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[82.69.66.36]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3b79c4532c4sm16187700f8f.36.2025.08.04.11.04.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 04 Aug 2025 11:04:35 -0700 (PDT) Date: Mon, 4 Aug 2025 19:04:34 +0100 From: David Laight To: "Arnd Bergmann" Cc: "Thomas Huth" , "John Paul Adrian Glaubitz" , linux-kernel@vger.kernel.org, Linux-Arch , "David S . Miller" , "Andreas Larsson" , sparclinux@vger.kernel.org Subject: Re: [PATCH 34/41] sparc: Replace __ASSEMBLY__ with __ASSEMBLER__ in non-uapi headers Message-ID: <20250804190434.1b9f7535@pumpkin> In-Reply-To: <579ca73e-3b55-4e05-88ae-d7bc192f0023@app.fastmail.com> References: <20250314071013.1575167-1-thuth@redhat.com> <20250314071013.1575167-35-thuth@redhat.com> <5d9ab8b51a3281f249f514598c949d2c9ca6d194.camel@physik.fu-berlin.de> <810a8ec4-e416-42b6-97bf-8a56f41deea1@redhat.com> <579ca73e-3b55-4e05-88ae-d7bc192f0023@app.fastmail.com> X-Mailer: Claws Mail 4.1.1 (GTK 3.24.38; arm-unknown-linux-gnueabihf) Precedence: bulk X-Mailing-List: linux-arch@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Mon, 04 Aug 2025 10:00:27 +0200 "Arnd Bergmann" wrote: > On Mon, Aug 4, 2025, at 08:01, Thomas Huth wrote: > > On 03/08/2025 15.33, John Paul Adrian Glaubitz wrote: > > > > > So using -ansi in the kernel sources nowadays sounds wrong to me ... could > > it be removed? > > Probably: I see that sparc changed '-traditional' cpp flag to the '-ansi' > gcc flag in linux-2.1.88, while the others were still using > -traditional but just dropped it later. > > Most likely the idea at the time was to just no longer use pre-ansi > preprocessing rather than to exclude gnu extensions. You also get a change to the integer promotion rules. K&R C is signedness preserving (so unsigned char -> unsigned int) whereas ANSI C is value preserving (so unsigned char -> signed int). Unless, of course 'char' and 'int' are the same size. David > > Arnd >