linux-kernel - Re: [PATCH 2/2] selftests/mm: protection

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Message-ID: <8BE96B0B-01DB-4629-A671-044E74680F1E@nvidia.com>
Date: Mon, 15 Sep 2025 11:43:03 -0400
From: Zi Yan <ziy@...dia.com>
To: Muhammad Usama Anjum <usama.anjum@...labora.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
 David Hildenbrand <david@...hat.com>,
 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>,
 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, kernel@...labora.com,
 Sidhartha Kumar <sidhartha.kumar@...cle.com>
Subject: Re: [PATCH 2/2] selftests/mm: protection_keys: Fix dead code

On 12 Sep 2025, at 8:30, Muhammad Usama Anjum wrote:

> The while loop doesn't execute and following warning gets generated:
>
> protection_keys.c:561:15: warning: code will never be executed
> [-Wunreachable-code]
>                 int rpkey = alloc_random_pkey();
>
> Let's enable the while loop such that it gets executed nr_iterations
> times. Simplify the code a bit as well.
>
> Reviewed-by: Sidhartha Kumar <sidhartha.kumar@...cle.com>
> Signed-off-by: Muhammad Usama Anjum <usama.anjum@...labora.com>
> ---
>  tools/testing/selftests/mm/protection_keys.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
>

LGTM. Reviewed-by: Zi Yan <ziy@...dia.com>

Best Regards,
Yan, Zi