linux-kernel - Re: [PATCH 0/5] Fix race in hrtimer broadcast and take care of dependencies

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Date:	Thu, 18 Jun 2015 13:36:03 +0530
From:	Preeti U Murthy <preeti@...ux.vnet.ibm.com>
To:	stable@...r.kernel.org
CC:	mingo@...nel.org, Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/5] Fix race in hrtimer broadcast and take care of dependencies

A reminder to pick this series up for stable-4.0

On 05/13/2015 05:19 PM, Preeti U Murthy wrote:
> The intention was to backport only PATCH[5/5]: clockevents: Fix
> cpu_down() race for hrtimer based broadcasting,
> 
> but this depends on commits upstream which did cleanup and
> reorganization of code. However these commits cannot be cherry-picked as
> is. There are a few minor changes upstream and hence these commits had
> to be backported too. Reasons for backports are given below:
> 
> 1. PATCH[1/5]: The upstream commit introduced a duplicate function which
> was removed much later by commit:
> 
>         9eed56e889d: clockevents: Clean up clockchips.h
> 
> We do not need to cherry-pick the entire above commit because the backport
> was a simple one.
> 
> 2. PATCH[3/5]: There are newer functions introduced upstream through
> 
>         554ef3876c6: clockevents: Handle tick device's resume separately
> 
> Yet again we did not need to cherry pick the entire above commit,
> firstly because it introduces significant new code, secondly because the
> backport was a simple one.
> 
> 3. PATCH[4/5]: The function clockevent_set_mode() was renamed to
> clockevent_set_state() upstream by commit:
> 
>         77e32c89a7: clockevents: Manage device's state separately for
>                     the core
> 
> We do not need to cherry-pick this commit for the same reason as in (2).
> 
> This series needs to be applied on top of stable-4.0. 
> ---
> 
> Preeti U Murthy (1):
>       clockevents: Fix cpu_down() race for hrtimer based broadcasting
> 
> Thomas Gleixner (4):
>       clockevents: Remove CONFIG_GENERIC_CLOCKEVENTS_BUILD
>       tick: Move clocksource related stuff to timekeeping.h
>       tick: Simplify tick-internal.h
>       tick: Move core only declarations and functions to core
> 
> 
>  include/linux/clockchips.h   |   23 ++----
>  include/linux/tick.h         |  138 ++++++-----------------------------
>  kernel/cpu.c                 |    2 +
>  kernel/time/Kconfig          |    6 --
>  kernel/time/Makefile         |    6 +-
>  kernel/time/clockevents.c    |    3 -
>  kernel/time/hrtimer.c        |    2 -
>  kernel/time/jiffies.c        |    2 -
>  kernel/time/ntp.c            |    1 
>  kernel/time/tick-broadcast.c |   19 +++--
>  kernel/time/tick-internal.h  |  166 ++++++++++++++++--------------------------
>  kernel/time/tick-sched.c     |    7 ++
>  kernel/time/tick-sched.h     |   64 ++++++++++++++++
>  kernel/time/timekeeping.h    |    7 ++
>  kernel/time/timer_list.c     |    2 -
>  15 files changed, 190 insertions(+), 258 deletions(-)
>  create mode 100644 kernel/time/tick-sched.h
> 
> --
> 

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