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path: root/drivers/acpi/debugfs.c
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Diffstat (limited to 'drivers/acpi/debugfs.c')
-rw-r--r--drivers/acpi/debugfs.c92
1 files changed, 4 insertions, 88 deletions
diff --git a/drivers/acpi/debugfs.c b/drivers/acpi/debugfs.c
index 384f7abcff77..182a9fc36355 100644
--- a/drivers/acpi/debugfs.c
+++ b/drivers/acpi/debugfs.c
@@ -3,100 +3,16 @@
*/
#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/uaccess.h>
#include <linux/debugfs.h>
#include <acpi/acpi_drivers.h>
#define _COMPONENT ACPI_SYSTEM_COMPONENT
ACPI_MODULE_NAME("debugfs");
+struct dentry *acpi_debugfs_dir;
+EXPORT_SYMBOL_GPL(acpi_debugfs_dir);
-/* /sys/modules/acpi/parameters/aml_debug_output */
-
-module_param_named(aml_debug_output, acpi_gbl_enable_aml_debug_object,
- bool, 0644);
-MODULE_PARM_DESC(aml_debug_output,
- "To enable/disable the ACPI Debug Object output.");
-
-/* /sys/kernel/debug/acpi/custom_method */
-
-static ssize_t cm_write(struct file *file, const char __user * user_buf,
- size_t count, loff_t *ppos)
+void __init acpi_debugfs_init(void)
{
- static char *buf;
- static u32 max_size;
- static u32 uncopied_bytes;
-
- struct acpi_table_header table;
- acpi_status status;
-
- if (!(*ppos)) {
- /* parse the table header to get the table length */
- if (count <= sizeof(struct acpi_table_header))
- return -EINVAL;
- if (copy_from_user(&table, user_buf,
- sizeof(struct acpi_table_header)))
- return -EFAULT;
- uncopied_bytes = max_size = table.length;
- buf = kzalloc(max_size, GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
- }
-
- if (buf == NULL)
- return -EINVAL;
-
- if ((*ppos > max_size) ||
- (*ppos + count > max_size) ||
- (*ppos + count < count) ||
- (count > uncopied_bytes))
- return -EINVAL;
-
- if (copy_from_user(buf + (*ppos), user_buf, count)) {
- kfree(buf);
- buf = NULL;
- return -EFAULT;
- }
-
- uncopied_bytes -= count;
- *ppos += count;
-
- if (!uncopied_bytes) {
- status = acpi_install_method(buf);
- kfree(buf);
- buf = NULL;
- if (ACPI_FAILURE(status))
- return -EINVAL;
- add_taint(TAINT_OVERRIDDEN_ACPI_TABLE);
- }
-
- return count;
-}
-
-static const struct file_operations cm_fops = {
- .write = cm_write,
- .llseek = default_llseek,
-};
-
-int __init acpi_debugfs_init(void)
-{
- struct dentry *acpi_dir, *cm_dentry;
-
- acpi_dir = debugfs_create_dir("acpi", NULL);
- if (!acpi_dir)
- goto err;
-
- cm_dentry = debugfs_create_file("custom_method", S_IWUSR,
- acpi_dir, NULL, &cm_fops);
- if (!cm_dentry)
- goto err;
-
- return 0;
-
-err:
- if (acpi_dir)
- debugfs_remove(acpi_dir);
- return -EINVAL;
+ acpi_debugfs_dir = debugfs_create_dir("acpi", NULL);
}