linux-kernel - RE: [PATCH] staging: rtl8188eu: Replace a custom function with crc32

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Message-ID: <2fac9d8813374e95bcc04134a0f40f45@AcuMS.aculab.com>
Date:   Thu, 1 Jul 2021 14:52:08 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     "'Fabio M. De Francesco'" <fmdefrancesco@...il.com>,
        Larry Finger <Larry.Finger@...inger.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "linux-staging@...ts.linux.dev" <linux-staging@...ts.linux.dev>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] staging: rtl8188eu: Replace a custom function with
 crc32_le()

From: Fabio M. De Francesco
> Sent: 01 July 2021 14:38
> 
> Use crc32_le in place of the custom getcrc32. This change makes GCC
> to warn about incorrect castings to the restricted type __le32, but
> they can be safely ignored because crc32_le calculates bitwise
> little-endian Ethernet AUTODIN II CRC32.
> 
...
> -					*((__le32 *)crc) = getcrc32(payload, length);/* modified by Amy*/
> +					*((__le32 *)crc) = ~crc32_le(~0, payload, length);

Haven't we been round this before?
You need to get rid of these crappy casts.

	David

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