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b=I9nCQsQrodPBIAuw9DKd4DDPXJ5vehsGPkAbnRMf5Ny4yrlHb4MGfiGRAZZ42sOnp AafWGSqmioUIOpB7XLP3tIhQisxsvdt6QH2i1yLWc9x64tp+ISvc1ZNclTCG2vAErT SEeFM2Orn0WNnkLCkA5CdWqFKZKfxBERk6vTk5FtLEcQLZ0kGjxOF+Dz1COo8wxvui HUsVbEOkMzixhxUk0GqAhEHb4yYm75QAypSb4f9KOcQLM8azd6UvcYuDoqP5nDsX3B JnH2tsJobsv7pLHvZFzN1Dq6dzO3LwWa61AtPwK9htqbWogQEcNitdKxeK6SJbp667 h2WtW+sXUGd1g== Message-ID: <67722705-d45b-4474-90dc-e2402d766688@kernel.org> Date: Mon, 28 Sep 2026 11:25:37 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 1/3] selftests: kselftest: avoid cd - in runner To: Hajime Tazaki , linux-mm@kvack.org, liam@infradead.org, rbm@suse.com, akpm@linux-foundation.org, luto@amacapital.net, brendan.jackman@linux.dev, liuhangbin@gmail.com, corbet@lwn.net, kees@kernel.org, ljs@kernel.org, broonie@kernel.org, mhocko@suse.com, rppt@kernel.org, shuah@kernel.org, surenb@google.com, vbabka@kernel.org, wad@chromium.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-um@lists.infradead.org Cc: geert@linux-m68k.org, daniel@thingy.jp References: <20260926010819.604346-1-thehajime@gmail.com> <20260926010819.604346-2-thehajime@gmail.com> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspam-User: X-Stat-Signature: 5euc4zdmejpzd5sy99kmiyfgqn7idfek X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 81896C0004 X-HE-Tag: 1790587547-151766 X-HE-Meta: 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 U5rS6NHe 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 9/26/26 03:08, Hajime Tazaki wrote: > The kselftest runner currently uses `cd -` to restore its working > directory after running a test. > > This is not supported by the minimal BusyBox hush shell used by some > NOMMU targets. Store the original directory explicitly and restore it > with a quoted path instead. > > This also avoids printing the directory change performed by `cd -` and > handles paths containing whitespace correctly. > > Cc: Shuah Khan > Cc: Kees Cook > Cc: Andy Lutomirski > Cc: Will Drewry > Cc: Mark Brown > Cc: Brendan Jackman > Cc: Hangbin Liu > Cc: "Ricardo B. Marliere" > Cc: linux-kselftest@vger.kernel.org > Cc: linux-um@lists.infradead.org > Cc: linux-mm@kvack.org > Signed-off-by: Hajime Tazaki > --- Reviewed-by: David Hildenbrand (Arm) -- Cheers, David