[PATCH] initramfs: handle more than one source dir or file list

Fix bug 7401.

Handle more than one source dir or file list to the initramfs gen scripts.

The Kconfig help for INITRAMFS_SOURCE claims that you can specify multiple
space-separated sources in order to allow unprivileged users to build an
image.  There are two bugs in the current implementation that prevent this
from working.

First, we pass "file1 dir2" to the gen_initramfs_list.sh script, which it
obviously can't open.

Second, gen_initramfs_list.sh -l outputs multiple definitions for
deps_initramfs -- one for each argument.

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Cc: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2 files changed, 3 insertions, 2 deletions

diff --git a/scripts/gen_initramfs_list.sh b/scripts/gen_initramfs_list.sh
index 331c079f029b..4c723fd18648 100644
--- a/scripts/gen_initramfs_list.sh
+++ b/scripts/gen_initramfs_list.sh
@@ -158,7 +158,7 @@ unknown_option() {
 }
 
 list_header() {
-        echo "deps_initramfs := \\"
+        :
 }
 
 header() {
@@ -227,6 +227,7 @@ arg="$1"
 case "$arg" in
         "-l")   # files included in initramfs - used by kbuild
                 dep_list="list_"
+                echo "deps_initramfs := \\"
                 shift
                 ;;
         "-o")   # generate gzipped cpio image named $1
diff --git a/usr/Makefile b/usr/Makefile
index e338e7bedb29..382702ad663b 100644
--- a/usr/Makefile
+++ b/usr/Makefile
@@ -20,7 +20,7 @@ $(obj)/initramfs_data.o: $(obj)/initramfs_data.cpio.gz FORCE
 hostprogs-y := gen_init_cpio
 initramfs   := $(CONFIG_SHELL) $(srctree)/scripts/gen_initramfs_list.sh
 ramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \
-                    $(CONFIG_INITRAMFS_SOURCE),-d)
+                        $(shell echo $(CONFIG_INITRAMFS_SOURCE)),-d)
 ramfs-args  := \
         $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \
         $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID))