---

yaml
---
r: 195995
b: refs/heads/master
c: 7c9a84a
h: refs/heads/master
i:
  195993: 247cfa2
  195991: 3369ce7
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: e90e4d9234c953b29267cc4fc9ad804128773313
+refs/heads/master: 7c9a84a57b57978f0ea0d2dc16394d75a781e6a5

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

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/DMA-API-HOWTO.txt

@@ -742,7 +742,7 @@ failure can be determined by:
 
 			   Closing
 
-This document, and the API itself, would not be in its current
+This document, and the API itself, would not be in it's current
 form without the feedback and suggestions from numerous individuals.
 We would like to specifically mention, in no particular order, the
 following people:

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.