From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chen Gang Date: Tue, 12 Aug 2014 03:27:42 +0000 Subject: Re: [PATCH] arch: Kconfig: Let all little endian architectures define CPU_LITTLE_ENDIAN explicitly Message-Id: <53E989AE.7070808@gmail.com> List-Id: References: <53E93334.5000205@gmail.com> <20140811225326.GF30401@n2100.arm.linux.org.uk> In-Reply-To: <20140811225326.GF30401@n2100.arm.linux.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Russell King - ARM Linux Cc: Arnd Bergmann , akpm@linux-foundation.org, Geert Uytterhoeven , Jean Delvare , catalin.marinas@arm.com, will.deacon@arm.com, tony.luck@intel.com, fenghua.yu@intel.com, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, x86@kernel.org, linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org, "linux-kernel@vger.kernel.org" , gxt@mprc.pku.edu.cn, liqin.linux@gmail.com, lennox.wu@gmail.com, cmetcalf@tilera.com, hskinnemoen@gmail.com, egtvedt@samfundet.no, james.hogan@imgtec.com, linux-arch@vger.kernel.org On 8/12/14 6:53, Russell King - ARM Linux wrote: > On Tue, Aug 12, 2014 at 05:18:44AM +0800, Chen Gang wrote: >> x86, ia64, and arm(64) are little endian, and also another architectures >> may be little endian (mips, sh, powerpc, and m32r) which already marked >> CPU_LITTLE_ENDIAN explicitly. > > This is incorrect. ARM can be either endian. > > arch/arm/mm/Kconfig: > > config CPU_BIG_ENDIAN > bool "Build big-endian kernel" > depends on ARCH_SUPPORTS_BIG_ENDIAN > help > Say Y if you plan on running a kernel in big-endian mode. > Note that your board must be properly built and your board > port must properly enable any big-endian related features > of your chipset/board/processor. > OK, thanks, I shall check all CPU_BIG_ENDIAN and send patch v2 for it. And still welcome another ideas, suggestions or completions, especially for another architectures. Thanks. -- Chen Gang Open, share, and attitude like air, water, and life which God blessed