From b83419363eff1535309df97a4bf319c42d900a9c Mon Sep 17 00:00:00 2001
From: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Date: Mon, 22 Mar 2010 16:49:32 -0600
Subject: kbuild: Include gen_initramfs_list.sh and the file list in the .d
file
Expand the dependency set used for the initrd to include the
CONFIG_INITRAMFS_SOURCE file and the generator script itself.
Otherwise changing the initramfs file list does not rebuild the CPIO.
Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
---
scripts/gen_initramfs_list.sh | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
(limited to 'scripts/gen_initramfs_list.sh')
diff --git a/scripts/gen_initramfs_list.sh b/scripts/gen_initramfs_list.sh
index 76af5f9623e3..f3b5c05ced40 100644
--- a/scripts/gen_initramfs_list.sh
+++ b/scripts/gen_initramfs_list.sh
@@ -202,6 +202,7 @@ input_file() {
print_mtime "$1" >> ${output}
cat "$1" >> ${output}
else
+ echo "$1 \\"
cat "$1" | while read type dir file perm ; do
if [ "$type" == "file" ]; then
echo "$file \\";
@@ -231,7 +232,7 @@ arg="$1"
case "$arg" in
"-l") # files included in initramfs - used by kbuild
dep_list="list_"
- echo "deps_initramfs := \\"
+ echo "deps_initramfs := $0 \\"
shift
;;
"-o") # generate compressed cpio image named $1
--
cgit
From 2a2a400f66e9e23eba960905c36dd37904bd9970 Mon Sep 17 00:00:00 2001
From: Albin Tonnerre <albin.tonnerre@free-electrons.com>
Date: Wed, 26 May 2010 14:44:28 -0700
Subject: initramfs: add support for in-kernel initramfs compressed with LZO
Add the necessary parts to be enable the use of LZO-compressed initramfs
build into the kernel.
Signed-off-by: Albin Tonnerre <albin.tonnerre@free-electrons.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Michal Marek <mmarek@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
scripts/gen_initramfs_list.sh | 1 +
usr/Makefile | 5 ++++-
usr/initramfs_data.lzo.S | 29 +++++++++++++++++++++++++++++
3 files changed, 34 insertions(+), 1 deletion(-)
create mode 100644 usr/initramfs_data.lzo.S
(limited to 'scripts/gen_initramfs_list.sh')
diff --git a/scripts/gen_initramfs_list.sh b/scripts/gen_initramfs_list.sh
index 76af5f9623e3..a932ae52f921 100644
--- a/scripts/gen_initramfs_list.sh
+++ b/scripts/gen_initramfs_list.sh
@@ -242,6 +242,7 @@ case "$arg" in
echo "$output_file" | grep -q "\.gz$" && compr="gzip -9 -f"
echo "$output_file" | grep -q "\.bz2$" && compr="bzip2 -9 -f"
echo "$output_file" | grep -q "\.lzma$" && compr="lzma -9 -f"
+ echo "$output_file" | grep -q "\.lzo$" && compr="lzop -9 -f"
echo "$output_file" | grep -q "\.cpio$" && compr="cat"
shift
;;
diff --git a/usr/Makefile b/usr/Makefile
index 1e6a9e4a72cc..6b4b6da0b67d 100644
--- a/usr/Makefile
+++ b/usr/Makefile
@@ -15,6 +15,9 @@ suffix_$(CONFIG_INITRAMFS_COMPRESSION_BZIP2) = .bz2
# Lzma
suffix_$(CONFIG_INITRAMFS_COMPRESSION_LZMA) = .lzma
+# Lzo
+suffix_$(CONFIG_INITRAMFS_COMPRESSION_LZO) = .lzo
+
# Generate builtin.o based on initramfs_data.o
obj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data$(suffix_y).o
@@ -45,7 +48,7 @@ endif
quiet_cmd_initfs = GEN $@
cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input)
-targets := initramfs_data.cpio.gz initramfs_data.cpio.bz2 initramfs_data.cpio.lzma initramfs_data.cpio
+targets := initramfs_data.cpio.gz initramfs_data.cpio.bz2 initramfs_data.cpio.lzma initramfs_data.cpio.lzo initramfs_data.cpio
# do not try to update files included in initramfs
$(deps_initramfs): ;
diff --git a/usr/initramfs_data.lzo.S b/usr/initramfs_data.lzo.S
new file mode 100644
index 000000000000..59211905da84
--- /dev/null
+++ b/usr/initramfs_data.lzo.S
@@ -0,0 +1,29 @@
+/*
+ initramfs_data includes the compressed binary that is the
+ filesystem used for early user space.
+ Note: Older versions of "as" (prior to binutils 2.11.90.0.23
+ released on 2001-07-14) dit not support .incbin.
+ If you are forced to use older binutils than that then the
+ following trick can be applied to create the resulting binary:
+
+
+ ld -m elf_i386 --format binary --oformat elf32-i386 -r \
+ -T initramfs_data.scr initramfs_data.cpio.gz -o initramfs_data.o
+ ld -m elf_i386 -r -o built-in.o initramfs_data.o
+
+ initramfs_data.scr looks like this:
+SECTIONS
+{
+ .init.ramfs : { *(.data) }
+}
+
+ The above example is for i386 - the parameters vary from architectures.
+ Eventually look up LDFLAGS_BLOB in an older version of the
+ arch/$(ARCH)/Makefile to see the flags used before .incbin was introduced.
+
+ Using .incbin has the advantage over ld that the correct flags are set
+ in the ELF header, as required by certain architectures.
+*/
+
+.section .init.ramfs,"a"
+.incbin "usr/initramfs_data.cpio.lzo"
--
cgit