Introduce drivers/acpi/debugfs.c.
Code for ACPI debugfs I/F, i.e. /sys/kernel/debug/acpi/custom_method,
is moved to this file.
And make ACPI debugfs always built in,
even if CONFIG_ACPI_DEBUG is cleared.
Signed-off-by: Zhang Rui <rui.zhang@xxxxxxxxx>
---
drivers/acpi/Makefile | 2
drivers/acpi/bus.c | 2
drivers/acpi/debug.c | 97 ------------------------------------------------
drivers/acpi/debugfs.c | 84 +++++++++++++++++++++++++++++++++++++++++
drivers/acpi/internal.h | 6 +-
5 files changed, 89 insertions(+), 102 deletions(-)
Index: linux-2.6/drivers/acpi/debug.c
===================================================================
--- linux-2.6.orig/drivers/acpi/debug.c
+++ /dev/null
@@ -1,97 +0,0 @@
-/*
- * debug.c - ACPI debug interface to userspace.
- */
-
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/moduleparam.h>
-#include <linux/debugfs.h>
-#include <linux/slab.h>
-#include <asm/uaccess.h>
-#include <acpi/acpi_drivers.h>
-
-#define _COMPONENT ACPI_SYSTEM_COMPONENT
-ACPI_MODULE_NAME("debug");
-
-/* --------------------------------------------------------------------------
- DebugFS Interface
- -------------------------------------------------------------------------- */
-
-static ssize_t cm_write(struct file *file, const char __user *user_buf,
- size_t count, loff_t *ppos)
-{
- static char *buf;
- static int 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 = table.length;
- buf = kzalloc(uncopied_bytes, GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
- }
-
- if (uncopied_bytes < count) {
- kfree(buf);
- return -EINVAL;
- }
-
- if (copy_from_user(buf + (*ppos), user_buf, count)) {
- kfree(buf);
- return -EFAULT;
- }
-
- uncopied_bytes -= count;
- *ppos += count;
-
- if (!uncopied_bytes) {
- status = acpi_install_method(buf);
- kfree(buf);
- if (ACPI_FAILURE(status))
- return -EINVAL;
- add_taint(TAINT_OVERRIDDEN_ACPI_TABLE);
- }
-
- return count;
-}
-
-static const struct file_operations cm_fops = {
- .write = cm_write,
-};
-
-static int 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_IWUGO,
- acpi_dir, NULL, &cm_fops);
- if (!cm_dentry)
- goto err;
-
- return 0;
-
-err:
- if (acpi_dir)
- debugfs_remove(acpi_dir);
- return -EINVAL;
-}
-
-int __init acpi_debug_init(void)
-{
- acpi_debugfs_init();
- return 0;
-}
Index: linux-2.6/drivers/acpi/debugfs.c
===================================================================
--- /dev/null
+++ linux-2.6/drivers/acpi/debugfs.c
@@ -0,0 +1,84 @@
+/*
+ * debugfs.c - ACPI debugfs interface to userspace.
+ */
+
+#include <linux/module.h>
+#include <linux/debugfs.h>
+#include <acpi/acpi_drivers.h>
+
+#define _COMPONENT ACPI_SYSTEM_COMPONENT
+ACPI_MODULE_NAME("debugfs");
+
+/* --------------------------------------------------------------------------
+ DebugFS Interface
+ -------------------------------------------------------------------------- */
+
+static ssize_t cm_write(struct file *file, const char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ static char *buf;
+ static int 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 = table.length;
+ buf = kzalloc(uncopied_bytes, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+ }
+
+ if (uncopied_bytes < count) {
+ kfree(buf);
+ return -EINVAL;
+ }
+
+ if (copy_from_user(buf + (*ppos), user_buf, count)) {
+ kfree(buf);
+ return -EFAULT;
+ }
+
+ uncopied_bytes -= count;
+ *ppos += count;
+
+ if (!uncopied_bytes) {
+ status = acpi_install_method(buf);
+ kfree(buf);
+ if (ACPI_FAILURE(status))
+ return -EINVAL;
+ add_taint(TAINT_OVERRIDDEN_ACPI_TABLE);
+ }
+
+ return count;
+}
+
+static const struct file_operations cm_fops = {
+ .write = cm_write,
+};
+
+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_IWUGO,
+ acpi_dir, NULL, &cm_fops);
+ if (!cm_dentry)
+ goto err;
+
+ return 0;
+
+err:
+ if (acpi_dir)
+ debugfs_remove(acpi_dir);
+ return -EINVAL;
+}
Index: linux-2.6/drivers/acpi/Makefile
===================================================================
--- linux-2.6.orig/drivers/acpi/Makefile
+++ linux-2.6/drivers/acpi/Makefile
@@ -39,7 +39,7 @@ acpi-y += pci_root.o pci_link.o pci_i
acpi-y += power.o
acpi-y += event.o
acpi-y += sysfs.o
-acpi-$(CONFIG_ACPI_DEBUG) += debug.o
+acpi-$(CONFIG_DEBUG_FS) += debugfs.o
acpi-$(CONFIG_ACPI_NUMA) += numa.o
acpi-$(CONFIG_ACPI_PROCFS_POWER) += cm_sbs.o
ifdef CONFIG_ACPI_VIDEO
Index: linux-2.6/drivers/acpi/internal.h
===================================================================
--- linux-2.6.orig/drivers/acpi/internal.h
+++ linux-2.6/drivers/acpi/internal.h
@@ -24,10 +24,10 @@ int init_acpi_device_notify(void);
int acpi_scan_init(void);
int acpi_sysfs_init(void);
-#ifdef CONFIG_ACPI_DEBUG
-int acpi_debug_init(void);
+#ifdef CONFIG_DEBUG_FS
+int acpi_debugfs_init(void);
#else
-static inline int acpi_debug_init(void) { return 0; }
+static inline int acpi_debugfs_init(void) { return 0; }
#endif
/* --------------------------------------------------------------------------
Index: linux-2.6/drivers/acpi/bus.c
===================================================================
--- linux-2.6.orig/drivers/acpi/bus.c
+++ linux-2.6/drivers/acpi/bus.c
@@ -1035,7 +1035,7 @@ static int __init acpi_init(void)
acpi_ec_init();
acpi_power_init();
acpi_sysfs_init();
- acpi_debug_init();
+ acpi_debugfs_init();
acpi_sleep_proc_init();
acpi_wakeup_device_init();
return result;
--
To unsubscribe from this list: send the line "unsubscribe linux-acpi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
