linux-kernel - Re: [PATCH] ubifs: add CONFIG_BLOCK dependency for encryption

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Date:   Fri, 16 Dec 2016 10:26:35 +0100
From:   Richard Weinberger <richard@....at>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Artem Bityutskiy <dedekind1@...il.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Ext4 Developers List <linux-ext4@...r.kernel.org>,
        Theodore Ts'o <tytso@....edu>,
        Eric Biggers <ebiggers@...gle.com>,
        David Gstir <david@...ma-star.at>,
        Randy Dunlap <rdunlap@...radead.org>
Subject: Re: [PATCH] ubifs: add CONFIG_BLOCK dependency for encryption

Arnd,

On 16.12.2016 09:42, Arnd Bergmann wrote:
> This came up during the v4.10 merge window:
> 
> warning: (UBIFS_FS_ENCRYPTION) selects FS_ENCRYPTION which has unmet direct dependencies (BLOCK)
> fs/crypto/crypto.c: In function 'fscrypt_zeroout_range':
> fs/crypto/crypto.c:355:9: error: implicit declaration of function 'bio_alloc';did you mean 'd_alloc'? [-Werror=implicit-function-declaration]
>    bio = bio_alloc(GFP_NOWAIT, 1);
> 
> The easiest way out is to limit UBIFS_FS_ENCRYPTION to configurations
> that also enable BLOCK.

Thanks for the fix!
I'll queue this for -rc2.

In the long-run I'd like to remove the CONFIG_BLOCK dependency from fs/crypto/crypto.c
since UBIFS does not use the block related functions at all.

Thanks,
//richard