21 Mar, 2020
1 commit
-
The vDSO library should only include the necessary headers required for
a userspace library (UAPI and a minimal set of kernel headers). To make
this possible it is necessary to isolate from the kernel headers the
common parts that are strictly necessary to build the library.Split clocksource.h into linux and common headers to make the latter
suitable for inclusion in the vDSO library.Signed-off-by: Vincenzo Frascino
Signed-off-by: Thomas Gleixner
Link: https://lkml.kernel.org/r/20200320145351.32292-9-vincenzo.frascino@arm.com
18 Feb, 2020
2 commits
-
Move the time namespace indicator clock mode to the other ones for
consistency sake.Signed-off-by: Thomas Gleixner
Reviewed-by: Vincenzo Frascino
Link: https://lkml.kernel.org/r/20200207124403.656097274@linutronix.de -
Now that all architectures are converted to use the generic storage the
helpers and conditionals can be removed.Signed-off-by: Thomas Gleixner
Tested-by: Vincenzo Frascino
Reviewed-by: Vincenzo Frascino
Link: https://lkml.kernel.org/r/20200207124403.470699892@linutronix.de
17 Feb, 2020
2 commits
-
All architectures which use the generic VDSO code have their own storage
for the VDSO clock mode. That's pointless and just requires duplicate code.Provide generic storage for it. The new Kconfig symbol is intermediate and
will be removed once all architectures are converted over.Signed-off-by: Thomas Gleixner
Tested-by: Vincenzo Frascino
Reviewed-by: Vincenzo Frascino
Link: https://lkml.kernel.org/r/20200207124403.028046322@linutronix.de -
Reformat the struct definition, add missing member documentation.
No functional change.Signed-off-by: Thomas Gleixner
Reviewed-by: Vincenzo Frascino
Link: https://lkml.kernel.org/r/20200207124402.825471920@linutronix.de
26 Oct, 2018
1 commit
-
Pull timekeeping updates from Thomas Gleixner:
"The timers and timekeeping departement provides:- Another large y2038 update with further preparations for providing
the y2038 safe timespecs closer to the syscalls.- An overhaul of the SHCMT clocksource driver
- SPDX license identifier updates
- Small cleanups and fixes all over the place"
* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (31 commits)
tick/sched : Remove redundant cpu_online() check
clocksource/drivers/dw_apb: Add reset control
clocksource: Remove obsolete CLOCKSOURCE_OF_DECLARE
clocksource/drivers: Unify the names to timer-* format
clocksource/drivers/sh_cmt: Add R-Car gen3 support
dt-bindings: timer: renesas: cmt: document R-Car gen3 support
clocksource/drivers/sh_cmt: Properly line-wrap sh_cmt_of_table[] initializer
clocksource/drivers/sh_cmt: Fix clocksource width for 32-bit machines
clocksource/drivers/sh_cmt: Fixup for 64-bit machines
clocksource/drivers/sh_tmu: Convert to SPDX identifiers
clocksource/drivers/sh_mtu2: Convert to SPDX identifiers
clocksource/drivers/sh_cmt: Convert to SPDX identifiers
clocksource/drivers/renesas-ostm: Convert to SPDX identifiers
clocksource: Convert to using %pOFn instead of device_node.name
tick/broadcast: Remove redundant check
RISC-V: Request newstat syscalls
y2038: signal: Change rt_sigtimedwait to use __kernel_timespec
y2038: socket: Change recvmmsg to use __kernel_timespec
y2038: sched: Change sched_rr_get_interval to use __kernel_timespec
y2038: utimes: Rework #ifdef guards for compat syscalls
...
05 Oct, 2018
1 commit
-
Architectures have extra archdata in the clocksource, e.g. for VDSO
support. There are no sanity checks or general initializations for this
available. Add support for that.Signed-off-by: Thomas Gleixner
Acked-by: Andy Lutomirski
Acked-by: John Stultz
Cc: Peter Zijlstra
Cc: Matt Rickard
Cc: Stephen Boyd
Cc: Florian Weimer
Cc: "K. Y. Srinivasan"
Cc: Vitaly Kuznetsov
Cc: devel@linuxdriverproject.org
Cc: virtualization@lists.linux-foundation.org
Cc: Paolo Bonzini
Cc: Arnd Bergmann
Cc: Juergen Gross
Link: https://lkml.kernel.org/r/20180917130706.973042587@linutronix.de
03 Oct, 2018
1 commit
-
The macro CLOCKSOURCE_OF_DECLARE was renamed more TIMER_OF_DECLARE, and we
kept an alias CLOCKSOURCE_OF_DECLARE in order to smooth the transition for
drivers.This change was done 1.5 year ago, we can reasonably remove this backward
compatible macro as it is no longer used anywhere.Signed-off-by: Daniel Lezcano
20 Jul, 2018
1 commit
-
On some hardware with multiple clocksources, we have coarse grained
clocksources that support the CLOCK_SOURCE_SUSPEND_NONSTOP flag, but
which are less than ideal for timekeeping whereas other clocksources
can be better candidates but halt on suspend.Currently, the timekeeping core only supports timing suspend using
CLOCK_SOURCE_SUSPEND_NONSTOP clocksources if that clocksource is the
current clocksource for timekeeping.As a result, some architectures try to implement read_persistent_clock64()
using those non-stop clocksources, but isn't really ideal, which will
introduce more duplicate code. To fix this, provide logic to allow a
registered SUSPEND_NONSTOP clocksource, which isn't the current
clocksource, to be used to calculate the suspend time.Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: Miroslav Lichvar
Cc: Richard Cochran
Cc: Prarit Bhargava
Cc: Stephen Boyd
Cc: Daniel Lezcano
Reviewed-by: Thomas Gleixner
Reviewed-by: Daniel Lezcano
Suggested-by: Thomas Gleixner
Signed-off-by: Baolin Wang
[jstultz: minor tweaks to merge with previous resume changes]
Signed-off-by: John Stultz
02 Nov, 2017
1 commit
-
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.By default all files without license information are under the default
license of the kernel, which is GPL version 2.Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier. The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.How this work was done:
Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
- file had no licensing information it it.
- file was a */uapi/* one with no licensing information in it,
- file was a */uapi/* one with existing licensing information,Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne. Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed. Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.Criteria used to select files for SPDX license identifier tagging was:
- Files considered eligible had to be source code files.
- Make and config files were included as candidates if they contained >5
lines of source
- File already had some variant of a license header in it (even if
Reviewed-by: Philippe Ombredanne
Reviewed-by: Thomas Gleixner
Signed-off-by: Greg Kroah-Hartman
04 Jul, 2017
1 commit
-
Pull timer updates from Thomas Gleixner:
"A rather large update for timers/timekeeping:- compat syscall consolidation (Al Viro)
- Posix timer consolidation (Christoph Helwig / Thomas Gleixner)
- Cleanup of the device tree based initialization for clockevents and
clocksources (Daniel Lezcano)- Consolidation of the FTTMR010 clocksource/event driver (Linus
Walleij)- The usual set of small fixes and updates all over the place"
* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (93 commits)
timers: Make the cpu base lock raw
clocksource/drivers/mips-gic-timer: Fix an error code in 'gic_clocksource_of_init()'
clocksource/drivers/fsl_ftm_timer: Unmap region obtained by of_iomap
clocksource/drivers/tcb_clksrc: Make IO endian agnostic
clocksource/drivers/sun4i: Switch to the timer-of common init
clocksource/drivers/timer-of: Fix invalid iomap check
Revert "ktime: Simplify ktime_compare implementation"
clocksource/drivers: Fix uninitialized variable use in timer_of_init
kselftests: timers: Add test for frequency step
kselftests: timers: Fix inconsistency-check to not ignore first timestamp
time: Add warning about imminent deprecation of CONFIG_GENERIC_TIME_VSYSCALL_OLD
time: Clean up CLOCK_MONOTONIC_RAW time handling
posix-cpu-timers: Make timespec to nsec conversion safe
itimer: Make timeval to nsec conversion range limited
timers: Fix parameter description of try_to_del_timer_sync()
ktime: Simplify ktime_compare implementation
clocksource/drivers/fttmr010: Factor out clock read code
clocksource/drivers/fttmr010: Implement delay timer
clocksource/drivers: Add timer-of common init routine
clocksource/drivers/tcb_clksrc: Save timer context on suspend/resume
...
14 Jun, 2017
6 commits
-
The macro CLOCKSOURCE_OF_DECLARE has been rename to TIMER_OF_DECLARE.
In order to prevent conflicts for the next merge window, a temporary
alias has been added which will be removed later.Cc: Arnd Bergman
Signed-off-by: Daniel Lezcano -
The config option name is now renamed to 'TIMER_OF' for consistency with
the CLOCKSOURCE_OF_DECLARE => TIMER_OF_DECLARE change.Signed-off-by: Daniel Lezcano
Reviewed-by: Linus Walleij -
The table name is now renamed to 'timer' for consistency with
the CLOCKSOURCE_OF_DECLARE => TIMER_OF_DECLARE change.Signed-off-by: Daniel Lezcano
Reviewed-by: Linus Walleij -
The macro name is now renamed to 'TIMER_ACPI_DECLARE' for consistency
with the CLOCKSOURCE_OF_DECLARE => TIMER_OF_DECLARE change.Signed-off-by: Daniel Lezcano
Reviewed-by: Linus Walleij -
The function name is now renamed to 'timer_probe' for consistency with
the CLOCKSOURCE_OF_DECLARE => TIMER_OF_DECLARE change.Signed-off-by: Daniel Lezcano
Acked-by: Viresh Kumar
Acked-by: Heiko Stuebner
Reviewed-by: Linus Walleij -
The CLOCKSOURCE_OF_DECLARE macro is used widely for the timers to declare the
clocksource at early stage. However, this macro is also used to initialize
the clockevent if any, or the clockevent only.It was originally suggested to declare another macro to initialize a
clockevent, so in order to separate the two entities even they belong to the
same IP. This was not accepted because of the impact on the DT where splitting
a clocksource/clockevent definition does not make sense as it is a Linux
concept not a hardware description.On the other side, the clocksource has not interrupt declared while the
clockevent has, so it is easy from the driver to know if the description is
for a clockevent or a clocksource, IOW it could be implemented at the driver
level.So instead of dealing with a named clocksource macro, let's use a more generic
one: TIMER_OF_DECLARE.The patch has not functional changes.
Signed-off-by: Daniel Lezcano
Acked-by: Heiko Stuebner
Acked-by: Neil Armstrong
Acked-by: Arnd Bergmann
Acked-by: Matthias Brugger
Reviewed-by: Linus Walleij
15 May, 2017
1 commit
-
Currently we keep sched_clock_tick() active for stable TSC in order to
keep the per-CPU state semi up-to-date. The (obvious) problem is that
by the time we detect TSC is borked, our per-CPU state is also borked.So hook into the clocksource watchdog and call a method after we've
found it to still be stable.There's the obvious race where the TSC goes wonky between finding it
stable and us running the callback, but closing that is too much work
and not really worth it, since we're already detecting TSC wobbles
after the fact, so we cannot, per definition, fully avoid funny clock
values.And since the watchdog runs less often than the tick, this is also an
optimization.Signed-off-by: Peter Zijlstra (Intel)
Cc: Linus Torvalds
Cc: Mike Galbraith
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar
20 Apr, 2017
1 commit
-
Besides reusing existing code this removes the special case handling
for 64-bit masks, which causes clang to raise a shift count overflow
warning due to https://bugs.llvm.org//show_bug.cgi?id=10030.Suggested-by: Dmitry Torokhov
Signed-off-by: Matthias Kaehlcke
Cc: Grant Grundler
Cc: Greg Hackmann
Cc: Michael Davidson
Cc: John Stultz
Link: http://lkml.kernel.org/r/20170418233037.70990-1-mka@chromium.org
Signed-off-by: Thomas Gleixner
14 Jan, 2017
1 commit
-
PeterZ reported that we'd fail to mark the TSC unstable when the
clocksource watchdog finds it unsuitable.Allow a clocksource to run a custom action when its being marked
unstable and hook up the TSC unstable code.Reported-by: Peter Zijlstra (Intel)
Signed-off-by: Thomas Gleixner
Signed-off-by: Peter Zijlstra (Intel)
Cc: Linus Torvalds
Cc: Mike Galbraith
Cc: Peter Zijlstra
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar
25 Dec, 2016
1 commit
-
There is no point in having an extra type for extra confusion. u64 is
unambiguous.Conversion was done with the following coccinelle script:
@rem@
@@
-typedef u64 cycle_t;@fix@
typedef cycle_t;
@@
-cycle_t
+u64Signed-off-by: Thomas Gleixner
Cc: Peter Zijlstra
Cc: John Stultz
30 Nov, 2016
1 commit
-
The "cycles" argument should not be an absolute clocksource cycle
value, as the implementation's arithmetic will overflow relatively
easily with wide (64 bit) clocksource counters.For performance, the implementation is simple and fast, since the
function is intended for only relatively small delta values of
clocksource cycles.[jstultz: Fixed up to merge against HEAD & commit message tweaks,
also included rewording suggestion by Ingo]
Signed-off-by: Chris Metcalf
Signed-off-by: John Stultz
Cc: Prarit Bhargava
Cc: Richard Cochran
Link: http://lkml.kernel.org/r/1480372524-15181-4-git-send-email-john.stultz@linaro.org
Signed-off-by: Thomas Gleixner
28 Jun, 2016
2 commits
-
All the clocksource drivers's init function are now converted to return
an error code. CLOCKSOURCE_OF_DECLARE is no longer used as well as the
clksrc-of table.Let's convert back the names:
- CLOCKSOURCE_OF_DECLARE_RET => CLOCKSOURCE_OF_DECLARE
- clksrc-of-ret => clksrc-ofSigned-off-by: Daniel Lezcano
For exynos_mct and samsung_pwm_timer:
Acked-by: Krzysztof KozlowskiFor arch/arc:
Acked-by: Vineet GuptaFor mediatek driver:
Acked-by: Matthias BruggerFor the Rockchip-part
Acked-by: Heiko StuebnerFor STi :
Acked-by: Patrice ChotardFor the mps2-timer.c and versatile.c changes:
Acked-by: Liviu DudauFor the OXNAS part :
Acked-by: Neil ArmstrongFor LPC32xx driver:
Acked-by: Sylvain LemieuxFor Broadcom Kona timer change:
Acked-by: Ray JuiFor Sun4i and Sun5i:
Acked-by: Chen-Yu TsaiFor Meson6:
Acked-by: Carlo CaioneFor Keystone:
Acked-by: Santosh ShilimkarFor NPS:
Acked-by: Noam CamusFor bcm2835:
Acked-by: Eric Anholt -
Currently, the clksrc-probe is not able to handle any error from the init
functions. There are different issues with the current code:
- the code is duplicated in the init functions by writing error
- every driver tends to panic in its own init function
- counting the number of clocksources is not reliableThis patch adds another table to store the functions returning an error.
The table is temporary while we convert all the drivers to return an error
and will disappear.Signed-off-by: Daniel Lezcano
23 Apr, 2016
1 commit
-
This header uses OF_DELCARE_1 which is defined in linux/of.h.
This fixes getting unhelpful compiler error messages about missing ')'
before a string constant.Cc: Prarit Bhargava
Cc: Richard Cochran
Cc: Thomas Gleixner
Cc: Ingo Molnar
Signed-off-by: David Lechner
Signed-off-by: John Stultz
27 Feb, 2016
1 commit
-
The clocksource_khz2mult() and clocksource_hz2mult() share similar
code wihch calculates a mult from the given frequency. Both implementations
in differ only in value of a frequency. This patch introduces the
clocksource_freq2mult() helper with generic implementation of
mult calculation to prevent code duplication.Signed-off-by: Alexander Kuleshov
Signed-off-by: John Stultz
Cc: Prarit Bhargava
Cc: Richard Cochran
Link: http://lkml.kernel.org/r/1456542854-22104-2-git-send-email-john.stultz@linaro.org
Signed-off-by: Thomas Gleixner
26 Nov, 2015
1 commit
-
We cache all hotpath members of a clocksource in the time keeper
core. So there is no requirement in general to cache line align struct
clocksource. Remove the enforces alignment.That allows users which need to wrap struct clocksource into their own
struct to align the struct without getting extra padding.Signed-off-by: Thomas Gleixner
Cc: John Stultz
Cc: Russell King - ARM Linux
Cc: Marc Gonzalez
Cc: Daniel Lezcano
Cc: Mans Rullgard
Cc: Viresh Kumar
Cc: Nicolas Pitre
Cc: Tony Lindgren
Cc: Sebastian Frias
Link: http://lkml.kernel.org/r/alpine.DEB.2.11.1511191209000.3898@nanos
01 Oct, 2015
4 commits
-
Seeing the 'of' characters in a symbol that is being called from
ACPI seems to freak out people. So let's do a bit of pointless
renaming so that these folks do feel at home.Signed-off-by: Marc Zyngier
Acked-by: Catalin Marinas
Reviewed-by: Hanjun Guo
Acked-by: Thomas Gleixner
Tested-by: Hanjun Guo
Signed-off-by: Rafael J. Wysocki -
It is now absolutely trivial to convert the arch timer driver to
use ACPI probing, just like its DT counterpart.Let's enjoy another crapectomy.
Signed-off-by: Marc Zyngier
Acked-by: Catalin Marinas
Acked-by: Thomas Gleixner
Tested-by: Hanjun Guo
Signed-off-by: Rafael J. Wysocki -
The clocksource probing infrastructure currently depends on
CONFIG_CLKSRC_OF, which depends on CONFIG_OF. In order to make
this infrastructure selectable even if CONFIG_OF is not selected,
introduce a new CONFIG_CLKSRC_PROBE (which allow the infrastructure
to be compiled in), and CONFIG_CLKSRC_ACPI (which is the pendent
of CONFIG_CLKSRC_OF for ACPI).Signed-off-by: Marc Zyngier
Acked-by: Thomas Gleixner
Tested-by: Hanjun Guo
Signed-off-by: Rafael J. Wysocki -
DT enjoys a rather nice probing infrastructure for clocksources,
while ACPI is so far stuck into a very distant past.This patch introduces a declarative API, allowing clocksources
to be self-contained and be called when parsing the GTDT table.Signed-off-by: Marc Zyngier
Acked-by: Thomas Gleixner
Tested-by: Hanjun Guo
Signed-off-by: Rafael J. Wysocki
19 May, 2015
1 commit
-
Make sure the upstream fixes are applied before adding further
modifications.
24 Apr, 2015
1 commit
-
Pull initial ACPI support for arm64 from Will Deacon:
"This series introduces preliminary ACPI 5.1 support to the arm64
kernel using the "hardware reduced" profile. We don't support any
peripherals yet, so it's fairly limited in scope:- MEMORY init (UEFI)
- ACPI discovery (RSDP via UEFI)
- CPU init (FADT)
- GIC init (MADT)
- SMP boot (MADT + PSCI)
- ACPI Kconfig options (dependent on EXPERT)
ACPI for arm64 has been in development for a while now and hardware
has been available that can boot with either FDT or ACPI tables. This
has been made possible by both changes to the ACPI spec to cater for
ARM-based machines (known as "hardware-reduced" in ACPI parlance) but
also a Linaro-driven effort to get this supported on top of the Linux
kernel. This pull request is the result of that work.These changes allow us to initialise the CPUs, interrupt controller,
and timers via ACPI tables, with memory information and cmdline coming
from EFI. We don't support a hybrid ACPI/FDT scheme. Of course,
there is still plenty of work to do (a serial console would be nice!)
but I expect that to happen on a per-driver basis after this core
series has been merged.Anyway, the diff stat here is fairly horrible, but splitting this up
and merging it via all the different subsystems would have been
extremely painful. Instead, we've got all the relevant Acks in place
and I've not seen anything other than trivial (Kconfig) conflicts in
-next (for completeness, I've included my resolution below). Nearly
half of the insertions fall under Documentation/.So, we'll see how this goes. Right now, it all depends on EXPERT and
I fully expect people to use FDT by default for the immediate future"* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (31 commits)
ARM64 / ACPI: make acpi_map_gic_cpu_interface() as void function
ARM64 / ACPI: Ignore the return error value of acpi_map_gic_cpu_interface()
ARM64 / ACPI: fix usage of acpi_map_gic_cpu_interface
ARM64: kernel: acpi: honour acpi=force command line parameter
ARM64: kernel: acpi: refactor ACPI tables init and checks
ARM64: kernel: psci: let ACPI probe PSCI version
ARM64: kernel: psci: factor out probe function
ACPI: move arm64 GSI IRQ model to generic GSI IRQ layer
ARM64 / ACPI: Don't unflatten device tree if acpi=force is passed
ARM64 / ACPI: additions of ACPI documentation for arm64
Documentation: ACPI for ARM64
ARM64 / ACPI: Enable ARM64 in Kconfig
XEN / ACPI: Make XEN ACPI depend on X86
ARM64 / ACPI: Select ACPI_REDUCED_HARDWARE_ONLY if ACPI is enabled on ARM64
clocksource / arch_timer: Parse GTDT to initialize arch timer
irqchip: Add GICv2 specific ACPI boot support
ARM64 / ACPI: Introduce ACPI_IRQ_MODEL_GIC and register device's gsi
ACPI / processor: Make it possible to get CPU hardware ID via GICC
ACPI / processor: Introduce phys_cpuid_t for CPU hardware ID
ARM64 / ACPI: Parse MADT for SMP initialization
...
22 Apr, 2015
1 commit
-
The function clocksource_get_next() was removed in commit 75c5158f70
(timekeeping: Update clocksource with stop_machine), but the
prototype was not removed with it. Remove the prototype.Signed-off-by: Yingjoe Chen
Cc:
Cc: Martin Schwidefsky
Cc:
Cc: John Stultz
Link: http://lkml.kernel.org/r/1428674150-1780-1-git-send-email-yingjoe.chen@mediatek.com
Signed-off-by: Thomas Gleixner
26 Mar, 2015
1 commit
-
Using the information presented by GTDT (Generic Timer Description Table)
to initialize the arch timer (not memory-mapped).CC: Daniel Lezcano
CC: Thomas Gleixner
Originally-by: Amit Daniel Kachhap
Tested-by: Suravee Suthikulpanit
Tested-by: Yijing Wang
Tested-by: Mark Langsdorf
Tested-by: Jon Masters
Tested-by: Timur Tabi
Tested-by: Robert Richter
Acked-by: Robert Richter
Acked-by: Daniel Lezcano
Reviewed-by: Grant Likely
Signed-off-by: Hanjun Guo
Signed-off-by: Will Deacon
13 Mar, 2015
2 commits
-
Ingo requested this function be renamed to improve readability,
so I've renamed __clocksource_updatefreq_scale() as well as the
__clocksource_updatefreq_hz/khz() functions to avoid
squishedtogethernames.This touches some of the sh clocksources, which I've not tested.
The arch/arm/plat-omap change is just a comment change for
consistency.Signed-off-by: John Stultz
Cc: Daniel Lezcano
Cc: Dave Jones
Cc: Linus Torvalds
Cc: Peter Zijlstra
Cc: Prarit Bhargava
Cc: Richard Cochran
Cc: Stephen Boyd
Cc: Thomas Gleixner
Link: http://lkml.kernel.org/r/1426133800-29329-13-git-send-email-john.stultz@linaro.org
Signed-off-by: Ingo Molnar -
A long running project has been to clean up remaining uses
of clocksource_register(), replacing it with the simpler
clocksource_register_khz/hz() functions.However, there are a few cases where we need to self-define
our mult/shift values, so switch the function to a more
obviously internal __clocksource_register() name, and
consolidate much of the internal logic so we don't have
duplication.Signed-off-by: John Stultz
Cc: Dave Jones
Cc: David S. Miller
Cc: Linus Torvalds
Cc: Martin Schwidefsky
Cc: Peter Zijlstra
Cc: Prarit Bhargava
Cc: Richard Cochran
Cc: Stephen Boyd
Cc: Thomas Gleixner
Link: http://lkml.kernel.org/r/1426133800-29329-10-git-send-email-john.stultz@linaro.org
[ Minor cleanups. ]
Signed-off-by: Ingo Molnar
12 Mar, 2015
1 commit
-
In order to facilitate clocksource validation, add a
'max_cycles' field to the clocksource structure which
will hold the maximum cycle value that can safely be
multiplied without potentially causing an overflow.Signed-off-by: John Stultz
Cc: Dave Jones
Cc: Linus Torvalds
Cc: Peter Zijlstra
Cc: Prarit Bhargava
Cc: Richard Cochran
Cc: Stephen Boyd
Cc: Thomas Gleixner
Link: http://lkml.kernel.org/r/1426133800-29329-4-git-send-email-john.stultz@linaro.org
Signed-off-by: Ingo Molnar
31 Dec, 2014
1 commit
-
The timecounter code has almost nothing to do with the clocksource
code. Let it live in its own file. This will help isolate the
timecounter users from the clocksource users in the source tree.Signed-off-by: Richard Cochran
Acked-by: Jeff Kirsher
Signed-off-by: David S. Miller
23 Oct, 2014
1 commit
-
kernel/time/jiffies.c provides a default clocksource_default_clock()
definition explicitly marked "weak". arch/s390 provides its own definition
intended to override the default, but the "weak" attribute on the
declaration applied to the s390 definition as well, so the linker chose one
based on link order (see 10629d711ed7 ("PCI: Remove __weak annotation from
pcibios_get_phb_of_node decl")).Remove the "weak" attribute from the clocksource_default_clock()
declaration so we always prefer a non-weak definition over the weak one,
independent of link order.Fixes: f1b82746c1e9 ("clocksource: Cleanup clocksource selection")
Signed-off-by: Bjorn Helgaas
Acked-by: John Stultz
Acked-by: Ingo Molnar
CC: Daniel Lezcano
CC: Martin Schwidefsky
