Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/g…

…it/lenb/linux-acpi-2.6

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6:
  ACPI EC: remove redundant code
  ACPI: Add D3 cold state
  ACPI: processor: fix processor_physically_present in UP kernel
  ACPI: Split out custom_method functionality into an own driver
  ACPI: Cleanup custom_method debug stuff
  ACPI EC: enable MSI workaround for Quanta laptops
  ACPICA: Update to version 20110413
  ACPICA: Execute an orphan _REG method under the EC device
  ACPICA: Move ACPI_NUM_PREDEFINED_REGIONS to a more appropriate place
  ACPICA: Update internal address SpaceID for DataTable regions
  ACPICA: Add more methods eligible for NULL package element removal
  ACPICA: Split all internal Global Lock functions to new file - evglock
  ACPI: EC: add another DMI check for ASUS hardware
  ACPI EC: remove dead code
  ACPICA: Fix code divergence of global lock handling
  ACPICA: Use acpi_os_create_lock interface
  ACPI: osl, add acpi_os_create_lock interface
  ACPI:Fix goto flows in thermal-sys

Documentation/acpi/method-customizing.txt

@@ -66,3 +66,8 @@ Note: We can use a kernel with multiple custom ACPI method running,
       But each individual write to debugfs can implement a SINGLE
       method override. i.e. if we want to insert/override multiple
       ACPI methods, we need to redo step c) ~ g) for multiple times.
+
+Note: Be aware that root can mis-use this driver to modify arbitrary
+      memory and gain additional rights, if root's privileges got
+      restricted (for example if root is not allowed to load additional
+      modules after boot).

drivers/acpi/Kconfig

@@ -369,6 +369,21 @@ config ACPI_HED
 	  which is used to report some hardware errors notified via
 	  SCI, mainly the corrected errors.
 
+config ACPI_CUSTOM_METHOD
+	tristate "Allow ACPI methods to be inserted/replaced at run time"
+	depends on DEBUG_FS
+	default n
+	help
+	  This debug facility allows ACPI AML methods to me inserted and/or
+	  replaced without rebooting the system. For details refer to:
+	  Documentation/acpi/method-customizing.txt.
+
+	  NOTE: This option is security sensitive, because it allows arbitrary
+	  kernel memory to be written to by root (uid=0) users, allowing them
+	  to bypass certain security measures (e.g. if root is not allowed to
+	  load additional kernel modules after boot, this feature may be used
+	  to override that restriction).
+
 source "drivers/acpi/apei/Kconfig"
 
 endif	# ACPI

drivers/acpi/Makefile

@@ -61,6 +61,7 @@ obj-$(CONFIG_ACPI_SBS)		+= sbshc.o
 obj-$(CONFIG_ACPI_SBS)		+= sbs.o
 obj-$(CONFIG_ACPI_HED)		+= hed.o
 obj-$(CONFIG_ACPI_EC_DEBUGFS)	+= ec_sys.o
+obj-$(CONFIG_ACPI_CUSTOM_METHOD)+= custom_method.o
 
 # processor has its own "processor." module_param namespace
 processor-y			:= processor_driver.o processor_throttling.o

drivers/acpi/acpica/Makefile

@@ -14,7 +14,7 @@ acpi-y := dsfield.o   dsmthdat.o  dsopcode.o  dswexec.o  dswscope.o \
 
 acpi-y += evevent.o  evregion.o  evsci.o    evxfevnt.o \
 	 evmisc.o   evrgnini.o  evxface.o  evxfregn.o \
-	 evgpe.o    evgpeblk.o evgpeinit.o  evgpeutil.o evxfgpe.o
+	 evgpe.o    evgpeblk.o evgpeinit.o  evgpeutil.o evxfgpe.o evglock.o
 
 acpi-y += exconfig.o  exfield.o  exnames.o   exoparg6.o  exresolv.o  exstorob.o\
 	 exconvrt.o  exfldio.o  exoparg1.o  exprep.o    exresop.o   exsystem.o\

drivers/acpi/acpica/acconfig.h

@@ -187,7 +187,6 @@
 
 /* Operation regions */
 
-#define ACPI_NUM_PREDEFINED_REGIONS     9
 #define ACPI_USER_REGION_BEGIN          0x80
 
 /* Maximum space_ids for Operation Regions */

drivers/acpi/acpica/acevents.h

@@ -58,18 +58,23 @@ u32 acpi_ev_fixed_event_detect(void);
  */
 u8 acpi_ev_is_notify_object(struct acpi_namespace_node *node);
 
-acpi_status acpi_ev_acquire_global_lock(u16 timeout);
-
-acpi_status acpi_ev_release_global_lock(void);
-
-acpi_status acpi_ev_init_global_lock_handler(void);
-
 u32 acpi_ev_get_gpe_number_index(u32 gpe_number);
 
 acpi_status
 acpi_ev_queue_notify_request(struct acpi_namespace_node *node,
 			     u32 notify_value);
 
+/*
+ * evglock - Global Lock support
+ */
+acpi_status acpi_ev_init_global_lock_handler(void);
+
+acpi_status acpi_ev_acquire_global_lock(u16 timeout);
+
+acpi_status acpi_ev_release_global_lock(void);
+
+acpi_status acpi_ev_remove_global_lock_handler(void);
+
 /*
  * evgpe - Low-level GPE support
  */

drivers/acpi/acpica/acglobal.h

@@ -214,24 +214,23 @@ ACPI_EXTERN struct acpi_mutex_info acpi_gbl_mutex_info[ACPI_NUM_MUTEX];
 
 /*
  * Global lock mutex is an actual AML mutex object
- * Global lock semaphore works in conjunction with the HW global lock
+ * Global lock semaphore works in conjunction with the actual global lock
+ * Global lock spinlock is used for "pending" handshake
  */
 ACPI_EXTERN union acpi_operand_object *acpi_gbl_global_lock_mutex;
 ACPI_EXTERN acpi_semaphore acpi_gbl_global_lock_semaphore;
+ACPI_EXTERN acpi_spinlock acpi_gbl_global_lock_pending_lock;
 ACPI_EXTERN u16 acpi_gbl_global_lock_handle;
 ACPI_EXTERN u8 acpi_gbl_global_lock_acquired;
 ACPI_EXTERN u8 acpi_gbl_global_lock_present;
+ACPI_EXTERN u8 acpi_gbl_global_lock_pending;
 
 /*
  * Spinlocks are used for interfaces that can be possibly called at
  * interrupt level
  */
-ACPI_EXTERN spinlock_t _acpi_gbl_gpe_lock;	/* For GPE data structs and registers */
-ACPI_EXTERN spinlock_t _acpi_gbl_hardware_lock;	/* For ACPI H/W except GPE registers */
-ACPI_EXTERN spinlock_t _acpi_ev_global_lock_pending_lock; /* For global lock */
-#define acpi_gbl_gpe_lock	&_acpi_gbl_gpe_lock
-#define acpi_gbl_hardware_lock	&_acpi_gbl_hardware_lock
-#define acpi_ev_global_lock_pending_lock &_acpi_ev_global_lock_pending_lock
+ACPI_EXTERN acpi_spinlock acpi_gbl_gpe_lock;	/* For GPE data structs and registers */
+ACPI_EXTERN acpi_spinlock acpi_gbl_hardware_lock;	/* For ACPI H/W except GPE registers */
 
 /*****************************************************************************
  *

drivers/acpi/acpica/amlcode.h

@@ -394,21 +394,6 @@
 #define AML_CLASS_METHOD_CALL       0x09
 #define AML_CLASS_UNKNOWN           0x0A
 
-/* Predefined Operation Region space_iDs */
-
-typedef enum {
-	REGION_MEMORY = 0,
-	REGION_IO,
-	REGION_PCI_CONFIG,
-	REGION_EC,
-	REGION_SMBUS,
-	REGION_CMOS,
-	REGION_PCI_BAR,
-	REGION_IPMI,
-	REGION_DATA_TABLE,	/* Internal use only */
-	REGION_FIXED_HW = 0x7F
-} AML_REGION_TYPES;
-
 /* Comparison operation codes for match_op operator */
 
 typedef enum {

drivers/acpi/acpica/dswload.c

@@ -450,7 +450,7 @@ acpi_status acpi_ds_load1_end_op(struct acpi_walk_state *walk_state)
 			status =
 			    acpi_ex_create_region(op->named.data,
 						  op->named.length,
-						  REGION_DATA_TABLE,
+						  ACPI_ADR_SPACE_DATA_TABLE,
 						  walk_state);
 			if (ACPI_FAILURE(status)) {
 				return_ACPI_STATUS(status);

drivers/acpi/acpica/dswload2.c

@@ -562,7 +562,7 @@ acpi_status acpi_ds_load2_end_op(struct acpi_walk_state *walk_state)
 				    ((op->common.value.arg)->common.value.
 				     integer);
 			} else {
-				region_space = REGION_DATA_TABLE;
+				region_space = ACPI_ADR_SPACE_DATA_TABLE;
 			}
 
 			/*