linux-kernel - Re: [PATCH v4 03/13] media: pci: cx18-av-vbi: Replace open-coded parity calculation with parity

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Message-ID: <1961e19ee10.279b.9b12b7fc0a3841636cfb5e919b41b954@broadcom.com>
Date: Thu, 10 Apr 2025 07:08:58 +0200
From: Arend Van Spriel <arend.vanspriel@...adcom.com>
To: Johannes Berg <johannes@...solutions.net>, "Kuan-Wei Chiu" <visitorckw@...il.com>, <tglx@...utronix.de>, <mingo@...hat.com>, <bp@...en8.de>, <dave.hansen@...ux.intel.com>, <x86@...nel.org>, <jk@...abs.org>, <joel@....id.au>, <eajames@...ux.ibm.com>, <andrzej.hajda@...el.com>, <neil.armstrong@...aro.org>, <rfoss@...nel.org>, <maarten.lankhorst@...ux.intel.com>, <mripard@...nel.org>, <tzimmermann@...e.de>, <airlied@...il.com>, <simona@...ll.ch>, <dmitry.torokhov@...il.com>, <mchehab@...nel.org>, <awalls@...metrocast.net>, <hverkuil@...all.nl>, <miquel.raynal@...tlin.com>, <richard@....at>, <vigneshr@...com>, <louis.peens@...igine.com>, <andrew+netdev@...n.ch>, <davem@...emloft.net>, <edumazet@...gle.com>, <pabeni@...hat.com>, <parthiban.veerasooran@...rochip.com>, <gregkh@...uxfoundation.org>, <jirislaby@...nel.org>, <yury.norov@...il.com>, <akpm@...ux-foundation.org>, <jdelvare@...e.com>, <linux@...ck-us.net>, <alexandre.belloni@...tlin.com>, <pgaj@...ence.com>
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Subject: Re: [PATCH v4 03/13] media: pci: cx18-av-vbi: Replace open-coded parity calculation with parity_odd()

On April 10, 2025 12:06:52 AM Johannes Berg <johannes@...solutions.net> wrote:

> On Wed, 2025-04-09 at 20:43 +0200, Arend van Spriel wrote:
>>
>> This is orthogonal to the change to parity_odd() though. More specific
>> to the new parity_odd() you can now do following as parity_odd()
>> argument is u64:
>>
>> err = !parity_odd(*(u16 *)p);
>
> Can it though? Need to be careful with alignment with that, I'd think.

My bad. You are absolutely right.

Gr. AvS
>