf sbin/init $(TARGET_DIR)/init; \
- ? ? ? fi
-endef
+ROOTFS_INITRAMFS_POST_TARGETS += linux26-rebuild-with-initramfs
 
-else
-# devtmpfs does not get automounted when initramfs is used.
-# Add a pre-init script to mount it before running init
-define ROOTFS_INITRAMFS_ADD_INIT
- ? ? ? if [ ! -e $(TARGET_DIR)/init ]; then \
- ? ? ? ? ? ? ? $(INSTALL) -m 0755 fs/initramfs/init $(TARGET_DIR)/init; \
- ? ? ? fi
-endef
 
-endif # BR2_ROOTFS_DEVICE_CREATION_STATIC
+# The generic fs infrastructure isn't very useful here.
 
-ROOTFS_INITRAMFS_PRE_GEN_HOOKS += ROOTFS_INITRAMFS_ADD_INIT
+rootfs-initramfs: $(ROOTFS_INITRAMFS_DEPENDENCIES) $(ROOTFS_INITRAMFS_POST_TARGETS)
 

-$(eval $(call ROOTFS_TARGET,initramfs))

linux/linux.mk +0 -0

index e6cf01a..52cc460 100644
@@ -126,13 +126,13 @@ define LINUX_CONFIGURE_CMDS
 ? ? ? ? ? ? ? ?$(call KCONFIG_ENABLE_OPT,CONFIG_AEABI,$(@D)/.config),
 ? ? ? ? ? ? ? ?$(call KCONFIG_DISABLE_OPT,CONFIG_AEABI,$(@D)/.config))

? ? ? ?# As the kernel gets compiled before root filesystems are
- ? ? ? # built, we create a fake initramfs file list. It'll be
- ? ? ? # replaced later by the real list, and the kernel will be
+ ? ? ? # 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.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.initramfs\",$(@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,$(@D)/.config)
? ? ? ? ? ? ? ?$(call KCONFIG_DISABLE_OPT,CONFIG_INITRAMFS_COMPRESSION_NONE,$(@D)/.config)

linux/linux.mk +3 -6

@@ -184,13 +184,10 @@ linux-menuconfig linux-xconfig linux-gconfig linux-nconfig linux26-menuconfig li
 ? ? ? ? ? ? ? ?$(subst linux-,,$(subst linux26-,,$@))
 ? ? ? ?rm -f $(LINUX_DIR)/.stamp_{built,target_installed,images_installed}
 
-# Support for rebuilding the kernel after the initramfs file list has
-# been generated in $(BINARIES_DIR)/rootfs.initramfs.
-$(LINUX_DIR)/.stamp_initramfs_rebuilt: $(LINUX_DIR)/.stamp_target_installed $(LINUX_DIR)/.stamp_images_installed $(BINARIES_DIR)/rootfs.initramfs
+# Support for rebuilding the kernel after the cpio archive has
+# been generated in $(BINARIES_DIR)/rootfs.cpio.
+$(LINUX_DIR)/.stamp_initramfs_rebuilt: $(LINUX_DIR)/.stamp_target_installed $(LINUX_DIR)/.stamp_images_installed $(BINARIES_DIR)/rootfs.cpio
 ? ? ? ?@$(call MESSAGE,"Rebuilding kernel with initramfs")
- ? ? ? # Remove the previously generated initramfs which was empty,
- ? ? ? # to make sure the kernel will actually regenerate it.
- ? ? ? $(RM) -f $(@D)/usr/initramfs_data.cpio*

? ? ? ?# Build the kernel.
? ? ? ?$(TARGET_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) $(LINUX_IMAGE_NAME) ? ? ? ?# Copy the kernel image to its final destination
--
1.7.5.4

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After my upstep to buildroot-2012.02, I am experiencing problems with the kernel:

[    0.053620] Kernel panic - not syncing: junk in compressed archive  <===

[    0.126574] Call Trace:
[    0.155738] [ec057f00] [c0006fe4] show_stack+0x78/0x18c (unreliable)
[    0.231769] [ec057f40] [c02f0db4] panic+0xc0/0x1e8
[    0.289055] [ec057f90] [c03c4370] populate_rootfs+0x34/0xc8
[    0.355714] [ec057fa0] [c0001cc0] do_one_initcall+0xf4/0x1ec
[    0.423418] [ec057fd0] [c03c2388] kernel_init+0x194/0x24c
[    0.488000] [ec057ff0] [c000dcd0] kernel_thread+0x4c/0x68
[    0.552583] Rebooting in 5 seconds..

We are not putting the rootfs inside the kernel image, but next to it. The kernel is notified of the location of this image using the device tree.

Looking at the changes you did above, I'm a bit confused about when the target linux26-rebuild-with-initramfs is supposed to be built. In my case, BR2_TARGET_ROOTFS_INITRAMFS is not set (BR2_TARGET_ROOTFS_CPIO is), so the TARGETS variable does not contain target 'rootfs-initramfs'. This means the variable ROOTFS_INITRAMFS_POST_TARGETS is never considered.

Is this expected behavior?
I cannot yet prove that this patch caused the behavior I'm seeing (I'm currently investigating this further), but it would be nice to get some feedback already.

Quoted 8 lines · On Tuesday 13 March 2012 16:49:08 Thomas De Schampheleire wrote:

After my upstep to buildroot-2012.02, I am experiencing problems with

the kernel:

[????0.053620] Kernel panic - not syncing: junk in compressed archive??<===

Looks like your cpio archive is compressed with an algorithm that is

not recognized by your kernel configuration... Can you check:

- that the generated rootfs.cpio.* is a valid compressed archive; and

- that the compression algorithm is configured in the kernel.

Quoted 32 lines

[????0.126574] Call Trace:

[????0.155738] [ec057f00] [c0006fe4] show_stack+0x78/0x18c (unreliable)

[????0.231769] [ec057f40] [c02f0db4] panic+0xc0/0x1e8

[????0.289055] [ec057f90] [c03c4370] populate_rootfs+0x34/0xc8

[????0.355714] [ec057fa0] [c0001cc0] do_one_initcall+0xf4/0x1ec

[????0.423418] [ec057fd0] [c03c2388] kernel_init+0x194/0x24c

[????0.488000] [ec057ff0] [c000dcd0] kernel_thread+0x4c/0x68

[????0.552583] Rebooting in 5 seconds..

We are not putting the rootfs inside the kernel image, but next to it.

The kernel is notified of the location of this image using the device

tree.

Looking at the changes you did above, I'm a bit confused about when

the target linux26-rebuild-with-initramfs is supposed to be built. In

Quoted 7 lines

my case, BR2_TARGET_ROOTFS_INITRAMFS is not set

(BR2_TARGET_ROOTFS_CPIO is), so the TARGETS variable does not contain

target 'rootfs-initramfs'. This means the variable

ROOTFS_INITRAMFS_POST_TARGETS is never considered.

If you're using an initramfs that is not linked into the kernel, then

you're not using the BR2_TARGET_ROOTFS_INITRAMFS infrastructure, so you

shouldn't be affected by this patch.

linux26-rebuild-with-initramfs is only needed to create a kernel with

the embedded initramfs.

Quoted 3 lines

Is this expected behavior?

Quoted 5 lines

I cannot yet prove that this patch caused the behavior I'm seeing (I'm

currently investigating this further), but it would be nice to get

some feedback already.

This patch should be relatively easy to revert, no?

linux/linux.mk contains:

        $(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)
                ...

This means that this code will be executed, even if BR2_TARGET_ROOTFS_INITRAMFS is explicitly set to 'n'. This may not be a common case, but I think it is valid to do so (I do so).

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"Arnout" == Arnout Vandecappelle (Essensium/Mind) <[email protected]> writes: