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([2001:8a0:e962:d100:1418:46b6:4675:1031]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c1fd4532e1esm81618366b.50.2026.07.31.02.43.34 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 31 Jul 2026 02:43:35 -0700 (PDT) Sender: Julian Braha Message-ID: Date: Fri, 31 Jul 2026 10:43:34 +0100 Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] Documentation: warn against using int, hex, string options as expressions in Kconfig To: Nathan Chancellor Cc: nsc@kernel.org, corbet@lwn.net, skhan@linuxfoundation.org, jani.nikula@linux.intel.com, arnd@arndb.de, stefan.hengelein@fau.de, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, nico@fluxnic.net, officialnaumansabir@gmail.com, rdunlap@infradead.org, vegard.nossum@oracle.com, kees@kernel.org, tj@kernel.org References: <20260730140108.683967-1-julianbraha@gmail.com> <178545753473.3004192.2499981065379649802.b4-review@b4> Content-Language: en-US From: Julian Braha In-Reply-To: <178545753473.3004192.2499981065379649802.b4-review@b4> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 7/31/26 01:25, Nathan Chancellor wrote: > Drop this quoting of y for clarity? Sure, I'll send a v2. >> This 'if FOO' will always be false, regardless of FOO's value (even when >> FOO=1). The same goes for strings and hex. > Hmmm, it might be kind of nice to either: > > 1. Warn about this in Kconfig directly (if possible) > 2. Support this usage in Kconfig how one would intuitively expect from > either C or Python where symbols with values of 0, 0x0, and '' would > be treated as false and every other value set as true. Agreed, an interpreter change for this is on my roadmap. Though I was also considering to make this error out. Would be good to get some more feedback from others on which approach is preferred (Jani, Arnd?) > That said, until either of those potentially happen, this patch seems > fine. Thanks for your review! - Julian Braha