Merge tag 'v3.6-rc3' into staging/for_v3.7

Linux 3.6-rc3

* tag 'v3.6-rc3': (764 commits)
  Linux 3.6-rc3
  task_work: add a scheduling point in task_work_run()
  fs: fix fs/namei.c kernel-doc warnings
  eventpoll: use-after-possible-free in epoll_create1()
  vfio: grab vfio_device reference *before* exposing the sucker via fd_install()
  vfio: get rid of vfio_device_put()/vfio_group_get_device* races
  vfio: get rid of open-coding kref_put_mutex
  introduce kref_put_mutex()
  vfio: don't dereference after kfree...
  fbcon: fix race condition between console lock and cursor timer (v1.1)
  mm: compaction: Abort async compaction if locks are contended or taking too long
  mm: have order > 0 compaction start near a pageblock with free pages
  rapidio/tsi721: fix unused variable compiler warning
  rapidio/tsi721: fix inbound doorbell interrupt handling
  drivers/rtc/rtc-rs5c348.c: fix hour decoding in 12-hour mode
  mm: correct page->pfmemalloc to fix deactivate_slab regression
  drivers/rtc/rtc-pcf2123.c: initialize dynamic sysfs attributes
  mm/compaction.c: fix deferring compaction mistake
  drivers/misc/sgi-xp/xpc_uv.c: SGI XPC fails to load when cpu 0 is out of IRQ resources
  string: do not export memweight() to userspace
  ...

Documentation/ABI/testing/sysfs-platform-ideapad-laptop

@@ -5,4 +5,15 @@ Contact:	"Ike Panhc <ike.pan@canonical.com>"
 Description:
 		Control the power of camera module. 1 means on, 0 means off.
 
+What:		/sys/devices/platform/ideapad/fan_mode
+Date:		June 2012
+KernelVersion:	3.6
+Contact:	"Maxim Mikityanskiy <maxtram95@gmail.com>"
+Description:
+		Change fan mode
+		There are four available modes:
+			* 0 -> Super Silent Mode
+			* 1 -> Standard Mode
+			* 2 -> Dust Cleaning
+			* 4 -> Efficient Thermal Dissipation Mode
 

Documentation/DocBook/filesystems.tmpl

@@ -224,8 +224,8 @@ all your transactions.
 </para>
 
 <para>
-Then at umount time , in your put_super() (2.4) or write_super() (2.5)
-you can then call journal_destroy() to clean up your in-core journal object.
+Then at umount time , in your put_super() you can then call journal_destroy()
+to clean up your in-core journal object.
 </para>
 
 <para>

Documentation/DocBook/media/v4l/vidioc-g-tuner.xml

@@ -125,7 +125,7 @@ the structure refers to a radio tuner the
 <constant>V4L2_TUNER_CAP_NORM</constant> flags can't be used.</para>
 <para>If multiple frequency bands are supported, then
 <structfield>capability</structfield> is the union of all
-<structfield>capability></structfield> fields of each &v4l2-frequency-band;.
+<structfield>capability</structfield> fields of each &v4l2-frequency-band;.
 </para></entry>
 	  </row>
 	  <row>

Documentation/devicetree/bindings/regulator/tps6586x.txt

@@ -9,9 +9,9 @@ Required properties:
 - regulators: list of regulators provided by this controller, must have
   property "regulator-compatible" to match their hardware counterparts:
   sm[0-2], ldo[0-9] and ldo_rtc
-- sm0-supply: The input supply for the SM0.
-- sm1-supply: The input supply for the SM1.
-- sm2-supply: The input supply for the SM2.
+- vin-sm0-supply: The input supply for the SM0.
+- vin-sm1-supply: The input supply for the SM1.
+- vin-sm2-supply: The input supply for the SM2.
 - vinldo01-supply: The input supply for the LDO1 and LDO2
 - vinldo23-supply: The input supply for the LDO2 and LDO3
 - vinldo4-supply: The input supply for the LDO4
@@ -30,9 +30,9 @@ Example:
 		#gpio-cells = <2>;
 		gpio-controller;
 
-		sm0-supply = <&some_reg>;
-		sm1-supply = <&some_reg>;
-		sm2-supply = <&some_reg>;
+		vin-sm0-supply = <&some_reg>;
+		vin-sm1-supply = <&some_reg>;
+		vin-sm2-supply = <&some_reg>;
 		vinldo01-supply = <...>;
 		vinldo23-supply = <...>;
 		vinldo4-supply = <...>;

Documentation/filesystems/Locking

@@ -114,7 +114,6 @@ prototypes:
 	int (*drop_inode) (struct inode *);
 	void (*evict_inode) (struct inode *);
 	void (*put_super) (struct super_block *);
-	void (*write_super) (struct super_block *);
 	int (*sync_fs)(struct super_block *sb, int wait);
 	int (*freeze_fs) (struct super_block *);
 	int (*unfreeze_fs) (struct super_block *);
@@ -136,7 +135,6 @@ write_inode:
 drop_inode:				!!!inode->i_lock!!!
 evict_inode:
 put_super:		write
-write_super:		read
 sync_fs:		read
 freeze_fs:		write
 unfreeze_fs:		write

Documentation/filesystems/porting

@@ -94,9 +94,8 @@ protected.
 ---
 [mandatory]
 
-BKL is also moved from around sb operations.  ->write_super() Is now called 
-without BKL held.  BKL should have been shifted into individual fs sb_op
-functions.  If you don't need it, remove it.  
+BKL is also moved from around sb operations. BKL should have been shifted into
+individual fs sb_op functions.  If you don't need it, remove it.
 
 ---
 [informational]

Documentation/filesystems/vfat.txt

@@ -137,6 +137,17 @@ errors=panic|continue|remount-ro
 		 without doing anything or remount the partition in
 		 read-only mode (default behavior).
 
+discard       -- If set, issues discard/TRIM commands to the block
+		 device when blocks are freed. This is useful for SSD devices
+		 and sparse/thinly-provisoned LUNs.
+
+nfs           -- This option maintains an index (cache) of directory
+		 inodes by i_logstart which is used by the nfs-related code to
+		 improve look-ups.
+
+		 Enable this only if you want to export the FAT filesystem
+		 over NFS
+
 <bool>: 0,1,yes,no,true,false
 
 TODO

Documentation/filesystems/vfs.txt

@@ -216,7 +216,6 @@ struct super_operations {
         void (*drop_inode) (struct inode *);
         void (*delete_inode) (struct inode *);
         void (*put_super) (struct super_block *);
-        void (*write_super) (struct super_block *);
         int (*sync_fs)(struct super_block *sb, int wait);
         int (*freeze_fs) (struct super_block *);
         int (*unfreeze_fs) (struct super_block *);
@@ -273,9 +272,6 @@ or bottom half).
   put_super: called when the VFS wishes to free the superblock
 	(i.e. unmount). This is called with the superblock lock held
 
-  write_super: called when the VFS superblock needs to be written to
-	disc. This method is optional
-
   sync_fs: called when VFS is writing out all dirty data associated with
   	a superblock. The second parameter indicates whether the method
 	should wait until the write out has been completed. Optional.

Documentation/laptops/laptop-mode.txt

@@ -262,9 +262,9 @@ MINIMUM_BATTERY_MINUTES=10
 
 #
 # Allowed dirty background ratio, in percent.  Once DIRTY_RATIO has been
-# exceeded, the kernel will wake pdflush which will then reduce the amount
-# of dirty memory to dirty_background_ratio.  Set this nice and low, so once
-# some writeout has commenced, we do a lot of it.
+# exceeded, the kernel will wake flusher threads which will then reduce the
+# amount of dirty memory to dirty_background_ratio.  Set this nice and low,
+# so once some writeout has commenced, we do a lot of it.
 #
 #DIRTY_BACKGROUND_RATIO=5
 
@@ -384,9 +384,9 @@ CPU_MAXFREQ=${CPU_MAXFREQ:-'slowest'}
 
 #
 # Allowed dirty background ratio, in percent.  Once DIRTY_RATIO has been
-# exceeded, the kernel will wake pdflush which will then reduce the amount
-# of dirty memory to dirty_background_ratio.  Set this nice and low, so once
-# some writeout has commenced, we do a lot of it.
+# exceeded, the kernel will wake flusher threads which will then reduce the
+# amount of dirty memory to dirty_background_ratio.  Set this nice and low,
+# so once some writeout has commenced, we do a lot of it.
 #
 DIRTY_BACKGROUND_RATIO=${DIRTY_BACKGROUND_RATIO:-'5'}
 

Documentation/networking/netconsole.txt

@@ -51,8 +51,23 @@ Built-in netconsole starts immediately after the TCP stack is
 initialized and attempts to bring up the supplied dev at the supplied
 address.
 
-The remote host can run either 'netcat -u -l -p <port>',
-'nc -l -u <port>' or syslogd.
+The remote host has several options to receive the kernel messages,
+for example:
+
+1) syslogd
+
+2) netcat
+
+   On distributions using a BSD-based netcat version (e.g. Fedora,
+   openSUSE and Ubuntu) the listening port must be specified without
+   the -p switch:
+
+   'nc -u -l -p <port>' / 'nc -u -l <port>' or
+   'netcat -u -l -p <port>' / 'netcat -u -l <port>'
+
+3) socat
+
+   'socat udp-recv:<port> -'
 
 Dynamic reconfiguration:
 ========================

Documentation/pinctrl.txt

@@ -840,9 +840,9 @@ static unsigned long i2c_pin_configs[] = {
 
 static struct pinctrl_map __initdata mapping[] = {
 	PIN_MAP_MUX_GROUP("foo-i2c.0", PINCTRL_STATE_DEFAULT, "pinctrl-foo", "i2c0", "i2c0"),
-	PIN_MAP_MUX_CONFIGS_GROUP("foo-i2c.0", PINCTRL_STATE_DEFAULT, "pinctrl-foo", "i2c0", i2c_grp_configs),
-	PIN_MAP_MUX_CONFIGS_PIN("foo-i2c.0", PINCTRL_STATE_DEFAULT, "pinctrl-foo", "i2c0scl", i2c_pin_configs),
-	PIN_MAP_MUX_CONFIGS_PIN("foo-i2c.0", PINCTRL_STATE_DEFAULT, "pinctrl-foo", "i2c0sda", i2c_pin_configs),
+	PIN_MAP_CONFIGS_GROUP("foo-i2c.0", PINCTRL_STATE_DEFAULT, "pinctrl-foo", "i2c0", i2c_grp_configs),
+	PIN_MAP_CONFIGS_PIN("foo-i2c.0", PINCTRL_STATE_DEFAULT, "pinctrl-foo", "i2c0scl", i2c_pin_configs),
+	PIN_MAP_CONFIGS_PIN("foo-i2c.0", PINCTRL_STATE_DEFAULT, "pinctrl-foo", "i2c0sda", i2c_pin_configs),
 };
 
 Finally, some devices expect the mapping table to contain certain specific

Documentation/security/Yama.txt

@@ -46,27 +46,27 @@ restrictions, it can call prctl(PR_SET_PTRACER, PR_SET_PTRACER_ANY, ...)
 so that any otherwise allowed process (even those in external pid namespaces)
 may attach.
 
-These restrictions do not change how ptrace via PTRACE_TRACEME operates.
-
-The sysctl settings are:
+The sysctl settings (writable only with CAP_SYS_PTRACE) are:
 
 0 - classic ptrace permissions: a process can PTRACE_ATTACH to any other
     process running under the same uid, as long as it is dumpable (i.e.
     did not transition uids, start privileged, or have called
-    prctl(PR_SET_DUMPABLE...) already).
+    prctl(PR_SET_DUMPABLE...) already). Similarly, PTRACE_TRACEME is
+    unchanged.
 
 1 - restricted ptrace: a process must have a predefined relationship
     with the inferior it wants to call PTRACE_ATTACH on. By default,
     this relationship is that of only its descendants when the above
     classic criteria is also met. To change the relationship, an
     inferior can call prctl(PR_SET_PTRACER, debugger, ...) to declare
     an allowed debugger PID to call PTRACE_ATTACH on the inferior.
+    Using PTRACE_TRACEME is unchanged.
 
 2 - admin-only attach: only processes with CAP_SYS_PTRACE may use ptrace
-    with PTRACE_ATTACH.
+    with PTRACE_ATTACH, or through children calling PTRACE_TRACEME.
 
-3 - no attach: no processes may use ptrace with PTRACE_ATTACH. Once set,
-    this sysctl cannot be changed to a lower value.
+3 - no attach: no processes may use ptrace with PTRACE_ATTACH nor via
+    PTRACE_TRACEME. Once set, this sysctl value cannot be changed.
 
 The original children-only logic was based on the restrictions in grsecurity.
 

Documentation/sysctl/vm.txt

@@ -76,8 +76,8 @@ huge pages although processes will also directly compact memory as required.
 
 dirty_background_bytes
 
-Contains the amount of dirty memory at which the pdflush background writeback
-daemon will start writeback.
+Contains the amount of dirty memory at which the background kernel
+flusher threads will start writeback.
 
 Note: dirty_background_bytes is the counterpart of dirty_background_ratio. Only
 one of them may be specified at a time. When one sysctl is written it is
@@ -89,7 +89,7 @@ other appears as 0 when read.
 dirty_background_ratio
 
 Contains, as a percentage of total system memory, the number of pages at which
-the pdflush background writeback daemon will start writing out dirty data.
+the background kernel flusher threads will start writing out dirty data.
 
 ==============================================================
 
@@ -112,9 +112,9 @@ retained.
 dirty_expire_centisecs
 
 This tunable is used to define when dirty data is old enough to be eligible
-for writeout by the pdflush daemons.  It is expressed in 100'ths of a second.
-Data which has been dirty in-memory for longer than this interval will be
-written out next time a pdflush daemon wakes up.
+for writeout by the kernel flusher threads.  It is expressed in 100'ths
+of a second.  Data which has been dirty in-memory for longer than this
+interval will be written out next time a flusher thread wakes up.
 
 ==============================================================
 
@@ -128,7 +128,7 @@ data.
 
 dirty_writeback_centisecs
 
-The pdflush writeback daemons will periodically wake up and write `old' data
+The kernel flusher threads will periodically wake up and write `old' data
 out to disk.  This tunable expresses the interval between those wakeups, in
 100'ths of a second.
 

Documentation/vm/hugetlbpage.txt

@@ -299,11 +299,17 @@ map_hugetlb.c.
 *******************************************************************
 
 /*
- * hugepage-shm:  see Documentation/vm/hugepage-shm.c
+ * map_hugetlb: see tools/testing/selftests/vm/map_hugetlb.c
  */
 
 *******************************************************************
 
 /*
- * hugepage-mmap:  see Documentation/vm/hugepage-mmap.c
+ * hugepage-shm:  see tools/testing/selftests/vm/hugepage-shm.c
+ */
+
+*******************************************************************
+
+/*
+ * hugepage-mmap:  see tools/testing/selftests/vm/hugepage-mmap.c
  */

Documentation/w1/slaves/w1_therm

@@ -3,6 +3,7 @@ Kernel driver w1_therm
 
 Supported chips:
   * Maxim ds18*20 based temperature sensors.
+  * Maxim ds1825 based temperature sensors.
 
 Author: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
 
@@ -15,6 +16,7 @@ supported family codes:
 W1_THERM_DS18S20	0x10
 W1_THERM_DS1822		0x22
 W1_THERM_DS18B20	0x28
+W1_THERM_DS1825		0x3B
 
 Support is provided through the sysfs w1_slave file.  Each open and
 read sequence will initiate a temperature conversion then provide two