diff options
| -rw-r--r-- | Documentation/acpi/dsdt-override.txt | 12 | ||||
| -rwxr-xr-x | Documentation/acpi/initramfs-add-dsdt.sh | 43 | ||||
| -rw-r--r-- | Documentation/kernel-parameters.txt | 3 | ||||
| -rw-r--r-- | drivers/acpi/Kconfig | 11 | ||||
| -rw-r--r-- | drivers/acpi/osl.c | 84 | ||||
| -rw-r--r-- | init/initramfs.c | 8 | ||||
| -rw-r--r-- | init/main.c | 7 |
7 files changed, 3 insertions, 165 deletions
diff --git a/Documentation/acpi/dsdt-override.txt b/Documentation/acpi/dsdt-override.txt index 5008f256a2db..febbb1ba4d23 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: http://www.lesswatts.org/projects/acpi/overridingDSDT.php - -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 17ef6e838e14..000000000000 --- a/Documentation/acpi/initramfs-add-dsdt.sh +++ /dev/null @@ -1,43 +0,0 @@ -#!/bin/bash -# 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: $program_name initrd-name.img DSDT-to-add.aml -Adds a DSDT file to an initrd (in initramfs format) - - initrd-name.img: filename of the initrd in initramfs format - DSDT-to-add.aml: filename of the DSDT file to add - " 1>&2 - exit 1 -fi - -# we should check it's an initramfs - -tempcpio=$(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 49318b99e581..622f7849edb9 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" diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig index fbcaa069be86..b4f5e8542829 100644 --- a/drivers/acpi/Kconfig +++ b/drivers/acpi/Kconfig @@ -300,17 +300,6 @@ config ACPI_CUSTOM_DSDT bool default ACPI_CUSTOM_DSDT_FILE != "" -config ACPI_CUSTOM_DSDT_INITRD - bool "Read Custom DSDT from initramfs" - depends on BLK_DEV_INITRD - default n - help - This option supports a custom DSDT by optionally loading it from initrd. - See Documentation/acpi/dsdt-override.txt - - If you are not using this feature now, but may use it later, - it is safe to say Y here. - config ACPI_BLACKLIST_YEAR int "Disable ACPI for systems before Jan 1st this year" if X86_32 default 0 diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c index 065819ba87c7..a697fb6cf050 100644 --- a/drivers/acpi/osl.c +++ b/drivers/acpi/osl.c @@ -91,10 +91,6 @@ static DEFINE_SPINLOCK(acpi_res_lock); #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */ static char osi_additional_string[OSI_STRING_LENGTH_MAX]; -#ifdef CONFIG_ACPI_CUSTOM_DSDT_INITRD -static int acpi_no_initrd_override; -#endif - /* * "Ode to _OSI(Linux)" * @@ -324,67 +320,6 @@ acpi_os_predefined_override(const struct acpi_predefined_names *init_val, return AE_OK; } -#ifdef CONFIG_ACPI_CUSTOM_DSDT_INITRD -static struct acpi_table_header *acpi_find_dsdt_initrd(void) -{ - struct file *firmware_file; - mm_segment_t oldfs; - unsigned long len, len2; - struct acpi_table_header *dsdt_buffer, *ret = NULL; - struct kstat stat; - char *ramfs_dsdt_name = "/DSDT.aml"; - - printk(KERN_INFO PREFIX "Checking initramfs for custom DSDT\n"); - - /* - * Never do this at home, only the user-space is allowed to open a file. - * The clean way would be to use the firmware loader. - * But this code must be run before there is any userspace available. - * A static/init firmware infrastructure doesn't exist yet... - */ - if (vfs_stat(ramfs_dsdt_name, &stat) < 0) - return ret; - - len = stat.size; - /* check especially against empty files */ - if (len <= 4) { - printk(KERN_ERR PREFIX "Failed: DSDT only %lu bytes.\n", len); - return ret; - } - - firmware_file = filp_open(ramfs_dsdt_name, O_RDONLY, 0); - if (IS_ERR(firmware_file)) { - printk(KERN_ERR PREFIX "Failed to open %s.\n", ramfs_dsdt_name); - return ret; - } - - dsdt_buffer = kmalloc(len, GFP_ATOMIC); - if (!dsdt_buffer) { - printk(KERN_ERR PREFIX "Failed to allocate %lu bytes.\n", len); - goto err; - } - - oldfs = get_fs(); - set_fs(KERNEL_DS); - len2 = vfs_read(firmware_file, (char __user *)dsdt_buffer, len, - &firmware_file->f_pos); - set_fs(oldfs); - if (len2 < len) { - printk(KERN_ERR PREFIX "Failed to read %lu bytes from %s.\n", - len, ramfs_dsdt_name); - ACPI_FREE(dsdt_buffer); - goto err; - } - - printk(KERN_INFO PREFIX "Found %lu byte DSDT in %s.\n", - len, ramfs_dsdt_name); - ret = dsdt_buffer; -err: - filp_close(firmware_file, NULL); - return ret; -} -#endif - acpi_status acpi_os_table_override(struct acpi_table_header * existing_table, struct acpi_table_header ** new_table) @@ -398,16 +333,6 @@ acpi_os_table_override(struct acpi_table_header * existing_table, if (strncmp(existing_table->signature, "DSDT", 4) == 0) *new_table = (struct acpi_table_header *)AmlCode; #endif -#ifdef CONFIG_ACPI_CUSTOM_DSDT_INITRD - if ((strncmp(existing_table->signature, "DSDT", 4) == 0) && - !acpi_no_initrd_override) { - struct acpi_table_header *initrd_table; - - initrd_table = acpi_find_dsdt_initrd(); - if (initrd_table) - *new_table = initrd_table; - } -#endif if (*new_table != NULL) { printk(KERN_WARNING PREFIX "Override [%4.4s-%8.8s], " "this is unsafe: tainting kernel\n", @@ -418,15 +343,6 @@ acpi_os_table_override(struct acpi_table_header * existing_table, return AE_OK; } -#ifdef CONFIG_ACPI_CUSTOM_DSDT_INITRD -static int __init acpi_no_initrd_override_setup(char *s) -{ - acpi_no_initrd_override = 1; - return 1; -} -__setup("acpi_no_initrd_override", acpi_no_initrd_override_setup); -#endif - static irqreturn_t acpi_irq(int irq, void *dev_id) { u32 handled; diff --git a/init/initramfs.c b/init/initramfs.c index c0b1e0533d80..d53fee8d8604 100644 --- a/init/initramfs.c +++ b/init/initramfs.c @@ -538,7 +538,7 @@ skip: initrd_end = 0; } -int __init populate_rootfs(void) +static int __init populate_rootfs(void) { char *err = unpack_to_rootfs(__initramfs_start, __initramfs_end - __initramfs_start, 0); @@ -577,10 +577,4 @@ int __init populate_rootfs(void) } return 0; } -#ifndef CONFIG_ACPI_CUSTOM_DSDT_INITRD -/* - * if this option is enabled, populate_rootfs() is called _earlier_ in the - * boot sequence. This insures that the ACPI initialisation can find the file. - */ rootfs_initcall(populate_rootfs); -#endif diff --git a/init/main.c b/init/main.c index fbb0167c6b8a..99ce94930b09 100644 --- a/init/main.c +++ b/init/main.c @@ -102,12 +102,6 @@ static inline void mark_rodata_ro(void) { } extern void tc_init(void); #endif -#ifdef CONFIG_ACPI_CUSTOM_DSDT_INITRD -extern int populate_rootfs(void); -#else -static inline void populate_rootfs(void) {} -#endif - enum system_states system_state; EXPORT_SYMBOL(system_state); @@ -650,7 +644,6 @@ asmlinkage void __init start_kernel(void) check_bugs(); - populate_rootfs(); /* For DSDT override from initramfs */ acpi_early_init(); /* before LAPIC and SMP init */ /* Do the rest non-__init'ed, we're now alive */ |
