Merge remote branch 'origin/master' into merge

Manual merge of arch/powerpc/kernel/smp.c and add missing scheduler_ipi()
call to arch/powerpc/platforms/cell/interrupt.c

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

40 files changed, 716 insertions, 398 deletions

diff --git a/Documentation/00-INDEX b/Documentation/00-INDEX
index c17cd4bb229..1b777b96049 100644
--- a/Documentation/00-INDEX
+++ b/Documentation/00-INDEX
@@ -328,8 +328,6 @@ sysrq.txt
 	- info on the magic SysRq key.
 telephony/
 	- directory with info on telephony (e.g. voice over IP) support.
-uml/
-	- directory with information about User Mode Linux.
 unicode.txt
 	- info on the Unicode character/font mapping used in Linux.
 unshare.txt
diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu
index 7564e88bfa4..e7be75b96e4 100644
--- a/Documentation/ABI/testing/sysfs-devices-system-cpu
+++ b/Documentation/ABI/testing/sysfs-devices-system-cpu
@@ -183,21 +183,21 @@ Description:	Discover and change clock speed of CPUs
 		to learn how to control the knobs.
 
 
-What:      /sys/devices/system/cpu/cpu*/cache/index*/cache_disable_X
-Date:      August 2008
+What:		/sys/devices/system/cpu/cpu*/cache/index3/cache_disable_{0,1}
+Date:		August 2008
 KernelVersion:	2.6.27
-Contact:	mark.langsdorf@amd.com
-Description:	These files exist in every cpu's cache index directories.
-		There are currently 2 cache_disable_# files in each
-		directory.  Reading from these files on a supported
-		processor will return that cache disable index value
-		for that processor and node.  Writing to one of these
-		files will cause the specificed cache index to be disabled.
-
-		Currently, only AMD Family 10h Processors support cache index
-		disable, and only for their L3 caches.  See the BIOS and
-		Kernel Developer's Guide at
-		http://support.amd.com/us/Embedded_TechDocs/31116-Public-GH-BKDG_3-28_5-28-09.pdf	
-		for formatting information and other details on the
-		cache index disable.
-Users:    joachim.deguara@amd.com
+Contact:	discuss@x86-64.org
+Description:	Disable L3 cache indices
+
+		These files exist in every CPU's cache/index3 directory. Each
+		cache_disable_{0,1} file corresponds to one disable slot which
+		can be used to disable a cache index. Reading from these files
+		on a processor with this functionality will return the currently
+		disabled index for that node. There is one L3 structure per
+		node, or per internal node on MCM machines. Writing a valid
+		index to one of these files will cause the specificed cache
+		index to be disabled.
+
+		All AMD processors with L3 caches provide this functionality.
+		For details, see BKDGs at
+		http://developer.amd.com/documentation/guides/Pages/default.aspx
diff --git a/Documentation/ABI/testing/sysfs-firmware-dmi b/Documentation/ABI/testing/sysfs-firmware-dmi
index ba9da9503c2..c78f9ab01e5 100644
--- a/Documentation/ABI/testing/sysfs-firmware-dmi
+++ b/Documentation/ABI/testing/sysfs-firmware-dmi
@@ -14,14 +14,15 @@ Description:
 
 		DMI is structured as a large table of entries, where
 		each entry has a common header indicating the type and
-		length of the entry, as well as 'handle' that is
-		supposed to be unique amongst all entries.
+		length of the entry, as well as a firmware-provided
+		'handle' that is supposed to be unique amongst all
+		entries.
 
 		Some entries are required by the specification, but many
 		others are optional.  In general though, users should
 		never expect to find a specific entry type on their
 		system unless they know for certain what their firmware
-		is doing.  Machine to machine will vary.
+		is doing.  Machine to machine experiences will vary.
 
 		Multiple entries of the same type are allowed.  In order
 		to handle these duplicate entry types, each entry is
@@ -67,25 +68,24 @@ Description:
 			  and the two terminating nul characters.
 		type	: The type of the entry.  This value is the same
 			  as found in the directory name.  It indicates
-			  how the rest of the entry should be
-			  interpreted.
+			  how the rest of the entry should be interpreted.
 		instance: The instance ordinal of the entry for the
 			  given type.  This value is the same as found
 			  in the parent directory name.
-		position: The position of the entry within the entirety
-			  of the entirety.
+		position: The ordinal position (zero-based) of the entry
+			  within the entirety of the DMI entry table.
 
 		=== Entry Specialization ===
 
 		Some entry types may have other information available in
-		sysfs.
+		sysfs.  Not all types are specialized.
 
 		--- Type 15 - System Event Log ---
 
 		This entry allows the firmware to export a log of
 		events the system has taken.  This information is
 		typically backed by nvram, but the implementation
-		details are abstracted by this table.  This entries data
+		details are abstracted by this table.  This entry's data
 		is exported in the directory:
 
 		/sys/firmware/dmi/entries/15-0/system_event_log
diff --git a/Documentation/ABI/testing/sysfs-firmware-gsmi b/Documentation/ABI/testing/sysfs-firmware-gsmi
new file mode 100644
index 00000000000..0faa0aaf4b6
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-firmware-gsmi
@@ -0,0 +1,58 @@
+What:		/sys/firmware/gsmi
+Date:		March 2011
+Contact:	Mike Waychison <mikew@google.com>
+Description:
+		Some servers used internally at Google have firmware
+		that provides callback functionality via explicit SMI
+		triggers.  Some of the callbacks are similar to those
+		provided by the EFI runtime services page, but due to
+		historical reasons this different entry-point has been
+		used.
+
+		The gsmi driver implements the kernel's abstraction for
+		these firmware callbacks.  Currently, this functionality
+		is limited to handling the system event log and getting
+		access to EFI-style variables stored in nvram.
+
+		Layout:
+
+		/sys/firmware/gsmi/vars:
+
+			This directory has the same layout (and
+			underlying implementation as /sys/firmware/efi/vars.
+			See Documentation/ABI/*/sysfs-firmware-efi-vars
+			for more information on how to interact with
+			this structure.
+
+		/sys/firmware/gsmi/append_to_eventlog - write-only:
+
+			This file takes a binary blob and passes it onto
+			the firmware to be timestamped and appended to
+			the system eventlog.  The binary format is
+			interpreted by the firmware and may change from
+			platform to platform.  The only kernel-enforced
+			requirement is that the blob be prefixed with a
+			32bit host-endian type used as part of the
+			firmware call.
+
+		/sys/firmware/gsmi/clear_config - write-only:
+
+			Writing any value to this file will cause the
+			entire firmware configuration to be reset to
+			"factory defaults".  Callers should assume that
+			a reboot is required for the configuration to be
+			cleared.
+
+		/sys/firmware/gsmi/clear_eventlog - write-only:
+
+			This file is used to clear out a portion/the
+			whole of the system event log.  Values written
+			should be values between 1 and 100 inclusive (in
+			ASCII) representing the fraction of the log to
+			clear.  Not all platforms support fractional
+			clearing though, and this writes to this file
+			will error out if the firmware doesn't like your
+			submitted fraction.
+
+			Callers should assume that a reboot is needed
+			for this operation to complete.
diff --git a/Documentation/ABI/testing/sysfs-firmware-log b/Documentation/ABI/testing/sysfs-firmware-log
new file mode 100644
index 00000000000..9b58e7c5365
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-firmware-log
@@ -0,0 +1,7 @@
+What:		/sys/firmware/log
+Date:		February 2011
+Contact:	Mike Waychison <mikew@google.com>
+Description:
+		The /sys/firmware/log is a binary file that represents a
+		read-only copy of the firmware's log if one is
+		available.
diff --git a/Documentation/ABI/testing/sysfs-kernel-fscaps b/Documentation/ABI/testing/sysfs-kernel-fscaps
new file mode 100644
index 00000000000..50a3033b5e1
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-kernel-fscaps
@@ -0,0 +1,8 @@
+What:		/sys/kernel/fscaps
+Date:		February 2011
+KernelVersion:	2.6.38
+Contact:	Ludwig Nussel <ludwig.nussel@suse.de>
+Description
+		Shows whether file system capabilities are honored
+		when executing a binary
+
diff --git a/Documentation/ABI/testing/sysfs-power b/Documentation/ABI/testing/sysfs-power
index 194ca446ac2..b464d12761b 100644
--- a/Documentation/ABI/testing/sysfs-power
+++ b/Documentation/ABI/testing/sysfs-power
@@ -158,3 +158,17 @@ Description:
 		successful, will make the kernel abort a subsequent transition
 		to a sleep state if any wakeup events are reported after the
 		write has returned.
+
+What:		/sys/power/reserved_size
+Date:		May 2011
+Contact:	Rafael J. Wysocki <rjw@sisk.pl>
+Description:
+		The /sys/power/reserved_size file allows user space to control
+		the amount of memory reserved for allocations made by device
+		drivers during the "device freeze" stage of hibernation.  It can
+		be written a string representing a non-negative integer that
+		will be used as the amount of memory to reserve for allocations
+		made by device drivers' "freeze" callbacks, in bytes.
+
+		Reading from this file will display the current value, which is
+		set to 1 MB by default.
diff --git a/Documentation/DocBook/device-drivers.tmpl b/Documentation/DocBook/device-drivers.tmpl
index 36f63d4a0a0..b638e50cf8f 100644
--- a/Documentation/DocBook/device-drivers.tmpl
+++ b/Documentation/DocBook/device-drivers.tmpl
@@ -96,10 +96,10 @@ X!Iinclude/linux/kobject.h
 
   <chapter id="devdrivers">
      <title>Device drivers infrastructure</title>
+     <sect1><title>The Basic Device Driver-Model Structures </title>
+!Iinclude/linux/device.h
+     </sect1>
      <sect1><title>Device Drivers Base</title>
-<!--
-X!Iinclude/linux/device.h
--->
 !Edrivers/base/driver.c
 !Edrivers/base/core.c
 !Edrivers/base/class.c
diff --git a/Documentation/DocBook/genericirq.tmpl b/Documentation/DocBook/genericirq.tmpl
index fb10fd08c05..b3422341d65 100644
--- a/Documentation/DocBook/genericirq.tmpl
+++ b/Documentation/DocBook/genericirq.tmpl
@@ -191,8 +191,8 @@
 	<para>
 	Whenever an interrupt triggers, the lowlevel arch code calls into
 	the generic interrupt code by calling desc->handle_irq().
-	This highlevel IRQ handling function only uses desc->chip primitives
-	referenced by the assigned chip descriptor structure.
+	This highlevel IRQ handling function only uses desc->irq_data.chip
+	primitives referenced by the assigned chip descriptor structure.
 	</para>
     </sect1>
     <sect1 id="Highlevel_Driver_API">
@@ -206,11 +206,11 @@
 	  <listitem><para>enable_irq()</para></listitem>
 	  <listitem><para>disable_irq_nosync() (SMP only)</para></listitem>
 	  <listitem><para>synchronize_irq() (SMP only)</para></listitem>
-	  <listitem><para>set_irq_type()</para></listitem>
-	  <listitem><para>set_irq_wake()</para></listitem>
-	  <listitem><para>set_irq_data()</para></listitem>
-	  <listitem><para>set_irq_chip()</para></listitem>
-	  <listitem><para>set_irq_chip_data()</para></listitem>
+	  <listitem><para>irq_set_irq_type()</para></listitem>
+	  <listitem><para>irq_set_irq_wake()</para></listitem>
+	  <listitem><para>irq_set_handler_data()</para></listitem>
+	  <listitem><para>irq_set_chip()</para></listitem>
+	  <listitem><para>irq_set_chip_data()</para></listitem>
           </itemizedlist>
 	  See the autogenerated function documentation for details.
 	</para>
@@ -225,6 +225,8 @@
 	  <listitem><para>handle_fasteoi_irq</para></listitem>
 	  <listitem><para>handle_simple_irq</para></listitem>
 	  <listitem><para>handle_percpu_irq</para></listitem>
+	  <listitem><para>handle_edge_eoi_irq</para></listitem>
+	  <listitem><para>handle_bad_irq</para></listitem>
 	  </itemizedlist>
 	  The interrupt flow handlers (either predefined or architecture
 	  specific) are assigned to specific interrupts by the architecture
@@ -241,13 +243,13 @@
 		<programlisting>
 default_enable(struct irq_data *data)
 {
-	desc->chip->irq_unmask(data);
+	desc->irq_data.chip->irq_unmask(data);
 }
 
 default_disable(struct irq_data *data)
 {
 	if (!delay_disable(data))
-		desc->chip->irq_mask(data);
+		desc->irq_data.chip->irq_mask(data);
 }
 
 default_ack(struct irq_data *data)
@@ -284,9 +286,9 @@ noop(struct irq_data *data))
 		<para>
 		The following control flow is implemented (simplified excerpt):
 		<programlisting>
-desc->chip->irq_mask();
-handle_IRQ_event(desc->action);
-desc->chip->irq_unmask();
+desc->irq_data.chip->irq_mask_ack();
+handle_irq_event(desc->action);
+desc->irq_data.chip->irq_unmask();
 		</programlisting>
 		</para>
 	    </sect3>
@@ -300,8 +302,8 @@ desc->chip->irq_unmask();
 		<para>
 		The following control flow is implemented (simplified excerpt):
 		<programlisting>
-handle_IRQ_event(desc->action);
-desc->chip->irq_eoi();
+handle_irq_event(desc->action);
+desc->irq_data.chip->irq_eoi();
 		</programlisting>
 		</para>
 	    </sect3>
@@ -315,17 +317,17 @@ desc->chip->irq_eoi();
 		The following control flow is implemented (simplified excerpt):
 		<programlisting>
 if (desc->status &amp; running) {
-	desc->chip->irq_mask();
+	desc->irq_data.chip->irq_mask_ack();
 	desc->status |= pending | masked;
 	return;
 }
-desc->chip->irq_ack();
+desc->irq_data.chip->irq_ack();
 desc->status |= running;
 do {
 	if (desc->status &amp; masked)
-		desc->chip->irq_unmask();
+		desc->irq_data.chip->irq_unmask();
 	desc->status &amp;= ~pending;
-	handle_IRQ_event(desc->action);
+	handle_irq_event(desc->action);
 } while (status &amp; pending);
 desc->status &amp;= ~running;
 		</programlisting>
@@ -344,7 +346,7 @@ desc->status &amp;= ~running;
 		<para>
 		The following control flow is implemented (simplified excerpt):
 		<programlisting>
-handle_IRQ_event(desc->action);
+handle_irq_event(desc->action);
 		</programlisting>
 		</para>
    	    </sect3>
@@ -362,12 +364,29 @@ handle_IRQ_event(desc->action);
 		<para>
 		The following control flow is implemented (simplified excerpt):
 		<programlisting>
-handle_IRQ_event(desc->action);
-if (desc->chip->irq_eoi)
-        desc->chip->irq_eoi();
+if (desc->irq_data.chip->irq_ack)
+	desc->irq_data.chip->irq_ack();
+handle_irq_event(desc->action);
+if (desc->irq_data.chip->irq_eoi)
+        desc->irq_data.chip->irq_eoi();
 		</programlisting>
 		</para>
    	    </sect3>
+	    <sect3 id="EOI_Edge_IRQ_flow_handler">
+	 	<title>EOI Edge IRQ flow handler</title>
+		<para>
+		handle_edge_eoi_irq provides an abnomination of the edge
+		handler which is solely used to tame a badly wreckaged
+		irq controller on powerpc/cell.
+		</para>
+   	    </sect3>
+	    <sect3 id="BAD_IRQ_flow_handler">
+	 	<title>Bad IRQ flow handler</title>
+		<para>
+		handle_bad_irq is used for spurious interrupts which
+		have no real handler assigned..
+		</para>
+   	    </sect3>
 	</sect2>
 	<sect2 id="Quirks_and_optimizations">
 	<title>Quirks and optimizations</title>
@@ -410,6 +429,7 @@ if (desc->chip->irq_eoi)
 	  <listitem><para>irq_mask_ack() - Optional, recommended for performance</para></listitem>
 	  <listitem><para>irq_mask()</para></listitem>
 	  <listitem><para>irq_unmask()</para></listitem>
+	  <listitem><para>irq_eoi() - Optional, required for eoi flow handlers</para></listitem>
 	  <listitem><para>irq_retrigger() - Optional</para></listitem>
 	  <listitem><para>irq_set_type() - Optional</para></listitem>
 	  <listitem><para>irq_set_wake() - Optional</para></listitem>
@@ -424,32 +444,24 @@ if (desc->chip->irq_eoi)
   <chapter id="doirq">
      <title>__do_IRQ entry point</title>
      <para>
- 	The original implementation __do_IRQ() is an alternative entry
-	point for all types of interrupts.
+	The original implementation __do_IRQ() was an alternative entry
+	point for all types of interrupts. It not longer exists.
      </para>
      <para>
 	This handler turned out to be not suitable for all
 	interrupt hardware and was therefore reimplemented with split
-	functionality for egde/level/simple/percpu interrupts. This is not
+	functionality for edge/level/simple/percpu interrupts. This is not
 	only a functional optimization. It also shortens code paths for
 	interrupts.
       </para>
-      <para>
-	To make use of the split implementation, replace the call to
-	__do_IRQ by a call to desc->handle_irq() and associate
-        the appropriate handler function to desc->handle_irq().
-	In most cases the generic handler implementations should
-	be sufficient.
-     </para>
   </chapter>
 
   <chapter id="locking">
      <title>Locking on SMP</title>
      <para>
 	The locking of chip registers is up to the architecture that
-	defines the chip primitives. There is a chip->lock field that can be used
-	for serialization, but the generic layer does not touch it. The per-irq
-	structure is protected via desc->lock, by the generic layer.
+	defines the chip primitives. The per-irq structure is
+	protected via desc->lock, by the generic layer.
      </para>
   </chapter>
   <chapter id="structs">
diff --git a/Documentation/RCU/00-INDEX b/Documentation/RCU/00-INDEX
index 71b6f500ddb..1d7a885761f 100644
--- a/Documentation/RCU/00-INDEX
+++ b/Documentation/RCU/00-INDEX
@@ -21,7 +21,7 @@ rcu.txt
 RTFP.txt
 	- List of RCU papers (bibliography) going back to 1980.
 stallwarn.txt
-	- RCU CPU stall warnings (CONFIG_RCU_CPU_STALL_DETECTOR)
+	- RCU CPU stall warnings (module parameter rcu_cpu_stall_suppress)
 torture.txt
 	- RCU Torture Test Operation (CONFIG_RCU_TORTURE_TEST)
 trace.txt
diff --git a/Documentation/RCU/stallwarn.txt b/Documentation/RCU/stallwarn.txt
index 862c08ef1fd..4e959208f73 100644
--- a/Documentation/RCU/stallwarn.txt
+++ b/Documentation/RCU/stallwarn.txt
@@ -1,22 +1,25 @@
 Using RCU's CPU Stall Detector
 
-The CONFIG_RCU_CPU_STALL_DETECTOR kernel config parameter enables
-RCU's CPU stall detector, which detects conditions that unduly delay
-RCU grace periods.  The stall detector's idea of what constitutes
-"unduly delayed" is controlled by a set of C preprocessor macros:
+The rcu_cpu_stall_suppress module parameter enables RCU's CPU stall
+detector, which detects conditions that unduly delay RCU grace periods.
+This module parameter enables CPU stall detection by default, but
+may be overridden via boot-time parameter or at runtime via sysfs.
+The stall detector's idea of what constitutes "unduly delayed" is
+controlled by a set of kernel configuration variables and cpp macros:
 
-RCU_SECONDS_TILL_STALL_CHECK
+CONFIG_RCU_CPU_STALL_TIMEOUT
 
-	This macro defines the period of time that RCU will wait from
-	the beginning of a grace period until it issues an RCU CPU
-	stall warning.	This time period is normally ten seconds.
+	This kernel configuration parameter defines the period of time
+	that RCU will wait from the beginning of a grace period until it
+	issues an RCU CPU stall warning.  This time period is normally
+	ten seconds.
 
 RCU_SECONDS_TILL_STALL_RECHECK
 
 	This macro defines the period of time that RCU will wait after
 	issuing a stall warning until it issues another stall warning
-	for the same stall.  This time period is normally set to thirty
-	seconds.
+	for the same stall.  This time period is normally set to three
+	times the check interval plus thirty seconds.
 
 RCU_STALL_RAT_DELAY
 
diff --git a/Documentation/RCU/trace.txt b/Documentation/RCU/trace.txt
index 6a8c73f55b8..c078ad48f7a 100644
--- a/Documentation/RCU/trace.txt
+++ b/Documentation/RCU/trace.txt
@@ -10,34 +10,46 @@ for rcutree and next for rcutiny.
 
 CONFIG_TREE_RCU and CONFIG_TREE_PREEMPT_RCU debugfs Files and Formats
 
-These implementations of RCU provides five debugfs files under the
-top-level directory RCU: rcu/rcudata (which displays fields in struct
-rcu_data), rcu/rcudata.csv (which is a .csv spreadsheet version of
-rcu/rcudata), rcu/rcugp (which displays grace-period counters),
-rcu/rcuhier (which displays the struct rcu_node hierarchy), and
-rcu/rcu_pending (which displays counts of the reasons that the
-rcu_pending() function decided that there was core RCU work to do).
+These implementations of RCU provides several debugfs files under the
+top-level directory "rcu":
+
+rcu/rcudata:
+	Displays fields in struct rcu_data.
+rcu/rcudata.csv:
+	Comma-separated values spreadsheet version of rcudata.
+rcu/rcugp:
+	Displays grace-period counters.
+rcu/rcuhier:
+	Displays the struct rcu_node hierarchy.
+rcu/rcu_pending:
+	Displays counts of the reasons rcu_pending() decided that RCU had
+	work to do.
+rcu/rcutorture:
+	Displays rcutorture test progress.
+rcu/rcuboost:
+	Displays RCU boosting statistics.  Only present if
+	CONFIG_RCU_BOOST=y.
 
 The output of "cat rcu/rcudata" looks as follows:
 
 rcu_sched:
-  0 c=17829 g=17829 pq=1 pqc=17829 qp=0 dt=10951/1 dn=0 df=1101 of=0 ri=36 ql=0 b=10
-  1 c=17829 g=17829 pq=1 pqc=17829 qp=0 dt=16117/1 dn=0 df=1015 of=0 ri=0 ql=0 b=10
-  2 c=17829 g=17829 pq=1 pqc=17829 qp=0 dt=1445/1 dn=0 df=1839 of=0 ri=0 ql=0 b=10
-  3 c=17829 g=17829 pq=1 pqc=17829 qp=0 dt=6681/1 dn=0 df=1545 of=0 ri=0 ql=0 b=10
-  4 c=17829 g=17829 pq=1 pqc=17829 qp=0 dt=1003/1 dn=0 df=1992 of=0 ri=0 ql=0 b=10
-  5 c=17829 g=17830 pq=1 pqc=17829 qp=1 dt=3887/1 dn=0 df=3331 of=0 ri=4 ql=2 b=10
-  6 c=17829 g=17829 pq=1 pqc=17829 qp=0 dt=859/1 dn=0 df=3224 of=0 ri=0 ql=0 b=10
-  7 c=17829 g=17830 pq=0 pqc=17829 qp=1 dt=3761/1 dn=0 df=1818 of=0 ri=0 ql=2 b=10
+  0 c=20972 g=20973 pq=1 pqc=20972 qp=0 dt=545/1/0 df=50 of=0 ri=0 ql=163 qs=NRW. kt=0/W/0 ktl=ebc3 b=10 ci=153737 co=0 ca=0
+  1 c=20972 g=20973 pq=1 pqc=20972 qp=0 dt=967/1/0 df=58 of=0 ri=0 ql=634 qs=NRW. kt=0/W/1 ktl=58c b=10 ci=191037 co=0 ca=0
+  2 c=20972 g=20973 pq=1 pqc=20972 qp=0 dt=1081/1/0 df=175 of=0 ri=0 ql=74 qs=N.W. kt=0/W/2 ktl=da94 b=10 ci=75991 co=0 ca=0
+  3 c=20942 g=20943 pq=1 pqc=20942 qp=1 dt=1846/0/0 df=404 of=0 ri=0 ql=0 qs=.... kt=0/W/3 ktl=d1cd b=10 ci=72261 co=0 ca=0
+  4 c=20972 g=20973 pq=1 pqc=20972 qp=0 dt=369/1/0 df=83 of=0 ri=0 ql=48 qs=N.W. kt=0/W/4 ktl=e0e7 b=10 ci=128365 co=0 ca=0
+  5 c=20972 g=20973 pq=1 pqc=20972 qp=0 dt=381/1/0 df=64 of=0 ri=0 ql=169 qs=NRW. kt=0/W/5 ktl=fb2f b=10 ci=164360 co=0 ca=0
+  6 c=20972 g=20973 pq=1 pqc=20972 qp=0 dt=1037/1/0 df=183 of=0 ri=0 ql=62 qs=N.W. kt=0/W/6 ktl=d2ad b=10 ci=65663 co=0 ca=0
+  7 c=20897 g=20897 pq=1 pqc=20896 qp=0 dt=1572/0/0 df=382 of=0 ri=0 ql=0 qs=.... kt=0/W/7 ktl=cf15 b=10 ci=75006 co=0 ca=0
 rcu_bh:
-  0 c=-275 g=-275 pq=1 pqc=-275 qp=0 dt=10951/1 dn=0 df=0 of=0 ri=0 ql=0 b=10
-  1 c=-275 g=-275 pq=1 pqc=-275 qp=0 dt=16117/1 dn=0 df=13 of=0 ri=0 ql=0 b=10
-  2 c=-275 g=-275 pq=1 pqc=-275 qp=0 dt=1445/1 dn=0 df=15 of=0 ri=0 ql=0 b=10
-  3 c=-275 g=-275 pq=1 pqc=-275 qp=0 dt=6681/1 dn=0 df=9 of=0 ri=0 ql=0 b=10
-  4 c=-275 g=-275 pq=1 pqc=-275 qp=0 dt=1003/1 dn=0 df=15 of=0 ri=0 ql=0 b=10
-  5 c=-275 g=-275 pq=1 pqc=-275 qp=0 dt=3887/1 dn=0 df=15 of=0 ri=0 ql=0 b=10
-  6 c=-275 g=-275 pq=1 pqc=-275 qp=0 dt=859/1 dn=0 df=15 of=0 ri=0 ql=0 b=10
-  7 c=-275 g=-275 pq=1 pqc=-275 qp=0 dt=3761/1 dn=0 df=15 of=0 ri=0 ql=0 b=10
+  0 c=1480 g=1480 pq=1 pqc=1479 qp=0 dt=545/1/0 df=6 of=0 ri=1 ql=0 qs=.... kt=0/W/0 ktl=ebc3 b=10 ci=0 co=0 ca=0
+  1 c=1480 g=1480 pq=1 pqc=1479 qp=0 dt=967/1/0 df=3 of=0 ri=1 ql=0 qs=.... kt=0/W/1 ktl=58c b=10 ci=151 co=0 ca=0
+  2 c=1480 g=1480 pq=1 pqc=1479 qp=0 dt=1081/1/0 df=6 of=0 ri=1 ql=0 qs=.... kt=0/W/2 ktl=da94 b=10 ci=0 co=0 ca=0
+  3 c=1480 g=1480 pq=1 pqc=1479 qp=0 dt=1846/0/0 df=8 of=0 ri=1 ql=0 qs=.... kt=0/W/3 ktl=d1cd b=10 ci=0 co=0 ca=0
+  4 c=1480 g=1480 pq=1 pqc=1479 qp=0 dt=369/1/0 df=6 of=0 ri=1 ql=0 qs=.... kt=0/W/4 ktl=e0e7 b=10 ci=0 co=0 ca=0
+  5 c=1480 g=1480 pq=1 pqc=1479 qp=0 dt=381/1/0 df=4 of=0 ri=1 ql=0 qs=.... kt=0/W/5 ktl=fb2f b=10 ci=0 co=0 ca=0
+  6 c=1480 g=1480 pq=1 pqc=1479 qp=0 dt=1037/1/0 df=6 of=0 ri=1 ql=0 qs=.... kt=0/W/6 ktl=d2ad b=10 ci=0 co=0 ca=0
+  7 c=1474 g=1474 pq=1 pqc=1473 qp=0 dt=1572/0/0 df=8 of=0 ri=1 ql=0 qs=.... kt=0/W/7 ktl=cf15 b=10 ci=0 co=0 ca=0
 
 The first section lists the rcu_data structures for rcu_sched, the second
 for rcu_bh.  Note that CONFIG_TREE_PREEMPT_RCU kernels will have an
@@ -52,17 +64,18 @@ o	The number at the beginning of each line is the CPU number.
 	substantially larger than the number of actual CPUs.
 
 o	"c" is the count of grace periods that this CPU believes have
-	completed.  CPUs in dynticks idle mode may lag quite a ways
-	behind, for example, CPU 4 under "rcu_sched" above, which has
-	slept through the past 25 RCU grace periods.  It is not unusual
-	to see CPUs lagging by thousands of grace periods.
+	completed.  Offlined CPUs and CPUs in dynticks idle mode may
+	lag quite a ways behind, for example, CPU 6 under "rcu_sched"
+	above, which has been offline through not quite 40,000 RCU grace
+	periods.  It is not unusual to see CPUs lagging by thousands of
+	grace periods.
 
 o	"g" is the count of grace periods that this CPU believes have
-	started.  Again, CPUs in dynticks idle mode may lag beh