linux-kernel - Re: [PATCH 1/2] amba: Add dev_is_amba() function and export it for modules

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Message-ID: <e3688d85-5cab-41b9-a77f-d1229d9c3b5c@linux.dev>
Date: Mon, 30 Sep 2024 09:39:00 +0800
From: Kunwu Chan <kunwu.chan@...ux.dev>
To: "Russell King (Oracle)" <linux@...linux.org.uk>,
 Rob Herring <robh@...nel.org>
Cc: saravanak@...gle.com, linux-kernel@...r.kernel.org,
 devicetree@...r.kernel.org,
 Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: Re: [PATCH 1/2] amba: Add dev_is_amba() function and export it for
 modules

Thanks for the reply.

On 2024/9/25 06:43, Russell King (Oracle) wrote:
> On Tue, Sep 24, 2024 at 05:28:57PM -0500, Rob Herring wrote:
>> On Mon, Sep 23, 2024 at 05:42:47PM +0800, Kunwu Chan wrote:
>>> Add dev_is_amba() function to determine
>>> whether the device is a AMBA device.
>>>
>>> Suggested-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
>>> Signed-off-by: Kunwu Chan <chentao@...inos.cn>
>>> ---
>>>   drivers/amba/bus.c       | 6 ++++++
>>>   include/linux/amba/bus.h | 5 +++++
>>>   2 files changed, 11 insertions(+)
>> Russell, Can I get an ack for this to take it with patch #2.
> Would be nice to discuss "how shall we merge this cross-subsystem
> patch series" first, hmm?
>
> The reason I didn't take patch 1 originally is because it was submitted
> to me without any users, and the general principle is not to accept
> patches without users. Too many times, I've merged code where there's
> been a "promise" that it will be used, only to have the author go
> silent and users never come along. So now, my rule is... any code that
> adds something must also come with its user.
>
Just one user in drivers/of/platform.c right now.

Actually, I don't know if dev_is_amba will use it more in the future.

So we keep the usage of  "dev->bus == &platform_bus_type " too?
Although here come a wrapper function "dev_is_platform".

-- 
Thanks,
   Kunwu.Chan