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[82.69.66.36]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48fe4dac000sm196019465e9.0.2026.05.17.06.54.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 17 May 2026 06:54:24 -0700 (PDT) Date: Sun, 17 May 2026 14:54:21 +0100 From: David Laight To: Mingcong Bai Cc: linux-kernel@vger.kernel.org, Xi Ruoyao , Kexy Biscuit , stable@vger.kernel.org, kernel test robot , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , "Christophe Leroy (CS GROUP)" , linuxppc-dev@lists.ozlabs.org Subject: Re: [PATCH] powerpc: define __LITTLE_ENDIAN and __BIG_ENDIAN for math-emu Message-ID: <20260517145421.2d1ac77c@pumpkin> In-Reply-To: <20260517041423.71243-1-jeffbai@aosc.io> References: <20260517041423.71243-1-jeffbai@aosc.io> X-Mailer: Claws Mail 4.1.1 (GTK 3.24.38; arm-unknown-linux-gnueabihf) X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On Sun, 17 May 2026 12:14:21 +0800 Mingcong Bai wrote: > Similar to commit b929926f01f2 ("sh: define __BIG_ENDIAN for math-emu"), > define __LITTLE_ENDIAN and __BIG_ENDIAN as 0 to mitigate build-time > warnings: >=20 > ./include/math-emu/double.h:59:21: error: =E2=80=98__BIG_ENDIAN=E2=80= =99 is not defined, evaluates to =E2=80=980=E2=80=99 [-Werror=3Dundef] > 59 | #if __BYTE_ORDER =3D=3D __BIG_ENDIAN > | >=20 > Cc: stable@vger.kernel.org > Fixes: 13da9e200fe4 ("Revert "endian: #define __BYTE_ORDER"") > Reported-by: kernel test robot > Closes: https://lore.kernel.org/oe-kbuild-all/202507301656.7FEX6J5W-lkp@i= ntel.com/ > Signed-off-by: Mingcong Bai > --- > arch/powerpc/include/asm/sfp-machine.h | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) >=20 > diff --git a/arch/powerpc/include/asm/sfp-machine.h b/arch/powerpc/includ= e/asm/sfp-machine.h > index 8b957aabb826d..db8525605c026 100644 > --- a/arch/powerpc/include/asm/sfp-machine.h > +++ b/arch/powerpc/include/asm/sfp-machine.h > @@ -319,10 +319,12 @@ > #define abort() \ > return 0 > =20 > -#ifdef __BIG_ENDIAN > +#ifdef __BIG_ENDIAN__ > #define __BYTE_ORDER __BIG_ENDIAN > +#define __LITTLE_ENDIAN 0 > #else > #define __BYTE_ORDER __LITTLE_ENDIAN > +#define __BIG_ENDIAN 0 > #endif I thought the expected/correct value for __BYTE_ORDER__ was either 1234 or = 4321. (apart from pdp11's 2143). -- David > =20 > /* Exception flags. */