linux-kernel - Re: [PATCH 1/3] timekeeping: Introduce fast accessor to clock tai

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Date:   Tue, 12 Apr 2022 09:03:42 +0200
From:   Kurt Kanzenbach <kurt@...utronix.de>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Steven Rostedt <rostedt@...dmis.org>
Cc:     John Stultz <john.stultz@...aro.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Ingo Molnar <mingo@...hat.com>,
        Jonathan Corbet <corbet@....net>,
        Richard Cochran <richardcochran@...il.com>,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] timekeeping: Introduce fast accessor to clock tai

On Mon Apr 11 2022, Thomas Gleixner wrote:
> On Sat, Apr 09 2022 at 22:33, Thomas Gleixner wrote:
>> On Sat, Apr 09 2022 at 09:37, Steven Rostedt wrote:
>>> On Sat,  9 Apr 2022 10:12:58 +0200
>>> Kurt Kanzenbach <kurt@...utronix.de> wrote:
>>>
>>>> ---
>>>>  include/linux/timekeeping.h |  1 +
>>>>  kernel/time/timekeeping.c   | 17 +++++++++++++++++
>>>>  2 files changed, 18 insertions(+)
>>>
>>> If the time keeping folks are OK with this and ack it, I'm happy to
>>> take this through my tree.
>>
>> Go ahead. I just sent a Reviewed-by and I don't see conflicting changes
>> in that area. Famous last words :)
>
> And yes, I have some conflicting changes in the pipeline and just saw
> that this lacks a data_race() annotation like the boot variant from
> which this is derived.

Interesting, didn't see that annotation. Anyway, this patch also misses
the corresponding documentation entry. See below.

Thanks,
Kurt

diff --git a/Documentation/core-api/timekeeping.rst b/Documentation/core-api/timekeeping.rst
index 729e24864fe7..22ec68f24421 100644
--- a/Documentation/core-api/timekeeping.rst
+++ b/Documentation/core-api/timekeeping.rst
@@ -132,6 +132,7 @@ Some additional variants exist for more specialized cases:
 .. c:function:: u64 ktime_get_mono_fast_ns( void )
                u64 ktime_get_raw_fast_ns( void )
                u64 ktime_get_boot_fast_ns( void )
+               u64 ktime_get_tai_fast_ns( void )
                u64 ktime_get_real_fast_ns( void )

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