linux-kernel - Re: PROBLEM: 5.9.0-rc6 fails to compile due to 'redefinition of ‘dax

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Date:   Mon, 21 Sep 2020 11:34:17 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     Stuart Little <achirvasub@...il.com>
Cc:     Dan Williams <dan.j.williams@...el.com>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Dave Jiang <dave.jiang@...el.com>, linux-nvdimm@...ts.01.org,
        kernel list <linux-kernel@...r.kernel.org>,
        linux- stable <stable@...r.kernel.org>,
        Adrian Huang <ahuang12@...ovo.com>,
        Mike Snitzer <snitzer@...hat.com>, dm-devel@...hat.com,
        Ira Weiny <ira.weiny@...el.com>, mpatocka@...hat.com,
        lkft-triage@...ts.linaro.org, Jan Kara <jack@...e.cz>
Subject: Re: PROBLEM: 5.9.0-rc6 fails to compile due to 'redefinition of ‘dax_supported’'

On Mon, 21 Sep 2020 at 06:34, Stuart Little <achirvasub@...il.com> wrote:
>
> I am trying to compile for an x86_64 machine (Intel(R) Core(TM) i7-7500U CPU @ 2.70GHz). The config file I am currently using is at
>
> https://termbin.com/xin7
>
> The build for 5.9.0-rc6 fails with the following errors:
>

arm and mips allmodconfig build breaks due to this error.

>
> drivers/dax/super.c:325:6: error: redefinition of ‘dax_supported’
>   325 | bool dax_supported(struct dax_device *dax_dev, struct block_device *bdev,
>       |      ^~~~~~~~~~~~~
> In file included from drivers/dax/super.c:16:
> ./include/linux/dax.h:162:20: note: previous definition of ‘dax_supported’ was here
>   162 | static inline bool dax_supported(struct dax_device *dax_dev,
>       |                    ^~~~~~~~~~~~~
>   CC      lib/memregion.o
>   CC [M]  drivers/gpu/drm/drm_gem_vram_helper.o
> make[2]: *** [scripts/Makefile.build:283: drivers/dax/super.o] Error 1
> make[1]: *** [scripts/Makefile.build:500: drivers/dax] Error 2
> make[1]: *** Waiting for unfinished jobs....
>
> --- end ---
>
> That's earlier on, and then later, at the end of the (failed) build:
>
> make: *** [Makefile:1784: drivers] Error 2
>
> The full build log is at
>
> https://termbin.com/ihxj
>
> but I do not see anything else amiss. 5.9.0-rc5 built fine last week.

Reported-by: Naresh Kamboju <naresh.kamboju@...aro.org>