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| author | P J P <ppandit@redhat.com> | 2013-11-12 15:10:22 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-11-13 12:09:26 +0900 |
| commit | 9ba4bcb645898d562498ea66a0df958ef0e7a68c (patch) | |
| tree | 20befe80438adaec351eff0eb1f225d0b3df0963 /usr | |
| parent | ba24762bd53faaf39cc8b991175636954b7ef4be (diff) | |
| download | lwn-9ba4bcb645898d562498ea66a0df958ef0e7a68c.tar.gz lwn-9ba4bcb645898d562498ea66a0df958ef0e7a68c.zip | |
initramfs: read CONFIG_RD_ variables for initramfs compression
When expert configuration option(CONFIG_EXPERT) is enabled, menuconfig
offers a choice of compression algorithm to compress initial ramfs image;
This choice is stored into CONFIG_RD_* variables. But usr/Makefile uses
earlier INITRAMFS_COMPRESSION_* macros to build initial ramfs file. Since
none of them is defined, resulting 'initramfs_data.cpio' file remains
un-compressed.
This patch updates the Makefile to use CONFIG_RD_* variables and adds
support for LZ4 compression algorithm. Also updates the
'gen_initramfs_list.sh' script to check whether a selected compression
command is accessible or not. And fall-back to default gzip(1)
compression when it is not.
Signed-off-by: P J P <prasad@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'usr')
| -rw-r--r-- | usr/Makefile | 23 |
1 files changed, 14 insertions, 9 deletions
diff --git a/usr/Makefile b/usr/Makefile index 029ffe6cd0d8..e767f019accf 100644 --- a/usr/Makefile +++ b/usr/Makefile @@ -6,20 +6,23 @@ klibcdirs:; PHONY += klibcdirs -# Gzip -suffix_$(CONFIG_INITRAMFS_COMPRESSION_GZIP) = .gz - # Bzip2 -suffix_$(CONFIG_INITRAMFS_COMPRESSION_BZIP2) = .bz2 +suffix_$(CONFIG_RD_BZIP2) = .bz2 # Lzma -suffix_$(CONFIG_INITRAMFS_COMPRESSION_LZMA) = .lzma +suffix_$(CONFIG_RD_LZMA) = .lzma # XZ -suffix_$(CONFIG_INITRAMFS_COMPRESSION_XZ) = .xz +suffix_$(CONFIG_RD_XZ) = .xz # Lzo -suffix_$(CONFIG_INITRAMFS_COMPRESSION_LZO) = .lzo +suffix_$(CONFIG_RD_LZO) = .lzo + +# Lz4 +suffix_$(CONFIG_RD_LZ4) = .lz4 + +# Gzip +suffix_$(CONFIG_RD_GZIP) = .gz AFLAGS_initramfs_data.o += -DINITRAMFS_IMAGE="usr/initramfs_data.cpio$(suffix_y)" @@ -53,7 +56,10 @@ 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.xz initramfs_data.cpio.lzo initramfs_data.cpio +targets := initramfs_data.cpio.gz initramfs_data.cpio.bz2 \ + initramfs_data.cpio.lzma initramfs_data.cpio.xz \ + initramfs_data.cpio.lzo initramfs_data.cpio.lz4 \ + initramfs_data.cpio # do not try to update files included in initramfs $(deps_initramfs): ; @@ -66,4 +72,3 @@ $(deps_initramfs): klibcdirs $(obj)/initramfs_data.cpio$(suffix_y): $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs $(Q)$(initramfs) -l $(ramfs-input) > $(obj)/.initramfs_data.cpio.d $(call if_changed,initfs) - |