path: root/Documentation
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authorLinus Torvalds <torvalds@linux-foundation.org>2008-03-15 11:53:32 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-03-15 11:58:04 -0700
commit9a9e0d685553af76cb6ae2af93cca4913e7fcd47 (patch)
treec4f041b0f7fa28db46841336135d493d587435ea /Documentation
parentce636452343af0522d2666157dab9c2096f4f996 (diff)
This essentially reverts commit 71fc47a9adf8ee89e5c96a47222915c5485ac437 ("ACPI: basic initramfs DSDT override support"), because the code simply isn't ready. It did ugly things to the init sequence to populate the rootfs image early, but that just ended up showing other problems with the whole approach. The fact is, the VFS layer simply isn't initialized this early, and the relevant ACPI code should either run much later, or this shouldn't be done at all. For 2.6.25, we'll just pick the latter option. We can revisit this concept later if necessary. Cc: Dave Hansen <haveblue@us.ibm.com> Cc: Tilman Schmidt <tilman@imap.cc> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Thomas Renninger <trenn@suse.de> Cc: Eric Piel <eric.piel@tremplin-utc.net> Cc: Len Brown <len.brown@intel.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Markus Gaugusch <dsdt@gaugusch.at> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation')
3 files changed, 2 insertions, 56 deletions
diff --git a/Documentation/acpi/dsdt-override.txt b/Documentation/acpi/dsdt-override.txt
index 5008f256a2d..febbb1ba4d2 100644
--- a/Documentation/acpi/dsdt-override.txt
+++ b/Documentation/acpi/dsdt-override.txt
@@ -1,15 +1,7 @@
-Linux supports two methods of overriding the BIOS DSDT:
+Linux supports a method of overriding the BIOS DSDT:
CONFIG_ACPI_CUSTOM_DSDT builds the image into the kernel.
-CONFIG_ACPI_CUSTOM_DSDT_INITRD adds the image to the initrd.
-When to use these methods is described in detail on the
+When to use this method is described in detail on the
Linux/ACPI home page:
-Note that if both options are used, the DSDT supplied
-by the INITRD method takes precedence.
-Documentation/initramfs-add-dsdt.sh is provided for convenience
-for use with the CONFIG_ACPI_CUSTOM_DSDT_INITRD method.
diff --git a/Documentation/acpi/initramfs-add-dsdt.sh b/Documentation/acpi/initramfs-add-dsdt.sh
deleted file mode 100755
index 17ef6e838e1..00000000000
--- a/Documentation/acpi/initramfs-add-dsdt.sh
+++ /dev/null
@@ -1,43 +0,0 @@
-# Adds a DSDT file to the initrd (if it's an initramfs)
-# first argument is the name of archive
-# second argument is the name of the file to add
-# The file will be copied as /DSDT.aml
-# 20060126: fix "Premature end of file" with some old cpio (Roland Robic)
-# 20060205: this time it should really work
-# check the arguments
-if [ $# -ne 2 ]; then
- program_name=$(basename $0)
- echo "\
-$program_name: too few arguments
-Usage: $program_name initrd-name.img DSDT-to-add.aml
-Adds a DSDT file to an initrd (in initramfs format)
- initrd-name.img: filename of the initrd in initramfs format
- DSDT-to-add.aml: filename of the DSDT file to add
- " 1>&2
- exit 1
-# we should check it's an initramfs
-tempcpio=$(mktemp -d)
-# cleanup on exit, hangup, interrupt, quit, termination
-trap 'rm -rf $tempcpio' 0 1 2 3 15
-# extract the archive
-gunzip -c "$1" > "$tempcpio"/initramfs.cpio || exit 1
-# copy the DSDT file at the root of the directory so that we can call it "/DSDT.aml"
-cp -f "$2" "$tempcpio"/DSDT.aml
-# add the file
-cd "$tempcpio"
-(echo DSDT.aml | cpio --quiet -H newc -o -A -O "$tempcpio"/initramfs.cpio) || exit 1
-cd "$OLDPWD"
-# re-compress the archive
-gzip -c "$tempcpio"/initramfs.cpio > "$1"
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 49318b99e58..622f7849edb 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -177,9 +177,6 @@ and is between 256 and 4096 characters. It is defined in the file
acpi_no_auto_ssdt [HW,ACPI] Disable automatic loading of SSDT
- acpi_no_initrd_override [KNL,ACPI]
- Disable loading custom ACPI tables from the initramfs
acpi_os_name= [HW,ACPI] Tell ACPI BIOS the name of the OS
Format: To spoof as Windows 98: ="Microsoft Windows"