linux-kernel - Re: [PATCH 1/2] selftests/mm: Add -Wunreachable-code and fix warnings

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Message-ID: <175479c6-d43f-48b1-8fb5-c78a555cd315@redhat.com>
Date: Fri, 12 Sep 2025 14:35:40 +0200
From: David Hildenbrand <david@...hat.com>
To: Muhammad Usama Anjum <usama.anjum@...labora.com>,
 Andrew Morton <akpm@...ux-foundation.org>,
 Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
 "Liam R. Howlett" <Liam.Howlett@...cle.com>, Vlastimil Babka
 <vbabka@...e.cz>, Mike Rapoport <rppt@...nel.org>,
 Suren Baghdasaryan <surenb@...gle.com>, Michal Hocko <mhocko@...e.com>,
 Shuah Khan <shuah@...nel.org>, Jason Gunthorpe <jgg@...pe.ca>,
 Leon Romanovsky <leon@...nel.org>, Zi Yan <ziy@...dia.com>,
 Baolin Wang <baolin.wang@...ux.alibaba.com>, Nico Pache <npache@...hat.com>,
 Ryan Roberts <ryan.roberts@....com>, Dev Jain <dev.jain@....com>,
 Barry Song <baohua@...nel.org>, Lance Yang <lance.yang@...ux.dev>,
 linux-mm@...ck.org, linux-kselftest@...r.kernel.org,
 linux-kernel@...r.kernel.org
Cc: kernel@...labora.com, Sidhartha Kumar <sidhartha.kumar@...cle.com>,
 Kevin Brodsky <kevin.brodsky@....com>
Subject: Re: [PATCH 1/2] selftests/mm: Add -Wunreachable-code and fix warnings

On 12.09.25 14:30, Muhammad Usama Anjum wrote:
> Enable -Wunreachable-code flag to catch dead code and fix them.
> 
> 1. Remove the dead code and write a comment instead:
> hmm-tests.c:2033:3: warning: code will never be executed
> [-Wunreachable-code]
>                  perror("Should not reach this\n");
>                  ^~~~~~
> 
> 2. ksft_exit_fail_msg() calls exit(). So cleanup isn't done. Replace it
>     with ksft_print_msg().
> split_huge_page_test.c:301:3: warning: code will never be executed
> [-Wunreachable-code]
>                  goto cleanup;
>                  ^~~~~~~~~~~~
> 
> 3. Remove duplicate inline.
> pkey_sighandler_tests.c:44:15: warning: duplicate 'inline' declaration
> specifier [-Wduplicate-decl-specifier]
> static inline __always_inline
> 
> Reviewed-by: Sidhartha Kumar <sidhartha.kumar@...cle.com>
> Reviewed-by: Kevin Brodsky <kevin.brodsky@....com>
> Signed-off-by: Muhammad Usama Anjum <usama.anjum@...labora.com>
> ---

Acked-by: David Hildenbrand <david@...hat.com>

-- 
Cheers

David / dhildenb