From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 75B4511185 for ; Mon, 20 Nov 2023 09:20:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="V6QdbRkG" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0FCD6C433C7; Mon, 20 Nov 2023 09:20:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1700472019; bh=4NLwyU1v19boSsR+mku5TJJXOQ/JljZyEMSPYER1zXo=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=V6QdbRkGTyKtj+UvG6eHAn53TbET4+RHfUDJf4wbOVdkt+HF6MaNrDQGxJPZ/vSgU PqufWwnksnwVoK6I16CWyOW6bucY4H3mbgZJbDk8Yq9HVMSHBJQnknHk7QtLMrqF4R oymtnyMvwaQAiRWTwnrdwZv1UpGt11V8yqH6ZlVSROi0o1hLs8dJ/kgs1VicSg/EQm Ttg+Z8QrZ6sz4dDpyT7tigXcTgbV+d84D/7vig80XlUJswX6Wd6WAYxO+ssaNWpGfl aLqOVAmmm4Y3obQRa+gGNrRK+bwyx5OtBr/y81Bz+RbY1tgH7pfEdHytiT7sKJVzvJ XalIr2PUY+qxg== Message-ID: <9460eced-5a3b-41c0-b821-e327f6bd06c9@kernel.org> Date: Mon, 20 Nov 2023 10:20:13 +0100 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [net-next 2/2] net: dsa: realtek: load switch variants on demand Content-Language: en-US To: Luiz Angelo Daros de Luca , netdev@vger.kernel.org Cc: linus.walleij@linaro.org, alsi@bang-olufsen.dk, andrew@lunn.ch, f.fainelli@gmail.com, olteanv@gmail.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, arinc.unal@arinc9.com References: <20231117235140.1178-1-luizluca@gmail.com> <20231117235140.1178-3-luizluca@gmail.com> From: Krzysztof Kozlowski Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 18/11/2023 00:50, Luiz Angelo Daros de Luca wrote: > realtek-common had a hard dependency on both switch variants. As a > result, it was not possible to selectively load only one model at > runtime. Now, variants are registered in the realtek-common module, and > interface modules look for a variant using the compatible string. ... > diff --git a/drivers/net/dsa/realtek/realtek-common.h b/drivers/net/dsa/realtek/realtek-common.h > index 90a949386518..6de4991d8b5c 100644 > --- a/drivers/net/dsa/realtek/realtek-common.h > +++ b/drivers/net/dsa/realtek/realtek-common.h > @@ -5,6 +5,37 @@ > > #include > > +struct realtek_variant_entry { > + const struct realtek_variant *variant; > + const char *compatible; > + struct module *owner; > + struct list_head list; > +}; > + > +#define module_realtek_variant(__variant, __compatible) \ > +static struct realtek_variant_entry __variant ## _entry = { \ > + .compatible = __compatible, \ > + .variant = &(__variant), \ > + .owner = THIS_MODULE, \ > +}; \ > +static int __init realtek_variant_module_init(void) \ > +{ \ > + realtek_variant_register(&__variant ## _entry); \ > + return 0; \ > +} \ > +module_init(realtek_variant_module_init) \ > + \ > +static void __exit realtek_variant_module_exit(void) \ > +{ \ > + realtek_variant_unregister(&__variant ## _entry); \ > +} \ > +module_exit(realtek_variant_module_exit); \ > + \ > +MODULE_ALIAS(__compatible) No, why do you need it? You should not need MODULE_ALIAS() in normal cases. If you need it, usually it means your device ID table is wrong (e.g. misses either entries or MODULE_DEVICE_TABLE()). MODULE_ALIAS() is not a substitute for incomplete ID table. Entire abstraction/macro is pointless and make the code less readable. Best regards, Krzysztof