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

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()
  ...

1 files changed, 12 insertions, 2 deletions

diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 065131cbfcc0..cfd6519df661 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -1,3 +1,5 @@
+menu "Clock Source drivers"
+
 config CLKSRC_OF
 	bool
 
@@ -125,6 +127,7 @@ config CLKSRC_METAG_GENERIC
 
 config CLKSRC_EXYNOS_MCT
 	def_bool y if ARCH_EXYNOS
+	depends on !ARM64
 	help
 	  Support for Multi Core Timer controller on Exynos SoCs.
 
@@ -149,6 +152,11 @@ config VF_PIT_TIMER
 config SYS_SUPPORTS_SH_CMT
         bool
 
+config MTK_TIMER
+	select CLKSRC_OF
+	select CLKSRC_MMIO
+	bool
+
 config SYS_SUPPORTS_SH_MTU2
         bool
 
@@ -173,7 +181,7 @@ config SH_TIMER_MTU2
 	default SYS_SUPPORTS_SH_MTU2
 	help
 	  This enables build of a clockevent driver for the Multi-Function
-	  Timer Pulse Unit 2 (TMU2) hardware available on SoCs from Renesas.
+	  Timer Pulse Unit 2 (MTU2) hardware available on SoCs from Renesas.
 	  This hardware comes with 16 bit-timer registers.
 
 config SH_TIMER_TMU
@@ -187,7 +195,7 @@ config SH_TIMER_TMU
 
 config EM_TIMER_STI
 	bool "Renesas STI timer driver" if COMPILE_TEST
-	depends on GENERIC_CLOCKEVENTS
+	depends on GENERIC_CLOCKEVENTS && HAS_IOMEM
 	default SYS_SUPPORTS_EM_STI
 	help
 	  This enables build of a clocksource and clockevent driver for
@@ -207,3 +215,5 @@ config CLKSRC_VERSATILE
 	  counter available in the "System Registers" block of
 	  ARM Versatile, RealView and Versatile Express reference
 	  platforms.
+
+endmenu