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Date:   Mon, 15 Feb 2021 14:34:07 +0000
From:   Al Viro <viro@zeniv.linux.org.uk>
To:     Naresh Kamboju <naresh.kamboju@linaro.org>
Cc:     Arnd Bergmann <arnd@kernel.org>,
        open list <linux-kernel@vger.kernel.org>,
        Linux-Next Mailing List <linux-next@vger.kernel.org>,
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Subject: Re: LTP: madvise08.c:203: TFAIL: No sequence in dump after
 MADV_DODUMP.
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On Mon, Feb 15, 2021 at 02:11:15PM +0530, Naresh Kamboju wrote:

> fs/coredump.c:903:9: error: 'return' with a value, in function
> returning void [-Werror=return-type]
>  903 | return 0;
>         | ^
> 
> Build failed due to above error.

FWIW, here the test results in
Running tests.......
<<<test_start>>>
tag=madvise08 stime=1613398818
cmdline="madvise08"
contacts=""
analysis=exit
<<<test_output>>>
incrementing stop
tst_test.c:1250: TINFO: Timeout per run is 0h 05m 00s
madvise08.c:78: TINFO: Temporary core pattern is '/tmp/ltp-tgvQ3Lz1UZ/B6lwy6/dump-%p'                              
madvise08.c:117: TINFO: Dump file should be dump-2276
madvise08.c:201: TPASS: madvise(..., MADV_DONTDUMP)
madvise08.c:117: TINFO: Dump file should be dump-2277
madvise08.c:205: TPASS: madvise(..., MADV_DODUMP)

Summary:
passed   2
failed   0
skipped  0
warnings 0
<<<execution_status>>>
initiation_status="ok"
duration=0 termination_type=exited termination_id=0 corefile=no
cutime=0 cstime=0
<<<test_end>>>

(built without -Werror=return-type, so I'd missed the warnings)

Anyway, I've folded the fix (with those stray return 0 removed, of course)
into #work.coredump and #for-next; works here.  Could you test either
branch (in git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git)?