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Date:   Thu, 7 May 2020 03:35:57 +0100
From:   Al Viro <viro@...iv.linux.org.uk>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Jens Axboe <axboe@...nel.dk>
Subject: Re: linux-next: build failure after merge of the vfs tree

On Thu, May 07, 2020 at 10:39:21AM +1000, Stephen Rothwell wrote:
> Hi all,
> 
> After merging the vfs tree, today's linux-next build (arm
> multi_v7_defconfig) failed like this:
> 
> fs/eventfd.c: In function 'eventfd_read':
> fs/eventfd.c:226:6: error: implicit declaration of function 'iov_iter_count' [-Werror=implicit-function-declaration]
>   226 |  if (iov_iter_count(to) < sizeof(ucnt))
>       |      ^~~~~~~~~~~~~~
> In file included from include/linux/file.h:9,
>                  from fs/eventfd.c:9:
> fs/eventfd.c:257:15: error: implicit declaration of function 'copy_to_iter'; did you mean 'copy_to_user'? [-Werror=implicit-function-declaration]
>   257 |  if (unlikely(copy_to_iter(&ucnt, sizeof(ucnt), to) != sizeof(ucnt)))
>       |               ^~~~~~~~~~~~
> 
> Caused by commit
> 
>   a6515b3a7410 ("eventfd: convert to f_op->read_iter()")
> 
> I have applied the following patch for today:

[snip]

folded and pushed out

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