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Message-ID: <53EA99C3.90203@gmail.com> Date: Wed, 13 Aug 2014 06:48:35 +0800 From: Chen Gang <gang.chen.5i5j@...il.com> To: Arnd Bergmann <arnd@...db.de> CC: akpm@...ux-foundation.org, Geert Uytterhoeven <geert@...ux-m68k.org>, Jean Delvare <jdelvare@...e.de>, linux@....linux.org.uk, catalin.marinas@....com, will.deacon@....com, msalter@...hat.com, a-jacquiot@...com, tony.luck@...el.com, fenghua.yu@...el.com, tglx@...utronix.de, mingo@...hat.com, hpa@...or.com, x86@...nel.org, linux-arm-kernel@...ts.infradead.org, linux-c6x-dev@...ux-c6x.org, linux-ia64@...r.kernel.org, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, linux-arch@...r.kernel.org Subject: [PATCH v2] arch: Kconfig: Let all little endian architectures define CPU_LITTLE_ENDIAN explicitly x86 and ia64 are always little endian. And another architectures may be little endian: mips, sh, powerpc, and m32r (may mark CPU_LITTLE_ENDIAN explicitly); also arm(64) and c6x (which may be !CPU_BIG_ENDIAN). Some drivers (e.g. some of "drivers/isdn/hisax") may only support little endian (CPU_LITTLE_ENDIAN), and some drivers may only support big endian (!CPU_LITTLE_ENDIAN). So export all little endian architectures within kernel wide, so can let Kconfig easier for the modules which only support little endian or only for big endian (assume !CPU_LITTLE_ENDIAN is same as CPU_BIG_ENDIAN). Signed-off-by: Chen Gang <gang.chen.5i5j@...il.com> --- arch/arm/Kconfig | 5 +++++ arch/arm64/Kconfig | 4 ++++ arch/c6x/Kconfig | 4 ++++ arch/ia64/Kconfig | 3 +++ arch/x86/Kconfig | 3 +++ 5 files changed, 19 insertions(+) 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 diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 62b4ae1..290a253 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -129,6 +129,10 @@ config KERNEL_MODE_NEON config FIX_EARLYCON_MEM def_bool y +config CPU_LITTLE_ENDIAN + depends on !CPU_BIG_ENDIAN + def_bool y + source "init/Kconfig" source "kernel/Kconfig.freezer" diff --git a/arch/c6x/Kconfig b/arch/c6x/Kconfig index 77ea09b..56a8f53 100644 --- a/arch/c6x/Kconfig +++ b/arch/c6x/Kconfig @@ -48,6 +48,10 @@ config C6X_BIG_KERNEL If unsure, say N. +config CPU_LITTLE_ENDIAN + depends on !CPU_BIG_ENDIAN + def_bool y + source "init/Kconfig" # Use the generic interrupt handling code in kernel/irq/ diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig index 64aefb7..fa12d34 100644 --- a/arch/ia64/Kconfig +++ b/arch/ia64/Kconfig @@ -133,6 +133,9 @@ config AUDIT_ARCH bool default y +config CPU_LITTLE_ENDIAN + def_bool y + menuconfig PARAVIRT_GUEST bool "Paravirtualized guest support" depends on BROKEN diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 541e7cc..a1b3568 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -270,6 +270,9 @@ config ARCH_SUPPORTS_UPROBES config FIX_EARLYCON_MEM def_bool y +config CPU_LITTLE_ENDIAN + def_bool y + source "init/Kconfig" source "kernel/Kconfig.freezer" -- 1.7.11.7 -- 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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