Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755208AbbK0Sjm (ORCPT ); Fri, 27 Nov 2015 13:39:42 -0500 Received: from mail-ob0-f182.google.com ([209.85.214.182]:35832 "EHLO mail-ob0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754961AbbK0Sjj (ORCPT ); Fri, 27 Nov 2015 13:39:39 -0500 Subject: Re: [PATCH 1/1] kconfig: add CPU endian selection beconfig and leconfig To: Scott Branden , "Yann E. MORIN" References: <1448567995-8784-1-git-send-email-sbranden@broadcom.com> <1448567995-8784-2-git-send-email-sbranden@broadcom.com> Cc: bcm-kernel-feedback-list@broadcom.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org From: Florian Fainelli Message-ID: <5658A368.7080509@gmail.com> Date: Fri, 27 Nov 2015 10:39:36 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: <1448567995-8784-2-git-send-email-sbranden@broadcom.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2767 Lines: 80 Le 26/11/2015 11:59, Scott Branden a écrit : > Add support for switching defconfig between big and little endian CPU. > Various CPU types have ability to select big and little endian > CPU in the kernel configuration. > > "make beconfig" will set CONFIG_CPU_BIG_ENDIAN > "make leconfig" will unset CONFIG_CPU_BIG_ENDIAN I believe I understand what you are trying to achieve here, which is to have an identical defconfig file that you can share between a big-endian and little-endian kernel? Is not this something better left to a build system which understands what config fragments are in general? Since we seem to have support for fragments now with kvm and friends, having this does not seem to be a big stretch though. > > Signed-off-by: Scott Branden > --- > kernel/configs/be.config | 1 + > kernel/configs/le.config | 1 + > scripts/kconfig/Makefile | 10 ++++++++++ > 3 files changed, 12 insertions(+) > create mode 100644 kernel/configs/be.config > create mode 100644 kernel/configs/le.config > > diff --git a/kernel/configs/be.config b/kernel/configs/be.config > new file mode 100644 > index 0000000..c5cdc99 > --- /dev/null > +++ b/kernel/configs/be.config > @@ -0,0 +1 @@ > +CONFIG_CPU_BIG_ENDIAN=y > diff --git a/kernel/configs/le.config b/kernel/configs/le.config > new file mode 100644 > index 0000000..be479cf > --- /dev/null > +++ b/kernel/configs/le.config > @@ -0,0 +1 @@ > +# CONFIG_CPU_BIG_ENDIAN is not set > diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile > index d79cba4..2e8007e 100644 > --- a/scripts/kconfig/Makefile > +++ b/scripts/kconfig/Makefile > @@ -126,6 +126,14 @@ PHONY += tinyconfig > tinyconfig: > $(Q)$(MAKE) -f $(srctree)/Makefile allnoconfig tiny.config > > +PHONY += beconfig > +beconfig: be.config > + @: > + > +PHONY += leconfig > +leconfig: le.config > + @: > + > # Help text used by make help > help: > @echo ' config - Update current config utilising a line-oriented program' > @@ -151,6 +159,8 @@ help: > @echo ' kvmconfig - Enable additional options for kvm guest kernel support' > @echo ' xenconfig - Enable additional options for xen dom0 and guest kernel support' > @echo ' tinyconfig - Configure the tiniest possible kernel' > + @echo ' beconfig - Update current config to use big endian CPU' > + @echo ' leconfig - Update current config to use little endian CPU' > > # lxdialog stuff > check-lxdialog := $(srctree)/$(src)/lxdialog/check-lxdialog.sh > -- Florian -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/