linux-kernel - Re: [PATCH v3 13/13] clocksource/drivers/rockchip

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Message-Id: <3CA13FA3-1110-4833-B844-446AF16931C5@gmail.com>
Date:   Tue, 29 Nov 2016 18:36:11 +0300
From:   Alexander Kochetkov <al.kochet@...il.com>
To:     Heiko Stübner <heiko@...ech.de>
Cc:     LKML <linux-kernel@...r.kernel.org>, devicetree@...r.kernel.org,
        LAK <linux-arm-kernel@...ts.infradead.org>,
        linux-rockchip@...ts.infradead.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Caesar Wang <wxt@...k-chips.com>,
        Huang Tao <huangtao@...k-chips.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>
Subject: Re: [PATCH v3 13/13] clocksource/drivers/rockchip_timer: Prevent ftrace recursion

Hello Heiko!
Thank you for patch review!

> 29 нояб. 2016 г., в 18:01, Heiko Stübner <heiko@...ech.de> написал(а):
> 
> you introduced the issue yourself in patch 11/13. In general any patch should 
> never leave the kernel in a worse state than it was before, so no patch should 
> ever introduce known issues itself.

Agree.

> In that line of thought, don't patches 10+11 introduce warnings about unused 
> functions as well when applied without patch 12?
7 - yes
10 - not
11 - yes

> 29 нояб. 2016 г., в 18:03, Heiko Stübner <heiko@...ech.de> написал(а):
> 
> Then why do you need another patch to remove them and don't do that in the 
> patch removing their respective usage?


To make 7 more readable. Overwise patch messed up and unreadable.
It’s hard to track what going on in the patch.

> Maybe merge them?

I'll merge all of them.

P.S.
here comment from another thead about the patches.
http://lists.infradead.org/pipermail/linux-arm-kernel/2016-November/thread.html#470957

> 29 нояб. 2016 г., в 18:07, Robin Murphy <robin.murphy@....com> написал(а):
> 
> 3288 (and probably anything newer) is irrelevant to this discussion, as
> it has the arch timer interface - that may be busted in other ways (such
> as not being correctly set up by firmware and not being always-on as it
> should), but frequency is not one of them. This only affects
> Cortex-A9/A5 based parts.


So I update comments for patches.

Looks, like I study archeology with my patches, as all new ARM chips not
affected by the problem anymore.

Regards,
Alexander.