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Re: linux-next: build warning after merge of the akpm-current tree

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On Fri, 2017-05-26 at 12:43 +1000, Stephen Rothwell wrote:
> Hi Andrew,
> 
> After merging the akpm-current tree, today's linux-next build (powerpc
> ppc64_defconfig) produced this warning:
> 
> fs/jfs/jfs_metapage.c: In function 'force_metapage':
> fs/jfs/jfs_metapage.c:714:2: warning: ignoring return value of 'write_one_page', declared with attribute warn_unused_result [-Wunused-result]
>   write_one_page(page);
>   ^
> fs/jfs/jfs_metapage.c: In function 'release_metapage':
> fs/jfs/jfs_metapage.c:759:4: warning: ignoring return value of 'write_one_page', declared with attribute warn_unused_result [-Wunused-result]
>     write_one_page(page);
>     ^
> 
> Introduced by commit
> 
>   f8652aebee02 ("mm: drop "wait" parameter from write_one_page()")
> 
> These call sites were updated for the droppping of the argument, but
> not for the addition of __must_check :-(
> 

(cc'ing Dave...)

Yeah, that's a known issue. When Willy reviewed the patch originally he
asked me to add a __must_check there so that JFS would pick up some
warnings for this.

JFS really ought to check the return code there and do something sane
with it. Dave?

-- 
Jeff Layton <jlayton@redhat.com>

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linux-next: build warning after merge of the akpm-current tree Stephen Rothwell <sfr@canb.auug.org.au> - 2017-05-26 04:50 +0200
  Re: linux-next: build warning after merge of the akpm-current tree Jeff Layton <jlayton@redhat.com> - 2017-05-26 12:20 +0200
    Re: linux-next: build warning after merge of the akpm-current tree Dave Kleikamp <dave.kleikamp@oracle.com> - 2017-05-26 13:30 +0200
    Re: [PATCH] JFS: do not ignore return code from write_one_page() Dave Kleikamp <dave.kleikamp@oracle.com> - 2017-05-27 03:30 +0200
      Re: [PATCH] JFS: do not ignore return code from write_one_page() Andrew Morton <akpm@linux-foundation.org> - 2017-05-27 08:40 +0200
        Re: [PATCH] JFS: do not ignore return code from write_one_page() Stephen Rothwell <sfr@canb.auug.org.au> - 2017-05-29 01:30 +0200
    [PATCH] JFS: do not ignore return code from write_one_page() Dave Kleikamp <dave.kleikamp@oracle.com> - 2017-05-27 03:40 +0200

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