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Date: Wed, 13 Aug 2014 16:16:32 +0800 From: Chen Gang <gang.chen.5i5j@...il.com> To: Geert Uytterhoeven <geert@...ux-m68k.org> CC: Arnd Bergmann <arnd@...db.de>, Andrew Morton <akpm@...ux-foundation.org>, Jean Delvare <jdelvare@...e.de>, Russell King <linux@....linux.org.uk>, Catalin Marinas <catalin.marinas@....com>, Will Deacon <will.deacon@....com>, Mark Salter <msalter@...hat.com>, "a-jacquiot@...com" <a-jacquiot@...com>, Tony Luck <tony.luck@...el.com>, Fenghua Yu <fenghua.yu@...el.com>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, "H. Peter Anvin" <hpa@...or.com>, the arch/x86 maintainers <x86@...nel.org>, "linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>, linux-c6x-dev@...ux-c6x.org, "linux-ia64@...r.kernel.org" <linux-ia64@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Linux-Arch <linux-arch@...r.kernel.org>, linux-kbuild <linux-kbuild@...r.kernel.org> Subject: Re: [PATCH v2] arch: Kconfig: Let all little endian architectures define CPU_LITTLE_ENDIAN explicitly On 8/13/14 16:03, Geert Uytterhoeven wrote: > CC kbuild > > On Wed, Aug 13, 2014 at 12:48 AM, Chen Gang <gang.chen.5i5j@...il.com> wrote: >> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig >> index c49a775..0510a5d 100644 >> --- a/arch/arm/Kconfig >> +++ b/arch/arm/Kconfig >> @@ -199,6 +199,11 @@ config NEED_DMA_MAP_STATE >> config ARCH_SUPPORTS_UPROBES >> def_bool y >> >> +config CPU_LITTLE_ENDIAN >> + depends on !CPU_BIG_ENDIAN >> + def_bool y >> + >> + >> config ARCH_HAS_DMA_SET_COHERENT_MASK >> bool > > As this is a common symbol, and replicated for all affected architectures, > I'm wondering if we should have the "config CPU_LITTLE_ENDIAN" in > common Kconfig code instead, and make the individual architectures do a > "select CPU_LITTLE_ENDIAN"? > That sounds a good idea to me. > Also we could have "config CPU_BIG_ENDIAN", too, and error out > if none or both are selected (can Kconfig error out?). > It is a good idea to me, welcome any members ideas, especially Kbuild members' ideas, suggestions or completions. Thanks. -- Chen Gang Open, share, and attitude like air, water, and life which God blessed -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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