---

yaml
---
r: 195722
b: refs/heads/master
c: ec20cec
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 33cf23b0a535475aead57707cb9f4fe135a93544
+refs/heads/master: ec20cec7a351584ca6c70ead012e73d61f9a8e04

trunk/Documentation/00-INDEX

@@ -250,8 +250,6 @@ numastat.txt
 	- info on how to read Numa policy hit/miss statistics in sysfs.
 oops-tracing.txt
 	- how to decode those nasty internal kernel error dump messages.
-padata.txt
-	- An introduction to the "padata" parallel execution API
 parisc/
 	- directory with info on using Linux on PA-RISC architecture.
 parport.txt

trunk/Documentation/ABI/testing/sysfs-bus-usb

@@ -14,6 +14,34 @@ Description:
 		The autosuspend delay for newly-created devices is set to
 		the value of the usbcore.autosuspend module parameter.
 
+What:		/sys/bus/usb/devices/.../power/level
+Date:		March 2007
+KernelVersion:	2.6.21
+Contact:	Alan Stern <stern@rowland.harvard.edu>
+Description:
+		Each USB device directory will contain a file named
+		power/level.  This file holds a power-level setting for
+		the device, either "on" or "auto".
+
+		"on" means that the device is not allowed to autosuspend,
+		although normal suspends for system sleep will still
+		be honored.  "auto" means the device will autosuspend
+		and autoresume in the usual manner, according to the
+		capabilities of its driver.
+
+		During normal use, devices should be left in the "auto"
+		level.  The "on" level is meant for administrative uses.
+		If you want to suspend a device immediately but leave it
+		free to wake up in response to I/O requests, you should
+		write "0" to power/autosuspend.
+
+		Device not capable of proper suspend and resume should be
+		left in the "on" level.  Although the USB spec requires
+		devices to support suspend/resume, many of them do not.
+		In fact so many don't that by default, the USB core
+		initializes all non-hub devices in the "on" level.  Some
+		drivers may change this setting when they are bound.
+
 What:		/sys/bus/usb/devices/.../power/persist
 Date:		May 2007
 KernelVersion:	2.6.23
@@ -132,7 +160,7 @@ Description:
 		match the driver to the device.  For example:
 		# echo "046d c315" > /sys/bus/usb/drivers/foo/remove_id
 
-What:		/sys/bus/usb/device/.../avoid_reset_quirk
+What:		/sys/bus/usb/device/.../avoid_reset
 Date:		December 2009
 Contact:	Oliver Neukum <oliver@neukum.org>
 Description:

trunk/Documentation/ABI/testing/sysfs-devices-memory

@@ -43,7 +43,7 @@ Date:		September 2008
 Contact:	Badari Pulavarty <pbadari@us.ibm.com>
 Description:
 		The file /sys/devices/system/memory/memoryX/state
-		is read-write.  When read, its contents show the
+		is read-write.  When read, it's contents show the
 		online/offline state of the memory section.  When written,
 		root can toggle the the online/offline state of a removable
 		memory section (see removable file description above)

trunk/Documentation/Changes

@@ -49,7 +49,7 @@ o  oprofile               0.9                     # oprofiled --version
 o  udev                   081                     # udevinfo -V
 o  grub                   0.93                    # grub --version
 o  mcelog		  0.6
-o  iptables               1.4.2                   # iptables -V
+o  iptables               1.4.1                   # iptables -V
 
 
 Kernel compilation

trunk/Documentation/DocBook/libata.tmpl

@@ -81,14 +81,16 @@ void (*port_disable) (struct ata_port *);
 	</programlisting>
 
 	<para>
-	Called from ata_bus_probe() error path, as well as when
-	unregistering from the SCSI module (rmmod, hot unplug).
+	Called from ata_bus_probe() and ata_bus_reset() error paths,
+	as well as when unregistering from the SCSI module (rmmod, hot
+	unplug).
 	This function should do whatever needs to be done to take the
 	port out of use.  In most cases, ata_port_disable() can be used
 	as this hook.
 	</para>
 	<para>
 	Called from ata_bus_probe() on a failed probe.
+	Called from ata_bus_reset() on a failed bus reset.
 	Called from ata_scsi_release().
 	</para>
 
@@ -105,6 +107,10 @@ void (*dev_config) (struct ata_port *, struct ata_device *);
 	issue of SET FEATURES - XFER MODE, and prior to operation.
 	</para>
 	<para>
+	Called by ata_device_add() after ata_dev_identify() determines
+	a device is present.
+	</para>
+	<para>
 	This entry may be specified as NULL in ata_port_operations.
 	</para>
 
@@ -148,8 +154,8 @@ unsigned int (*mode_filter) (struct ata_port *, struct ata_device *, unsigned in
 
 	<sect2><title>Taskfile read/write</title>
 	<programlisting>
-void (*sff_tf_load) (struct ata_port *ap, struct ata_taskfile *tf);
-void (*sff_tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
+void (*tf_load) (struct ata_port *ap, struct ata_taskfile *tf);
+void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
 	</programlisting>
 
 	<para>
@@ -158,35 +164,36 @@ void (*sff_tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
 	hardware registers / DMA buffers, to obtain the current set of
 	taskfile register values.
 	Most drivers for taskfile-based hardware (PIO or MMIO) use
-	ata_sff_tf_load() and ata_sff_tf_read() for these hooks.
+	ata_tf_load() and ata_tf_read() for these hooks.
 	</para>
 
 	</sect2>
 
 	<sect2><title>PIO data read/write</title>
 	<programlisting>
-void (*sff_data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
+void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
 	</programlisting>
 
 	<para>
 All bmdma-style drivers must implement this hook.  This is the low-level
 operation that actually copies the data bytes during a PIO data
 transfer.
-Typically the driver will choose one of ata_sff_data_xfer_noirq(),
-ata_sff_data_xfer(), or ata_sff_data_xfer32().
+Typically the driver
+will choose one of ata_pio_data_xfer_noirq(), ata_pio_data_xfer(), or
+ata_mmio_data_xfer().
 	</para>
 
 	</sect2>
 
 	<sect2><title>ATA command execute</title>
 	<programlisting>
-void (*sff_exec_command)(struct ata_port *ap, struct ata_taskfile *tf);
+void (*exec_command)(struct ata_port *ap, struct ata_taskfile *tf);
 	</programlisting>
 
 	<para>
 	causes an ATA command, previously loaded with
 	->tf_load(), to be initiated in hardware.
-	Most drivers for taskfile-based hardware use ata_sff_exec_command()
+	Most drivers for taskfile-based hardware use ata_exec_command()
 	for this hook.
 	</para>
 
@@ -211,35 +218,29 @@ command.
 
 	<sect2><title>Read specific ATA shadow registers</title>
 	<programlisting>
-u8   (*sff_check_status)(struct ata_port *ap);
-u8   (*sff_check_altstatus)(struct ata_port *ap);
+u8   (*check_status)(struct ata_port *ap);
+u8   (*check_altstatus)(struct ata_port *ap);
 	</programlisting>
 
 	<para>
 	Reads the Status/AltStatus ATA shadow register from
 	hardware.  On some hardware, reading the Status register has
 	the side effect of clearing the interrupt condition.
 	Most drivers for taskfile-based hardware use
-	ata_sff_check_status() for this hook.
+	ata_check_status() for this hook.
 	</para>
-
-	</sect2>
-
-	<sect2><title>Write specific ATA shadow register</title>
-	<programlisting>
-void (*sff_set_devctl)(struct ata_port *ap, u8 ctl);
-	</programlisting>
-
 	<para>
-	Write the device control ATA shadow register to the hardware.
-	Most drivers don't need to define this.
+	Note that because this is called from ata_device_add(), at
+	least a dummy function that clears device interrupts must be
+	provided for all drivers, even if the controller doesn't
+	actually have a taskfile status register.
 	</para>
 
 	</sect2>
 
 	<sect2><title>Select ATA device on bus</title>
 	<programlisting>
-void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
+void (*dev_select)(struct ata_port *ap, unsigned int device);
 	</programlisting>
 
 	<para>
@@ -250,7 +251,9 @@ void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
 	</para>
 	<para>
 	Most drivers for taskfile-based hardware use
-	ata_sff_dev_select() for this hook.
+	ata_std_dev_select() for this hook.  Controllers which do not
+	support second drives on a port (such as SATA contollers) will
+	use ata_noop_dev_select().
 	</para>
 
 	</sect2>
@@ -438,13 +441,13 @@ void (*irq_clear) (struct ata_port *);
 	to struct ata_host_set.
 	</para>
 	<para>
-	Most legacy IDE drivers use ata_sff_interrupt() for the
+	Most legacy IDE drivers use ata_interrupt() for the
 	irq_handler hook, which scans all ports in the host_set,
 	determines which queued command was active (if any), and calls
-	ata_sff_host_intr(ap,qc).
+	ata_host_intr(ap,qc).
 	</para>
 	<para>
-	Most legacy IDE drivers use ata_sff_irq_clear() for the
+	Most legacy IDE drivers use ata_bmdma_irq_clear() for the
 	irq_clear() hook, which simply clears the interrupt and error
 	flags in the DMA status register.
 	</para>
@@ -487,12 +490,16 @@ void (*host_stop) (struct ata_host_set *host_set);
 	allocates space for a legacy IDE PRD table and returns.
 	</para>
 	<para>
-	->port_stop() is called after ->host_stop().  Its sole function
+	->port_stop() is called after ->host_stop().  It's sole function
 	is to release DMA/memory resources, now that they are no longer
 	actively being used.  Many drivers also free driver-private
 	data from port at this time.
 	</para>
 	<para>
+	Many drivers use ata_port_stop() as this hook, which frees the
+	PRD table.
+	</para>
+	<para>
 	->host_stop() is called after all ->port_stop() calls
 have completed.  The hook must finalize hardware shutdown, release DMA
 and other resources, etc.