Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

Pull timer and time updates from Thomas Gleixner:
 "A rather large update of timers, timekeeping & co

   - Core timekeeping code is year-2038 safe now for 32bit machines.
     Now we just need to fix all in kernel users and the gazillion of
     user space interfaces which rely on timespec/timeval :)

   - Better cache layout for the timekeeping internal data structures.

   - Proper nanosecond based interfaces for in kernel users.

   - Tree wide cleanup of code which wants nanoseconds but does hoops
     and loops to convert back and forth from timespecs.  Some of it
     definitely belongs into the ugly code museum.

   - Consolidation of the timekeeping interface zoo.

   - A fast NMI safe accessor to clock monotonic for tracing.  This is a
     long standing request to support correlated user/kernel space
     traces.  With proper NTP frequency correction it's also suitable
     for correlation of traces accross separate machines.

   - Checkpoint/restart support for timerfd.

   - A few NOHZ[_FULL] improvements in the [hr]timer code.

   - Code move from kernel to kernel/time of all time* related code.

   - New clocksource/event drivers from the ARM universe.  I'm really
     impressed that despite an architected timer in the newer chips SoC
     manufacturers insist on inventing new and differently broken SoC
     specific timers.

[ Ed. "Impressed"? I don't think that word means what you think it means ]

   - Another round of code move from arch to drivers.  Looks like most
     of the legacy mess in ARM regarding timers is sorted out except for
     a few obnoxious strongholds.

   - The usual updates and fixlets all over the place"

* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (114 commits)
  timekeeping: Fixup typo in update_vsyscall_old definition
  clocksource: document some basic timekeeping concepts
  timekeeping: Use cached ntp_tick_length when accumulating error
  timekeeping: Rework frequency adjustments to work better w/ nohz
  timekeeping: Minor fixup for timespec64->timespec assignment
  ftrace: Provide trace clocks monotonic
  timekeeping: Provide fast and NMI safe access to CLOCK_MONOTONIC
  seqcount: Add raw_write_seqcount_latch()
  seqcount: Provide raw_read_seqcount()
  timekeeping: Use tk_read_base as argument for timekeeping_get_ns()
  timekeeping: Create struct tk_read_base and use it in struct timekeeper
  timekeeping: Restructure the timekeeper some more
  clocksource: Get rid of cycle_last
  clocksource: Move cycle_last validation to core code
  clocksource: Make delta calculation a function
  wireless: ath9k: Get rid of timespec conversions
  drm: vmwgfx: Use nsec based interfaces
  drm: i915: Use nsec based interfaces
  timekeeping: Provide ktime_get_raw()
  hangcheck-timer: Use ktime_get_ns()
  ...

diff --cc Documentation/DocBook/device-drivers.tmpl
Simple merge

diff --cc Documentation/devicetree/bindings/vendor-prefixes.txt
Simple merge

diff --cc MAINTAINERS
Simple merge

diff --cc arch/arm/Kconfig
Simple merge

diff --cc arch/arm64/kernel/vdso.c
Simple merge

diff --cc arch/s390/Kconfig
Simple merge

diff --cc arch/x86/Kconfig
Simple merge

diff --cc arch/x86/kernel/tsc.c
Simple merge

diff --cc arch/x86/kvm/x86.c
Simple merge

diff --cc drivers/gpu/drm/i915/i915_gem.c
Simple merge

diff --cc include/linux/sched.h
Simple merge

diff --cc include/linux/seqlock.h
Simple merge

diff --cc kernel/fork.c
Simple merge

diff --cc kernel/trace/trace.c
index 8bb80fe08767f462a1f72552635a4bf04133b8f8,84e2b45c09345daeb167fc207d87c028dab45d32..8a528392b1f465da19d297a84699c4931102cf3d
--- 1/kernel/trace/trace.c
--- 2/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@@ -820,11 -806,12 +820,12 @@@ static struct 
        const char *name;
        int in_ns;              /* is this clock in nanoseconds? */
  } trace_clocks[] = {
-       { trace_clock_local,    "local",        1 },
-       { trace_clock_global,   "global",       1 },
-       { trace_clock_counter,  "counter",      0 },
-       { trace_clock_jiffies,  "uptime",       0 },
-       { trace_clock,          "perf",         1 },
+       { trace_clock_local,            "local",        1 },
+       { trace_clock_global,           "global",       1 },
+       { trace_clock_counter,          "counter",      0 },
 -      { trace_clock_jiffies,          "uptime",       1 },
++      { trace_clock_jiffies,          "uptime",       0 },
+       { trace_clock,                  "perf",         1 },
+       { ktime_get_mono_fast_ns,       "mono",         1 },
        ARCH_TRACE_CLOCKS
  };
  

diff --cc lib/Kconfig.debug
index f8f45ec0ed460354ab3314c39e62d62754b232f2,24a26ad5c99dfa3aaade0c331c328a8e786ea343..1f630ad31fc2484e33ef21f688c7a9bd105f87ba
--- 1/lib/Kconfig.debug
--- 2/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@@ -1635,19 -1649,15 +1635,28 @@@ config TEST_BP
  
          If unsure, say N.
  
 +config TEST_FIRMWARE
 +      tristate "Test firmware loading via userspace interface"
 +      default n
 +      depends on FW_LOADER
 +      help
 +        This builds the "test_firmware" module that creates a userspace
 +        interface for testing firmware loading. This can be used to
 +        control the triggering of firmware loading without needing an
 +        actual firmware-using device. The contents can be rechecked by
 +        userspace.
 +
 +        If unsure, say N.
 +
+ config TEST_UDELAY
+       tristate "udelay test driver"
+       default n
+       help
+         This builds the "udelay_test" module that helps to make sure
+         that udelay() is working properly.
+ 
+         If unsure, say N.
+ 
  source "samples/Kconfig"
  
  source "lib/Kconfig.kgdb"

diff --cc lib/devres.c
Simple merge