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Message-Id: <5d23903c-7d95-4f3f-975a-7f2fbd70e12e@app.fastmail.com>
Date: Mon, 17 Mar 2025 10:04:48 +0100
From: "Arnd Bergmann" <arnd@...db.de>
To: "Herbert Xu" <herbert@...dor.apana.org.au>,
"David Howells" <dhowells@...hat.com>
Cc: "Arnd Bergmann" <arnd@...nel.org>,
"'bbrezillon@...nel.org'" <bbrezillon@...nel.org>,
"Arnaud Ebalard" <arno@...isbad.org>, "Srujana Challa" <schalla@...vell.com>,
"David S . Miller" <davem@...emloft.net>,
"Jarkko Sakkinen" <jarkko@...nel.org>, "Paul Moore" <paul@...l-moore.com>,
"James Morris" <jmorris@...ei.org>, "Serge E. Hallyn" <serge@...lyn.com>,
"Justin M. Forbes" <jforbes@...oraproject.org>,
"Jason A . Donenfeld" <Jason@...c4.com>, "Rosen Penev" <rosenp@...il.com>,
"Ard Biesheuvel" <ardb@...nel.org>,
"James E . J . Bottomley" <James.Bottomley@...senpartnership.com>,
linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
keyrings@...r.kernel.org, linux-security-module@...r.kernel.org
Subject: Re: [PATCH] [v2] crypto: lib/Kconfig: hide library options
On Mon, Mar 17, 2025, at 09:37, Herbert Xu wrote:
> On Mon, Mar 17, 2025 at 08:36:25AM +0000, David Howells wrote:
>> Arnd Bergmann <arnd@...nel.org> wrote:
>>
>> > - depends on CRYPTO_LIB_CHACHA20POLY1305 = y
>> > + select CRYPTO_LIB_CHACHA20POLY1305
>>
>> Doesn't that allow CRYPTO_LIB_CHACHA20POLY1305=m?
>
> Not unless BIG_KEYS is tristate or under a tristate.
Right, or if it selects something that has a dependency.
Before commit 17ec3e71ba79 ("crypto: lib/Kconfig - Hide arch
options from user"), CRYPTO_LIB_CHACHA20POLY1305 had a
dependency on CONFIG_CRYPTO, so with CRYPTO=m, the 'select CRYPTO_LIB_CHACHA20POLY1305' in BIG_KEYS would result in
CRYPTO_LIB_CHACHA20POLY1305=m.
Arnd
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