2020-02-03 00:24:25

by Stephen Rothwell

[permalink] [raw]
Subject: linux-next: build failure after merge of the block tree

Hi all,

After merging the block tree, today's linux-next build (powerpc
ppc64_defconfig) failed like this:

In file included from drivers/vhost/vhost.c:13:
include/linux/eventfd.h:43:22: error: unknown type name 'eventfd_wake_count'
43 | DECLARE_PER_CPU(int, eventfd_wake_count);
| ^~~~~~~~~~~~~~~~~~
include/linux/eventfd.h: In function 'eventfd_signal_count':
include/linux/eventfd.h:47:9: error: implicit declaration of function 'this_cpu_read' [-Werror=implicit-function-declaration]
47 | return this_cpu_read(eventfd_wake_count);
| ^~~~~~~~~~~~~
include/linux/eventfd.h:47:23: error: 'eventfd_wake_count' undeclared (first use in this function); did you mean 'eventfd_signal_count'?
47 | return this_cpu_read(eventfd_wake_count);
| ^~~~~~~~~~~~~~~~~~
| eventfd_signal_count
include/linux/eventfd.h:47:23: note: each undeclared identifier is reported only once for each function it appears in

Caused by commit

9a9f718763cf ("eventfd: track eventfd_signal() recursion depth")

I have used the block tree from next-20200131 for today.

--
Cheers,
Stephen Rothwell

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2020-02-03 05:33:10

by Jens Axboe

[permalink] [raw]
Subject: Re: linux-next: build failure after merge of the block tree

On 2/2/20 5:04 PM, Stephen Rothwell wrote:
> Hi all,
>
> After merging the block tree, today's linux-next build (powerpc
> ppc64_defconfig) failed like this:
>
> In file included from drivers/vhost/vhost.c:13:
> include/linux/eventfd.h:43:22: error: unknown type name 'eventfd_wake_count'
> 43 | DECLARE_PER_CPU(int, eventfd_wake_count);
> | ^~~~~~~~~~~~~~~~~~
> include/linux/eventfd.h: In function 'eventfd_signal_count':
> include/linux/eventfd.h:47:9: error: implicit declaration of function 'this_cpu_read' [-Werror=implicit-function-declaration]
> 47 | return this_cpu_read(eventfd_wake_count);
> | ^~~~~~~~~~~~~
> include/linux/eventfd.h:47:23: error: 'eventfd_wake_count' undeclared (first use in this function); did you mean 'eventfd_signal_count'?
> 47 | return this_cpu_read(eventfd_wake_count);
> | ^~~~~~~~~~~~~~~~~~
> | eventfd_signal_count
> include/linux/eventfd.h:47:23: note: each undeclared identifier is reported only once for each function it appears in
>
> Caused by commit
>
> 9a9f718763cf ("eventfd: track eventfd_signal() recursion depth")
>
> I have used the block tree from next-20200131 for today.

Doh, missed include, didn't fail on x86-64. Fixed it up, should work
tomorrow.

--
Jens Axboe