path: root/usr
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authorFlorian Fainelli <f.fainelli@gmail.com>2017-11-02 15:59:44 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-11-03 07:39:19 -0700
commite08b1877452a0055c65f6394163ce5a0fbd720a3 (patch)
tree2ab068c535f00a7a6f53f7adfab5e1d08c944805 /usr
parentab615a5b879292e83653be60aa82113f7c6f462d (diff)
initramfs: fix initramfs rebuilds w/ compression after disabling
This is a follow-up to commit 57ddfdaa9a72 ("initramfs: fix disabling of initramfs (and its compression)"). This particular commit fixed the use case where we build the kernel with an initramfs with no compression, and then we build the kernel with no initramfs. Now this still left us with the same case as described here: http://lkml.kernel.org/r/20170521033337.6197-1-f.fainelli@gmail.com not working with initramfs compression. This can be seen by the following steps/timestamps: https://www.spinics.net/lists/kernel/msg2598153.html .initramfs_data.cpio.gz.cmd is correct: cmd_usr/initramfs_data.cpio.gz := /bin/bash ./scripts/gen_initramfs_list.sh -o usr/initramfs_data.cpio.gz -u 1000 -g 1000 /home/fainelli/work/uclinux-rootfs/romfs /home/fainelli/work/uclinux-rootfs/misc/initramfs.dev and was generated the first time we did generate the gzip initramfs, so the command has not changed, nor its arguments, so we just don't call it, no initramfs cpio is re-generated as a consequence. The fix for this problem is just to properly keep track of the .initramfs_cpio_data.d file by suffixing it with the compression extension. This takes care of properly tracking dependencies such that the initramfs get (re)generated any time files are added/deleted etc. Link: http://lkml.kernel.org/r/20170930033936.6722-1-f.fainelli@gmail.com Fixes: db2aa7fd15e8 ("initramfs: allow again choice of the embedded initramfs compression algorithm") Fixes: 9e3596b0c653 ("kbuild: initramfs cleanup, set target from Kconfig") Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Cc: "Francisco Blas Izquierdo Riera (klondike)" <klondike@xiscosoft.net> Cc: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'usr')
1 files changed, 5 insertions, 4 deletions
diff --git a/usr/Makefile b/usr/Makefile
index 34a9fcd0f537..237a028693ce 100644
--- a/usr/Makefile
+++ b/usr/Makefile
@@ -8,6 +8,7 @@ PHONY += klibcdirs
suffix_y = $(subst $\",,$(CONFIG_INITRAMFS_COMPRESSION))
datafile_y = initramfs_data.cpio$(suffix_y)
+datafile_d_y = .$(datafile_y).d
AFLAGS_initramfs_data.o += -DINITRAMFS_IMAGE="usr/$(datafile_y)"
@@ -30,12 +31,12 @@ ramfs-args := \
-# .initramfs_data.cpio.d is used to identify all files included
+# $(datafile_d_y) is used to identify all files included
# in initramfs and to detect if any files are added/removed.
# Removed files are identified by directory timestamp being updated
# The dependency list is generated by gen_initramfs.sh -l
-ifneq ($(wildcard $(obj)/.initramfs_data.cpio.d),)
- include $(obj)/.initramfs_data.cpio.d
+ifneq ($(wildcard $(obj)/$(datafile_d_y)),)
+ include $(obj)/$(datafile_d_y)
quiet_cmd_initfs = GEN $@
@@ -53,5 +54,5 @@ $(deps_initramfs): klibcdirs
# 3) If gen_init_cpio are newer than initramfs_data.cpio
# 4) arguments to gen_initramfs.sh changes
$(obj)/$(datafile_y): $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs
- $(Q)$(initramfs) -l $(ramfs-input) > $(obj)/.initramfs_data.cpio.d
+ $(Q)$(initramfs) -l $(ramfs-input) > $(obj)/$(datafile_d_y)
$(call if_changed,initfs)