linux: update to 4.1.26, refresh realtime patch

12 files changed, 2214 insertions, 2228 deletions

diff --git a/target/linux/patches/4.1.24/aufs.patch b/target/linux/patches/4.1.26/aufs.patch
index 749c90989..749c90989 100644
--- a/target/linux/patches/4.1.24/aufs.patch
+++ b/target/linux/patches/4.1.26/aufs.patch
diff --git a/target/linux/patches/4.1.24/cleankernel.patch b/target/linux/patches/4.1.26/cleankernel.patch
index 59693f426..59693f426 100644
--- a/target/linux/patches/4.1.24/cleankernel.patch
+++ b/target/linux/patches/4.1.26/cleankernel.patch
diff --git a/target/linux/patches/4.1.24/cris-header.patch b/target/linux/patches/4.1.26/cris-header.patch
index 2b5a88461..2b5a88461 100644
--- a/target/linux/patches/4.1.24/cris-header.patch
+++ b/target/linux/patches/4.1.26/cris-header.patch
diff --git a/target/linux/patches/4.1.24/initramfs-nosizelimit.patch b/target/linux/patches/4.1.26/initramfs-nosizelimit.patch
index 40d2f6bd8..40d2f6bd8 100644
--- a/target/linux/patches/4.1.24/initramfs-nosizelimit.patch
+++ b/target/linux/patches/4.1.26/initramfs-nosizelimit.patch
diff --git a/target/linux/patches/4.1.24/j2-core.patch b/target/linux/patches/4.1.26/j2-core.patch
index 38136df2c..38136df2c 100644
--- a/target/linux/patches/4.1.24/j2-core.patch
+++ b/target/linux/patches/4.1.26/j2-core.patch
diff --git a/target/linux/patches/4.1.24/mtd-rootfs.patch b/target/linux/patches/4.1.26/mtd-rootfs.patch
index 5f6d82b5c..5f6d82b5c 100644
--- a/target/linux/patches/4.1.24/mtd-rootfs.patch
+++ b/target/linux/patches/4.1.26/mtd-rootfs.patch
diff --git a/target/linux/patches/4.1.24/realtime.patch b/target/linux/patches/4.1.26/realtime.patch
index 832b82fdf..6ecf019b9 100644
--- a/target/linux/patches/4.1.24/realtime.patch
+++ b/target/linux/patches/4.1.26/realtime.patch
@@ -1,306 +1,6 @@
-diff -Nur linux-4.1.20.orig/Documentation/hwlat_detector.txt linux-4.1.20/Documentation/hwlat_detector.txt
---- linux-4.1.20.orig/Documentation/hwlat_detector.txt	1970-01-01 01:00:00.000000000 +0100
-+++ linux-4.1.20/Documentation/hwlat_detector.txt	2016-03-21 20:18:28.000000000 +0100
-@@ -0,0 +1,64 @@
-+Introduction:
-+-------------
-+
-+The module hwlat_detector is a special purpose kernel module that is used to
-+detect large system latencies induced by the behavior of certain underlying
-+hardware or firmware, independent of Linux itself. The code was developed
-+originally to detect SMIs (System Management Interrupts) on x86 systems,
-+however there is nothing x86 specific about this patchset. It was
-+originally written for use by the "RT" patch since the Real Time
-+kernel is highly latency sensitive.
-+
-+SMIs are usually not serviced by the Linux kernel, which typically does not
-+even know that they are occuring. SMIs are instead are set up by BIOS code
-+and are serviced by BIOS code, usually for "critical" events such as
-+management of thermal sensors and fans. Sometimes though, SMIs are used for
-+other tasks and those tasks can spend an inordinate amount of time in the
-+handler (sometimes measured in milliseconds). Obviously this is a problem if
-+you are trying to keep event service latencies down in the microsecond range.
-+
-+The hardware latency detector works by hogging all of the cpus for configurable
-+amounts of time (by calling stop_machine()), polling the CPU Time Stamp Counter
-+for some period, then looking for gaps in the TSC data. Any gap indicates a
-+time when the polling was interrupted and since the machine is stopped and
-+interrupts turned off the only thing that could do that would be an SMI.
-+
-+Note that the SMI detector should *NEVER* be used in a production environment.
-+It is intended to be run manually to determine if the hardware platform has a
-+problem with long system firmware service routines.
-+
-+Usage:
-+------
-+
-+Loading the module hwlat_detector passing the parameter "enabled=1" (or by
-+setting the "enable" entry in "hwlat_detector" debugfs toggled on) is the only
-+step required to start the hwlat_detector. It is possible to redefine the
-+threshold in microseconds (us) above which latency spikes will be taken
-+into account (parameter "threshold=").
-+
-+Example:
-+
-+	# modprobe hwlat_detector enabled=1 threshold=100
-+
-+After the module is loaded, it creates a directory named "hwlat_detector" under
-+the debugfs mountpoint, "/debug/hwlat_detector" for this text. It is necessary
-+to have debugfs mounted, which might be on /sys/debug on your system.
-+
-+The /debug/hwlat_detector interface contains the following files:
-+
-+count			- number of latency spikes observed since last reset
-+enable			- a global enable/disable toggle (0/1), resets count
-+max			- maximum hardware latency actually observed (usecs)
-+sample			- a pipe from which to read current raw sample data
-+			  in the format <timestamp> <latency observed usecs>
-+			  (can be opened O_NONBLOCK for a single sample)
-+threshold		- minimum latency value to be considered (usecs)
-+width			- time period to sample with CPUs held (usecs)
-+			  must be less than the total window size (enforced)
-+window			- total period of sampling, width being inside (usecs)
-+
-+By default we will set width to 500,000 and window to 1,000,000, meaning that
-+we will sample every 1,000,000 usecs (1s) for 500,000 usecs (0.5s). If we
-+observe any latencies that exceed the threshold (initially 100 usecs),
-+then we write to a global sample ring buffer of 8K samples, which is
-+consumed by reading from the "sample" (pipe) debugfs file interface.
-diff -Nur linux-4.1.20.orig/Documentation/sysrq.txt linux-4.1.20/Documentation/sysrq.txt
---- linux-4.1.20.orig/Documentation/sysrq.txt	2016-03-17 19:11:03.000000000 +0100
-+++ linux-4.1.20/Documentation/sysrq.txt	2016-03-21 20:18:28.000000000 +0100
-@@ -59,10 +59,17 @@
- On other - If you know of the key combos for other architectures, please
-            let me know so I can add them to this section.
- 
--On all -  write a character to /proc/sysrq-trigger.  e.g.:
--
-+On all -  write a character to /proc/sysrq-trigger, e.g.:
- 		echo t > /proc/sysrq-trigger
- 
-+On all - Enable network SysRq by writing a cookie to icmp_echo_sysrq, e.g.
-+		echo 0x01020304 >/proc/sys/net/ipv4/icmp_echo_sysrq
-+	 Send an ICMP echo request with this pattern plus the particular
-+	 SysRq command key. Example:
-+		# ping -c1 -s57 -p0102030468
-+	 will trigger the SysRq-H (help) command.
-+
-+
- *  What are the 'command' keys?
- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- 'b'     - Will immediately reboot the system without syncing or unmounting
-diff -Nur linux-4.1.20.orig/Documentation/trace/histograms.txt linux-4.1.20/Documentation/trace/histograms.txt
---- linux-4.1.20.orig/Documentation/trace/histograms.txt	1970-01-01 01:00:00.000000000 +0100
-+++ linux-4.1.20/Documentation/trace/histograms.txt	2016-03-21 20:18:28.000000000 +0100
-@@ -0,0 +1,186 @@
-+		Using the Linux Kernel Latency Histograms
-+
-+
-+This document gives a short explanation how to enable, configure and use
-+latency histograms. Latency histograms are primarily relevant in the
-+context of real-time enabled kernels (CONFIG_PREEMPT/CONFIG_PREEMPT_RT)
-+and are used in the quality management of the Linux real-time
-+capabilities.
-+
-+
-+* Purpose of latency histograms
-+
-+A latency histogram continuously accumulates the frequencies of latency
-+data. There are two types of histograms
-+- potential sources of latencies
-+- effective latencies
-+
-+
-+* Potential sources of latencies
-+
-+Potential sources of latencies are code segments where interrupts,
-+preemption or both are disabled (aka critical sections). To create
-+histograms of potential sources of latency, the kernel stores the time
-+stamp at the start of a critical section, determines the time elapsed
-+when the end of the section is reached, and increments the frequency
-+counter of that latency value - irrespective of whether any concurrently
-+running process is affected by latency or not.
-+- Configuration items (in the Kernel hacking/Tracers submenu)
-+  CONFIG_INTERRUPT_OFF_LATENCY
-+  CONFIG_PREEMPT_OFF_LATENCY
-+
-+
-+* Effective latencies
-+
-+Effective latencies are actually occuring during wakeup of a process. To
-+determine effective latencies, the kernel stores the time stamp when a
-+process is scheduled to be woken up, and determines the duration of the
-+wakeup time shortly before control is passed over to this process. Note
-+that the apparent latency in user space may be somewhat longer, since the
-+process may be interrupted after control is passed over to it but before
-+the execution in user space takes place. Simply measuring the interval
-+between enqueuing and wakeup may also not appropriate in cases when a
-+process is scheduled as a result of a timer expiration. The timer may have
-+missed its deadline, e.g. due to disabled interrupts, but this latency
-+would not be registered. Therefore, the offsets of missed timers are
-+recorded in a separate histogram. If both wakeup latency and missed timer
-+offsets are configured and enabled, a third histogram may be enabled that
-+records the overall latency as a sum of the timer latency, if any, and the
-+wakeup latency. This histogram is called "timerandwakeup".
-+- Configuration items (in the Kernel hacking/Tracers submenu)
-+  CONFIG_WAKEUP_LATENCY
-+  CONFIG_MISSED_TIMER_OFSETS
-+
-+
-+* Usage
-+
-+The interface to the administration of the latency histograms is located
-+in the debugfs file system. To mount it, either enter
-+
-+mount -t sysfs nodev /sys
-+mount -t debugfs nodev /sys/kernel/debug
-+
-+from shell command line level, or add
-+
-+nodev	/sys			sysfs	defaults	0 0
-+nodev	/sys/kernel/debug	debugfs	defaults	0 0
-+
-+to the file /etc/fstab. All latency histogram related files are then
-+available in the directory /sys/kernel/debug/tracing/latency_hist. A
-+particular histogram type is enabled by writing non-zero to the related
-+variable in the /sys/kernel/debug/tracing/latency_hist/enable directory.
-+Select "preemptirqsoff" for the histograms of potential sources of
-+latencies and "wakeup" for histograms of effective latencies etc. The
-+histogram data - one per CPU - are available in the files
-+
-+/sys/kernel/debug/tracing/latency_hist/preemptoff/CPUx
-+/sys/kernel/debug/tracing/latency_hist/irqsoff/CPUx
-+/sys/kernel/debug/tracing/latency_hist/preemptirqsoff/CPUx
-+/sys/kernel/debug/tracing/latency_hist/wakeup/CPUx
-+/sys/kernel/debug/tracing/latency_hist/wakeup/sharedprio/CPUx
-+/sys/kernel/debug/tracing/latency_hist/missed_timer_offsets/CPUx
-+/sys/kernel/debug/tracing/latency_hist/timerandwakeup/CPUx
-+
-+The histograms are reset by writing non-zero to the file "reset" in a
-+particular latency directory. To reset all latency data, use
-+
-+#!/bin/sh
-+
-+TRACINGDIR=/sys/kernel/debug/tracing
-+HISTDIR=$TRACINGDIR/latency_hist
-+
-+if test -d $HISTDIR
-+then
-+  cd $HISTDIR
-+  for i in `find . | grep /reset$`
-+  do
-+    echo 1 >$i
-+  done
-+fi
-+
-+
-+* Data format
-+
-+Latency data are stored with a resolution of one microsecond. The
-+maximum latency is 10,240 microseconds. The data are only valid, if the
-+overflow register is empty. Every output line contains the latency in
-+microseconds in the first row and the number of samples in the second
-+row. To display only lines with a positive latency count, use, for
-+example,
-+
-+grep -v " 0$" /sys/kernel/debug/tracing/latency_hist/preemptoff/CPU0
-+
-+#Minimum latency: 0 microseconds.
-+#Average latency: 0 microseconds.
-+#Maximum latency: 25 microseconds.
-+#Total samples: 3104770694
-+#There are 0 samples greater or equal than 10240 microseconds
-+#usecs	         samples
-+    0	      2984486876
-+    1	        49843506
-+    2	        58219047
-+    3	         5348126
-+    4	         2187960
-+    5	         3388262
-+    6	          959289
-+    7	          208294
-+    8	           40420
-+    9	            4485
-+   10	           14918
-+   11	           18340
-+   12	           25052
-+   13	           19455
-+   14	            5602
-+   15	             969
-+   16	              47
-+   17	              18
-+   18	              14
-+   19	               1
-+   20	               3
-+   21	               2
-+   22	               5
-+   23	               2
-+   25	               1
-+
-+
-+* Wakeup latency of a selected process
-+
-+To only collect wakeup latency data of a particular process, write the
-+PID of the requested process to
-+
-+/sys/kernel/debug/tracing/latency_hist/wakeup/pid
-+
-+PIDs are not considered, if this variable is set to 0.
-+
-+
-+* Details of the process with the highest wakeup latency so far
-+
-+Selected data of the process that suffered from the highest wakeup
-+latency that occurred in a particular CPU are available in the file
-+
-+/sys/kernel/debug/tracing/latency_hist/wakeup/max_latency-CPUx.
-+
-+In addition, other relevant system data at the time when the
-+latency occurred are given.
-+
-+The format of the data is (all in one line):
-+<PID> <Priority> <Latency> (<Timeroffset>) <Command> \
-+<- <PID> <Priority> <Command> <Timestamp>
-+
-+The value of <Timeroffset> is only relevant in the combined timer
-+and wakeup latency recording. In the wakeup recording, it is
-+always 0, in the missed_timer_offsets recording, it is the same
-+as <Latency>.
-+
-+When retrospectively searching for the origin of a latency and
-+tracing was not enabled, it may be helpful to know the name and
-+some basic data of the task that (finally) was switching to the
-+late real-tlme task. In addition to the victim's data, also the
-+data of the possible culprit are therefore displayed after the
-+"<-" symbol.
-+
-+Finally, the timestamp of the time when the latency occurred
-+in <seconds>.<microseconds> after the most recent system boot
-+is provided.
-+
-+These data are also reset when the wakeup histogram is reset.
-diff -Nur linux-4.1.20.orig/arch/Kconfig linux-4.1.20/arch/Kconfig
---- linux-4.1.20.orig/arch/Kconfig	2016-03-17 19:11:03.000000000 +0100
-+++ linux-4.1.20/arch/Kconfig	2016-03-21 20:18:28.000000000 +0100
-@@ -6,6 +6,7 @@
- 	tristate "OProfile system profiling"
- 	depends on PROFILING
- 	depends on HAVE_OPROFILE
-+	depends on !PREEMPT_RT_FULL
- 	select RING_BUFFER
- 	select RING_BUFFER_ALLOW_SWAP
- 	help
-@@ -49,6 +50,7 @@
- config JUMP_LABEL
-        bool "Optimize very unlikely/likely branches"
-        depends on HAVE_ARCH_JUMP_LABEL
-+       depends on (!INTERRUPT_OFF_HIST && !PREEMPT_OFF_HIST && !WAKEUP_LATENCY_HIST && !MISSED_TIMER_OFFSETS_HIST)
-        help
-          This option enables a transparent branch optimization that
- 	 makes certain almost-always-true or almost-always-false branch
-diff -Nur linux-4.1.20.orig/arch/alpha/mm/fault.c linux-4.1.20/arch/alpha/mm/fault.c
---- linux-4.1.20.orig/arch/alpha/mm/fault.c	2016-03-17 19:11:03.000000000 +0100
-+++ linux-4.1.20/arch/alpha/mm/fault.c	2016-03-21 20:18:28.000000000 +0100
+diff -Nur linux-4.1.26.orig/arch/alpha/mm/fault.c linux-4.1.26/arch/alpha/mm/fault.c
+--- linux-4.1.26.orig/arch/alpha/mm/fault.c	2016-06-07 01:13:11.000000000 +0200
++++ linux-4.1.26/arch/alpha/mm/fault.c	2016-06-19 15:30:54.915151887 +0200
 @@ -23,8 +23,7 @@
  #include <linux/smp.h>
  #include <linux/interrupt.h>
@@ -320,9 +20,9 @@ diff -Nur linux-4.1.20.orig/arch/alpha/mm/fault.c linux-4.1.20/arch/alpha/mm/fau
  		goto no_context;
  
  #ifdef CONFIG_ALPHA_LARGE_VMALLOC
-diff -Nur linux-4.1.20.orig/arch/arc/include/asm/futex.h linux-4.1.20/arch/arc/include/asm/futex.h
---- linux-4.1.20.orig/arch/arc/include/asm/futex.h	2016-03-17 19:11:03.000000000 +0100
-+++ linux-4.1.20/arch/arc/include/asm/futex.h	2016-03-21 20:18:28.000000000 +0100
+diff -Nur linux-4.1.26.orig/arch/arc/include/asm/futex.h linux-4.1.26/arch/arc/include/asm/futex.h
+--- linux-4.1.26.orig/arch/arc/include/asm/futex.h	2016-06-07 01:13:11.000000000 +0200
++++ linux-4.1.26/arch/arc/include/asm/futex.h	2016-06-19 15:30:54.915151887 +0200
 @@ -53,7 +53,7 @@
  	if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int)))
  		return -EFAULT;
@@ -368,9 +68,9 @@ diff -Nur linux-4.1.20.orig/arch/arc/include/asm/futex.h linux-4.1.20/arch/arc/i
  
  	*uval = val;
  	return val;
-diff -Nur linux-4.1.20.orig/arch/arc/mm/fault.c linux-4.1.20/arch/arc/mm/fault.c
---- linux-4.1.20.orig/arch/arc/mm/fault.c	2016-03-17 19:11:03.000000000 +0100
-+++ linux-4.1.20/arch/arc/mm/fault.c	2016-03-21 20:18:28.000000000 +0100
+diff -Nur linux-4.1.26.orig/arch/arc/mm/fault.c linux-4.1.26/arch/arc/mm/fault.c
+--- linux-4.1.26.orig/arch/arc/mm/fault.c	2016-06-07 01:13:11.000000000 +0200
++++ linux-4.1.26/arch/arc/mm/fault.c	2016-06-19 15:30:54.915151887 +0200
 @@ -86,7 +86,7 @@
  	 * If we're in an interrupt or have no user
  	 * context, we must not take the fault..
@@ -380,29 +80,9 @@ diff -Nur linux-4.1.20.orig/arch/arc/mm/fault.c linux-4.1.20/arch/arc/mm/fault.c
  		goto no_context;
  
  	if (user_mode(regs))
-diff -Nur linux-4.1.20.orig/arch/arm/Kconfig linux-4.1.20/arch/arm/Kconfig
---- linux-4.1.20.orig/arch/arm/Kconfig	2016-03-17 19:11:03.000000000 +0100
-+++ linux-4.1.20/arch/arm/Kconfig	2016-03-21 20:18:28.000000000 +0100
-@@ -31,7 +31,7 @@
- 	select HARDIRQS_SW_RESEND
- 	select HAVE_ARCH_AUDITSYSCALL if (AEABI && !OABI_COMPAT)
- 	select HAVE_ARCH_BITREVERSE if (CPU_32v7M || CPU_32v7) && !CPU_32v6
--	select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
-+	select HAVE_ARCH_JUMP_LABEL if (!XIP_KERNEL && !PREEMPT_RT_BASE)
- 	select HAVE_ARCH_KGDB
- 	select HAVE_ARCH_SECCOMP_FILTER if (AEABI && !OABI_COMPAT)
- 	select HAVE_ARCH_TRACEHOOK
-@@ -66,6 +66,7 @@
- 	select HAVE_PERF_EVENTS
- 	select HAVE_PERF_REGS
- 	select HAVE_PERF_USER_STACK_DUMP
-+	select HAVE_PREEMPT_LAZY
- 	select HAVE_RCU_TABLE_FREE if (SMP && ARM_LPAE)
- 	select HAVE_REGS_AND_STACK_ACCESS_API
- 	select HAVE_SYSCALL_TRACEPOINTS
-diff -Nur linux-4.1.20.orig/arch/arm/include/asm/cmpxchg.h linux-4.1.20/arch/arm/include/asm/cmpxchg.h
---- linux-4.1.20.orig/arch/arm/include/asm/cmpxchg.h	2016-03-17 19:11:03.000000000 +0100
-+++ linux-4.1.20/arch/arm/include/asm/cmpxchg.h	2016-03-21 20:18:28.000000000 +0100
+diff -Nur linux-4.1.26.orig/arch/arm/include/asm/cmpxchg.h linux-4.1.26/arch/arm/include/asm/cmpxchg.h
+--- linux-4.1.26.orig/arch/arm/include/asm/cmpxchg.h	2016-06-07 01:13:11.000000000 +0200
++++ linux-4.1.26/arch/arm/include/asm/cmpxchg.h	2016-06-19 15:30:54.919152041 +0200
 @@ -129,6 +129,8 @@
  
  #else	/* min ARCH >= ARMv6 */
@@ -412,9 +92,9 @@ diff -Nur linux-4.1.20.orig/arch/arm/include/asm/cmpxchg.h linux-4.1.20/arch/arm
  extern void __bad_cmpxchg(volatile void *ptr, int size);
  
  /*
-diff -Nur linux-4.1.20.orig/arch/arm/include/asm/futex.h linux-4.1.20/arch/arm/include/asm/futex.h
---- linux-4.1.20.orig/arch/arm/include/asm/futex.h	2016-03-17 19:11:03.000000000 +0100
-+++ linux-4.1.20/arch/arm/include/asm/futex.h	2016-03-21 20:18:28.000000000 +0100
+diff -Nur linux-4.1.26.orig/arch/arm/include/asm/futex.h linux-4.1.26/arch/arm/include/asm/futex.h
+--- linux-4.1.26.orig/arch/arm/include/asm/futex.h	2016-06-07 01:13:11.000000000 +0200
++++ linux-4.1.26/arch/arm/include/asm/futex.h	2016-06-19 15:30:54.919152041 +0200
 @@ -93,6 +93,7 @@
  	if (!access_ok(VERIFY_WRITE, uaddr, sizeof(u32)))
  		return -EFAULT;
@@ -456,9 +136,9 @@ diff -Nur linux-4.1.20.orig/arch/arm/include/asm/futex.h linux-4.1.20/arch/arm/i
  
  	if (!ret) {
  		switch (cmp) {
-diff -Nur linux-4.1.20.orig/arch/arm/include/asm/switch_to.h linux-4.1.20/arch/arm/include/asm/switch_to.h
---- linux-4.1.20.orig/arch/arm/include/asm/switch_to.h	2016-03-17 19:11:03.000000000 +0100
-+++ linux-4.1.20/arch/arm/include/asm/switch_to.h	2016-03-21 20:18:28.000000000 +0100
+diff -Nur linux-4.1.26.orig/arch/arm/include/asm/switch_to.h linux-4.1.26/arch/arm/include/asm/switch_to.h
+--- linux-4.1.26.orig/arch/arm/include/asm/switch_to.h	2016-06-07 01:13:11.000000000 +0200
++++ linux-4.1.26/arch/arm/include/asm/switch_to.h	2016-06-19 15:30:54.919152041 +0200
 @@ -3,6 +3,13 @@
  
  #include <linux/thread_info.h>
@@ -481,9 +161,9 @@ diff -Nur linux-4.1.20.orig/arch/arm/include/asm/switch_to.h linux-4.1.20/arch/a
  	last = __switch_to(prev,task_thread_info(prev), task_thread_info(next));	\
  } while (0)
  
-diff -Nur linux-4.1.20.orig/arch/arm/include/asm/thread_info.h linux-4.1.20/arch/arm/include/asm/thread_info.h
---- linux-4.1.20.orig/arch/arm/include/asm/thread_info.h	2016-03-17 19:11:03.000000000 +0100
-+++ linux-4.1.20/arch/arm/include/asm/thread_info.h	2016-03-21 20:18:28.000000000 +0100
+diff -Nur linux-4.1.26.orig/arch/arm/include/asm/thread_info.h linux-4.1.26/arch/arm/include/asm/thread_info.h
+--- linux-4.1.26.orig/arch/arm/include/asm/thread_info.h	2016-06-07 01:13:11.000000000 +0200
++++ linux-4.1.26/arch/arm/include/asm/thread_info.h	2016-06-19 15:30:54.919152041 +0200
 @@ -50,6 +50,7 @@
  struct thread_info {
  	unsigned long		flags;		/* low level flags */
@@ -508,9 +188,29 @@ diff -Nur linux-4.1.20.orig/arch/arm/include/asm/thread_info.h linux-4.1.20/arch
  #define _TIF_UPROBE		(1 << TIF_UPROBE)
  #define _TIF_SYSCALL_TRACE	(1 << TIF_SYSCALL_TRACE)
  #define _TIF_SYSCALL_AUDIT	(1 << TIF_SYSCALL_AUDIT)
-diff -Nur linux-4.1.20.orig/arch/arm/kernel/asm-offsets.c linux-4.1.20/arch/arm/kernel/asm-offsets.c
---- linux-4.1.20.orig/arch/arm/kernel/asm-offsets.c	2016-03-17 19:11:03.000000000 +0100
-+++ linux-4.1.20/arch/arm/kernel/asm-offsets.c	2016-03-21 20:18:28.000000000 +0100
+diff -Nur linux-4.1.26.orig/arch/arm/Kconfig linux-4.1.26/arch/arm/Kconfig
+--- linux-4.1.26.orig/arch/arm/Kconfig	2016-06-07 01:13:11.000000000 +0200
++++ linux-4.1.26/arch/arm/Kconfig	2016-06-19 15:30:54.919152041 +0200
+@@ -31,7 +31,7 @@
+ 	select HARDIRQS_SW_RESEND
+ 	select HAVE_ARCH_AUDITSYSCALL if (AEABI && !OABI_COMPAT)
+ 	select HAVE_ARCH_BITREVERSE if (CPU_32v7M || CPU_32v7) && !CPU_32v6
+-	select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
++	select HAVE_ARCH_JUMP_LABEL if (!XIP_KERNEL && !PREEMPT_RT_BASE)
+ 	select HAVE_ARCH_KGDB
+ 	select HAVE_ARCH_SECCOMP_FILTER if (AEABI && !OABI_COMPAT)
+ 	select HAVE_ARCH_TRACEHOOK
+@@ -66,6 +66,7 @@
+ 	select HAVE_PERF_EVENTS
+ 	select HAVE_PERF_REGS
+ 	select HAVE_PERF_USER_STACK_DUMP
++	select HAVE_PREEMPT_LAZY
+ 	select HAVE_RCU_TABLE_FREE if (SMP && ARM_LPAE)
+ 	select HAVE_REGS_AND_STACK_ACCESS_API
+ 	select HAVE_SYSCALL_TRACEPOINTS
+diff -Nur linux-4.1.26.orig/arch/arm/kernel/asm-offsets.c linux-4.1.26/arch/arm/kernel/asm-offsets.c
+--- linux-4.1.26.orig/arch/arm/kernel/asm-offsets.c	2016-06-07 01:13:11.000000000 +0200
++++ linux-4.1.26/arch/arm/kernel/asm-offsets.c	2016-06-19 15:30:54.919152041 +0200
 @@ -65,6 +65,7 @@
    BLANK();
    DEFINE(TI_FLAGS,		offsetof(struct thread_info, flags));
@@ -519,9 +219,9 @@ diff -Nur linux-4.1.20.orig/arch/arm/kernel/asm-offsets.c linux-4.1.20/arch/arm/
    DEFINE(TI_ADDR_LIMIT,		offsetof(struct thread_info, addr_limit));
    DEFINE(TI_TASK,		offsetof(struct thread_info, task));
    DEFINE(TI_CPU,		offsetof(struct thread_info, cpu));
-diff -Nur linux-4.1.20.orig/arch/arm/kernel/entry-armv.S linux-4.1.20/arch/arm/kernel/entry-armv.S
---- linux-4.1.20.orig/arch/arm/kernel/entry-armv.S	2016-03-17 19:11:03.000000000 +0100
-+++ linux-4.1.20/arch/arm/kernel/entry-armv.S	2016-03-21 20:18:28.000000000 +0100
+diff -Nur linux-4.1.26.orig/arch/arm/kernel/entry-armv.S linux-4.1.26/arch/arm/kernel/entry-armv.S
+--- linux-4.1.26.orig/arch/arm/kernel/entry-armv.S	2016-06-07 01:13:11.000000000 +0200
++++ linux-4.1.26/arch/arm/kernel/entry-armv.S	2016-06-19 15:30:54.919152041 +0200
 @@ -208,11 +208,18 @@
  #ifdef CONFIG_PREEMPT
  	get_thread_info tsk
@@ -552,9 +252,9 @@ diff -Nur linux-4.1.20.orig/arch/arm/kernel/entry-armv.S linux-4.1.20/arch/arm/k
  	reteq	r8				@ go again
  	b	1b
  #endif
-diff -Nur linux-4.1.20.orig/arch/arm/kernel/process.c linux-4.1.20/arch/arm/kernel/process.c
---- linux-4.1.20.orig/arch/arm/kernel/process.c	2016-03-17 19:11:03.000000000 +0100
-+++ linux-4.1.20/arch/arm/kernel/process.c	2016-03-21 20:18:28.000000000 +0100
+diff -Nur linux-4.1.26.orig/arch/arm/kernel/process.c linux-4.1.26/arch/arm/kernel/process.c
+--- linux-4.1.26.orig/arch/arm/kernel/process.c	2016-06-07 01:13:11.000000000 +0200
++++ linux-4.1.26/arch/arm/kernel/process.c	2016-06-19 15:30:54.919152041 +0200
 @@ -290,6 +290,30 @@
  }
  
@@ -586,9 +286,9 @@ diff -Nur linux-4.1.20.orig/arch/arm/kernel/process.c linux-4.1.20/arch/arm/kern
  #ifdef CONFIG_KUSER_HELPERS
  /*
   * The vectors page is always readable from user space for the
-diff -Nur linux-4.1.20.orig/arch/arm/kernel/signal.c linux-4.1.20/arch/arm/kernel/signal.c
---- linux-4.1.20.orig/arch/arm/kernel/signal.c	2016-03-17 19:11:03.000000000 +0100
-+++ linux-4.1.20/arch/arm/kernel/signal.c	2016-03-21 20:18:28.000000000 +0100
+diff -Nur linux-4.1.26.orig/arch/arm/kernel/signal.c linux-4.1.26/arch/arm/kernel/signal.c
+--- linux-4.1.26.orig/arch/arm/kernel/signal.c	2016-06-07 01:13:11.000000000 +0200
++++ linux-4.1.26/arch/arm/kernel/signal.c	2016-06-19 15:30:54.919152041 +0200
 @@ -568,7 +568,8 @@
  do_work_pending(struct pt_regs *regs, unsigned int thread_flags, int syscall)
  {
@@ -599,9 +299,9 @@ diff -Nur linux-4.1.20.orig/arch/arm/kernel/signal.c linux-4.1.20/arch/arm/kerne
  			schedule();
  		} else {
  			if (unlikely(!user_mode(regs)))
-diff -Nur linux-4.1.20.orig/arch/arm/kernel/smp.c linux-4.1.20/arch/arm/kernel/smp.c
---- linux-4.1.20.orig/arch/arm/kernel/smp.c	2016-03-17 19:11:03.000000000 +0100
-+++ linux-4.1.20/arch/arm/kernel/smp.c	2016-03-21 20:18:28.000000000 +0100
+diff -Nur linux-4.1.26.orig/arch/arm/kernel/smp.c linux-4.1.26/arch/arm/kernel/smp.c
+--- linux-4.1.26.orig/arch/arm/kernel/smp.c	2016-06-07 01:13:11.000000000 +0200
++++ linux-4.1.26/arch/arm/kernel/smp.c	2016-06-19 15:30:54.919152041 +0200
 @@ -213,8 +213,6 @@
  	flush_cache_louis();
  	local_flush_tlb_all();
@@ -621,9 +321,9 @@ diff -Nur linux-4.1.20.orig/arch/arm/kernel/smp.c linux-4.1.20/arch/arm/kernel/s
  	pr_notice("CPU%u: shutdown\n", cpu);
  
  	/*
-diff -Nur linux-4.1.20.orig/arch/arm/kernel/unwind.c linux-4.1.20/arch/arm/kernel/unwind.c
---- linux-4.1.20.orig/arch/arm/kernel/unwind.c	2016-03-17 19:11:03.000000000 +0100
-+++ linux-4.1.20/arch/arm/kernel/unwind.c	2016-03-21 20:18:28.000000000 +0100
+diff -Nur linux-4.1.26.orig/arch/arm/kernel/unwind.c linux-4.1.26/arch/arm/kernel/unwind.c
+--- linux-4.1.26.orig/arch/arm/kernel/unwind.c	2016-06-07 01:13:11.000000000 +0200
++++ linux-4.1.26/arch/arm/kernel/unwind.c	2016-06-19 15:30:54.919152041 +0200
 @@ -93,7 +93,7 @@
  static const struct unwind_idx *__origin_unwind_idx;
  extern const struct unwind_idx __stop_unwind_idx[];
@@ -675,9 +375,9 @@ diff -Nur linux-4.1.20.orig/arch/arm/kernel/unwind.c linux-4.1.20/arch/arm/kerne
  
  	kfree(tab);
  }
-diff -Nur linux-4.1.20.orig/arch/arm/kvm/arm.c linux-4.1.20/arch/arm/kvm/arm.c
---- linux-4.1.20.orig/arch/arm/kvm/arm.c	2016-03-17 19:11:03.000000000 +0100
-+++ linux-4.1.20/arch/arm/kvm/arm.c	2016-03-21 20:18:28.000000000 +0100
+diff -Nur linux-4.1.26.orig/arch/arm/kvm/arm.c linux-4.1.26/arch/arm/kvm/arm.c
+--- linux-4.1.26.orig/arch/arm/kvm/arm.c	2016-06-07 01:13:11.000000000 +0200
++++ linux-4.1.26/arch/arm/kvm/arm.c	2016-06-19 15:30:54.919152041 +0200
 @@ -474,9 +474,9 @@
  
  static void vcpu_pause(struct kvm_vcpu *vcpu)
@@ -690,9 +390,9 @@ diff -Nur linux-4.1.20.orig/arch/arm/kvm/arm.c linux-4.1.20/arch/arm/kvm/arm.c
  }
  
  static int kvm_vcpu_initialized(struct kvm_vcpu *vcpu)
-diff -Nur linux-4.1.20.orig/arch/arm/kvm/psci.c linux-4.1.20/arch/arm/kvm/psci.c
---- linux-4.1.20.orig/arch/arm/kvm/psci.c	2016-03-17 19:11:03.000000000 +0100
-+++ linux-4.1.20/arch/arm/kvm/psci.c	2016-03-21 20:18:28.000000000 +0100
+diff -Nur linux-4.1.26.orig/arch/arm/kvm/psci.c linux-4.1.26/arch/arm/kvm/psci.c
+--- linux-4.1.26.orig/arch/arm/kvm/psci.c	2016-06-07 01:13:11.000000000 +0200
++++ linux-4.1.26/arch/arm/kvm/psci.c	2016-06-19 15:30:54.919152041 +0200
 @@ -68,7 +68,7 @@
  {
  	struct kvm *kvm = source_vcpu->kvm;
@@ -711,9 +411,9 @@ diff -Nur linux-4.1.20.orig/arch/arm/kvm/psci.c linux-4.1.20/arch/arm/kvm/psci.c
  
  	return PSCI_RET_SUCCESS;
  }
-diff -Nur linux-4.1.20.orig/arch/arm/mach-exynos/platsmp.c linux-4.1.20/arch/arm/mach-exynos/platsmp.c
---- linux-4.1.20.orig/arch/arm/mach-exynos/platsmp.c	2016-03-17 19:11:03.000000000 +0100
-+++ linux-4.1.20/arch/arm/mach-exynos/platsmp.c	2016-03-21 20:18:28.000000000 +0100
+diff -Nur linux-4.1.26.orig/arch/arm/mach-exynos/platsmp.c linux-4.1.26/arch/arm/mach-exynos/platsmp.c
+--- linux-4.1.26.orig/arch/arm/mach-exynos/platsmp.c	2016-06-07 01:13:11.000000000 +0200
++++ linux-4.1.26/arch/arm/mach-exynos/platsmp.c	2016-06-19 15:30:54.919152041 +0200
 @@ -231,7 +231,7 @@
  	return (void __iomem *)(S5P_VA_SCU);
  }
@@ -761,9 +461,9 @@ diff -Nur linux-4.1.20.orig/arch/arm/mach-exynos/platsmp.c linux-4.1.20/arch/arm
  
  	return pen_release != -1 ? ret : 0;
  }
-diff -Nur linux-4.1.20.orig/arch/arm/mach-hisi/platmcpm.c linux-4.1.20/arch/arm/mach-hisi/platmcpm.c
---- linux-4.1.20.orig/arch/arm/mach-hisi/platmcpm.c	2016-03-17 19:11:03.000000000 +0100
-+++ linux-4.1.20/arch/arm/mach-hisi/platmcpm.c	2016-03-21 20:18:28.000000000 +0100
+diff -Nur linux-4.1.26.orig/arch/arm/mach-hisi/platmcpm.c linux-4.1.26/arch/arm/mach-hisi/platmcpm.c
+--- linux-4.1.26.orig/arch/arm/mach-hisi/platmcpm.c	2016-06-07 01:13:11.000000000 +0200
++++ linux-4.1.26/arch/arm/mach-hisi/platmcpm.c	2016-06-19 15:30:54.923152195 +0200
 @@ -57,7 +57,7 @@
  
  static void __iomem *sysctrl, *fabric;
@@ -866,9 +566,9 @@ diff -Nur linux-4.1.20.orig/arch/arm/mach-hisi/platmcpm.c linux-4.1.20/arch/arm/
  }
  
  static void __naked hip04_mcpm_power_up_setup(unsigned int affinity_level)
-diff -Nur linux-4.1.20.orig/arch/arm/mach-omap2/gpio.c linux-4.1.20/arch/arm/mach-omap2/gpio.c
---- linux-4.1.20.orig/arch/arm/mach-omap2/gpio.c	2016-03-17 19:11:03.000000000 +0100
-+++ linux-4.1.20/arch/arm/mach-omap2/gpio.c	2016-03-21 20:18:28.000000000 +0100
+diff -Nur linux-4.1.26.orig/arch/arm/mach-omap2/gpio.c linux-4.1.26/arch/arm/mach-omap2/gpio.c
+--- linux-4.1.26.orig/arch/arm/mach-omap2/gpio.c	2016-06-07 01:13:11.000000000 +0200
++++ linux-4.1.26/arch/arm/mach-omap2/gpio.c	2016-06-19 15:30:54.923152195 +0200
 @@ -130,7 +130,6 @@
  	}
  
@@ -877,9 +577,9 @@ diff -Nur linux-4.1.20.orig/arch/arm/mach-omap2/gpio.c linux-4.1.20/arch/arm/mac
  
  	pdev = omap_device_build(name, id - 1, oh, pdata, sizeof(*pdata));
  	kfree(pdata);
-diff -Nur linux-4.1.20.orig/arch/arm/mach-omap2/omap-smp.c linux-4.1.20/arch/arm/mach-omap2/omap-smp.c
---- linux-4.1.20.orig/arch/arm/mach-omap2/omap-smp.c	2016-03-17 19:11:03.000000000 +0100
-+++ linux-4.1.20/arch/arm/mach-omap2/omap-smp.c	2016-03-21 20:18:28.000000000 +0100
+diff -Nur linux-4.1.26.orig/arch/arm/mach-omap2/omap-smp.c linux-4.1.26/arch/arm/mach-omap2/omap-smp.c
+--- linux-4.1.26.orig/arch/arm/mach-omap2/omap-smp.c	2016-06-07 01:13:11.000000000 +0200
++++ linux-4.1.26/arch/arm/mach-omap2/omap-smp.c	2016-06-19 15:30:54.923152195 +0200
 @@ -43,7 +43,7 @@
  /* SCU base address */
  static void __iomem *scu_base;
@@ -918,9 +618,9 @@ diff -Nur linux-4.1.20.orig/arch/arm/mach-omap2/omap-smp.c linux-4.1.20/arch/arm
  
  	return 0;
  }
-diff -Nur linux-4.1.20.orig/arch/arm/mach-omap2/powerdomain.c linux-4.1.20/arch/arm/mach-omap2/powerdomain.c
---- linux-4.1.20.orig/arch/arm/mach-omap2/powerdomain.c	2016-03-17 19:11:03.000000000 +0100
-+++ linux-4.1.20/arch/arm/mach-omap2/powerdomain.c	2016-03-21 20:18:28.000000000 +0100
+diff -Nur linux-4.1.26.orig/arch/arm/mach-omap2/powerdomain.c linux-4.1.26/arch/arm/mach-omap2/powerdomain.c
+--- linux-4.1.26.orig/arch/arm/mach-omap2/powerdomain.c	2016-06-07 01:13:11.000000000 +0200
++++ linux-4.1.26/arch/arm/mach-omap2/powerdomain.c	2016-06-19 15:30:54.923152195 +0200
 @@ -1166,43 +1166,3 @@
  	return count;
  }
@@ -965,9 +665,9 @@ diff -Nur linux-4.1.20.orig/arch/arm/mach-omap2/powerdomain.c linux-4.1.20/arch/
 -
 -	return 0;
 -}
-diff -Nur linux-4.1.20.orig/arch/arm/mach-omap2/powerdomain.h linux-4.1.20/arch/arm/mach-omap2/powerdomain.h
---- linux-4.1.20.orig/arch/arm/mach-omap2/powerdomain.h	2016-03-17 19:11:03.000000000 +0100
-+++ linux-4.1.20/arch/arm/mach-omap2/powerdomain.h	2016-03-21 20:18:28.000000000 +0100
+diff -Nur linux-4.1.26.orig/arch/arm/mach-omap2/powerdomain.h linux-4.1.26/arch/arm/mach-omap2/powerdomain.h
+--- linux-4.1.26.orig/arch/arm/mach-omap2/powerdomain.h	2016-06-07 01:13:11.000000000 +0200
++++ linux-4.1.26/arch/arm/mach-omap2/powerdomain.h	2016-06-19 15:30:54.923152195 +0200
 @@ -244,7 +244,6 @@
  int pwrdm_pre_transition(struct powerdomain *pwrdm);
  int pwrdm_post_transition(struct powerdomain *pwrdm);
@@ -976,9 +676,9 @@ diff -Nur linux-4.1.20.orig/arch/arm/mach-omap2/powerdomain.h linux-4.1.20/arch/
  
  extern int omap_set_pwrdm_state(struct powerdomain *pwrdm, u8 state);
  
-diff -Nur linux-4.1.20.orig/arch/arm/mach-prima2/platsmp.c linux-4.1.20/arch/arm/mach-prima2/platsmp.c
---- linux-4.1.20.orig/arch/arm/mach-prima2/platsmp.c	2016-03-17 19:11:03.000000000 +0100
-+++ linux-4.1.20/arch/arm/mach-prima2/platsmp.c	2016-03-21 20:18:28.000000000 +0100
+diff -Nur linux-4.1.26.orig/arch/arm/mach-prima2/platsmp.c linux-4.1.26/arch/arm/mach-prima2/platsmp.c
+--- linux-4.1.26.orig/arch/arm/mach-prima2/platsmp.c	2016-06-07 01:13:11.000000000 +0200
++++ linux-4.1.26/arch/arm/mach-prima2/platsmp.c	2016-06-19 15:30:54.923152195 +0200
 @@ -22,7 +22,7 @@
  
  static void __iomem *clk_base;
@@ -1017,9 +717,9 @@ diff -Nur linux-4.1.20.orig/arch/arm/mach-prima2/platsmp.c linux-4.1.20/arch/arm
  
  	return pen_release != -1 ? -ENOSYS : 0;
  }
-diff -Nur linux-4.1.20.orig/arch/arm/mach-qcom/platsmp.c linux-4.1.20/arch/arm/mach-qcom/platsmp.c
---- linux-4.1.20.orig/arch/arm/mach-qcom/platsmp.c	2016-03-17 19:11:03.000000000 +0100
-+++ linux-4.1.20/arch/arm/mach-qcom/platsmp.c	2016-03-21 20:18:28.000000000 +0100
+diff -Nur linux-4.1.26.orig/arch/arm/mach-qcom/platsmp.c linux-4.1.26/arch/arm/mach-qcom/platsmp.c
+--- linux-4.1.26.orig/arch/arm/mach-qcom/platsmp.c	2016-06-07 01:13:11.000000000 +0200
++++ linux-4.1.26/arch/arm/mach-qcom/platsmp.c	2016-06-19 15:30:54.923152195 +0200
 @@ -46,7 +46,7 @@
  
  extern void secondary_startup_arm(void);
@@ -1058,9 +758,9 @@ diff -Nur linux-4.1.20.orig/arch/arm/mach-qcom/platsmp.c linux-4.1.20/arch/arm/m
  
  	return ret;
  }
-diff -Nur linux-4.1.20.orig/arch/arm/mach-spear/platsmp.c linux-4.1.20/arch/arm/mach-spear/platsmp.c
---- linux-4.1.20.orig/arch/arm/mach-spear/platsmp.c	2016-03-17 19:11:03.000000000 +0100
-+++ linux-4.1.20/arch/arm/mach-spear/platsmp.c	2016-03-21 20:18:28.000000000 +0100
+diff -Nur linux-4.1.26.orig/arch/arm/mach-spear/platsmp.c linux-4.1.26/arch/arm/mach-spear/platsmp.c
+--- linux-4.1.26.orig/arch/arm/mach-spear/platsmp.c	2016-06-07 01:13:11.000000000 +0200
++++ linux-4.1.26/arch/arm/mach-spear/platsmp.c	2016-06-19 15:30:54.923152195 +0200
 @@ -32,7 +32,7 @@
  	sync_cache_w(&pen_release);
  }
@@ -1099,9 +799,9 @@ diff -Nur linux-4.1.20.orig/arch/arm/mach-spear/platsmp.c linux-4.1.20/arch/arm/
  
  	return pen_release != -1 ? -ENOSYS : 0;
  }
-diff -Nur linux-4.1.20.orig/arch/arm/mach-sti/platsmp.c linux-4.1.20/arch/arm/mach-sti/platsmp.c
---- linux-4.1.20.orig/arch/arm/mach-sti/platsmp.c	2016-03-17 19:11:03.000000000 +0100
-+++ linux-4.1.20/arch/arm/mach-sti/platsmp.c	2016-03-21 20:18:28.000000000 +0100
+diff -Nur linux-4.1.26.orig/arch/arm/mach-sti/platsmp.c linux-4.1.26/arch/arm/mach-sti/platsmp.c
+--- linux-4.1.26.orig/arch/arm/mach-sti/platsmp.c	2016-06-07 01:13:11.000000000 +0200
++++ linux-4.1.26/arch/arm/mach-sti/platsmp.c	2016-06-19 15:30:54.923152195 +0200
 @@ -34,7 +34,7 @@
  	sync_cache_w(&pen_release);
  }
@@ -1140,9 +840,9 @@ diff -Nur linux-4.1.20.orig/arch/arm/mach-sti/platsmp.c linux-4.1.20/arch/arm/ma
  
  	return pen_release != -1 ? -ENOSYS : 0;
  }
-diff -Nur linux-4.1.20.orig/arch/arm/mach-ux500/platsmp.c linux-4.1.20/arch/arm/mach-ux500/platsmp.c
---- linux-4.1.20.orig/arch/arm/mach-ux500/platsmp.c	2016-03-17 19:11:03.000000000 +0100
-+++ linux-4.1.20/arch/arm/mach-ux500/platsmp.c	2016-03-21 20:18:28.000000000 +0100
+diff -Nur linux-4.1.26.orig/arch/arm/mach-ux500/platsmp.c linux-4.1.26/arch/arm/mach-ux500/platsmp.c
+--- linux-4.1.26.orig/arch/arm/mach-ux500/platsmp.c	2016-06-07 01:13:11.000000000 +0200
++++ linux-4.1.26/arch/arm/mach-ux500/platsmp.c	2016-06-19 15:30:54.923152195 +0200
 @@ -51,7 +51,7 @@