From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751580Ab3KRJw3 (ORCPT ); Mon, 18 Nov 2013 04:52:29 -0500 Received: from mail.abilis.ch ([195.70.19.74]:22433 "EHLO mail.abilis.ch" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750836Ab3KRJwZ (ORCPT ); Mon, 18 Nov 2013 04:52:25 -0500 From: Christian Ruppert To: Vineet Gupta , "H. Peter Anvin" , Andrew Morton Cc: Linus Torvalds , Linux Kernel Mailing List , Pavel Roskin , Ingo Molnar , Thomas Gleixner , Sam Ravnborg , Noam Camus , Joe Perches , Christian Ruppert Subject: [PATCH 1/2] init/Kconfig: add option to disable kernel compression Date: Mon, 18 Nov 2013 10:51:50 +0100 Message-Id: <1384768311-8824-1-git-send-email-christian.ruppert@abilis.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <20131118094807.GC31741@ab42.lan> References: <20131118094807.GC31741@ab42.lan> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Some ARC users say they can boot faster with without kernel compression. This probably depends on things like the FLASH chip they use etc. Until now, kernel compression can only be disabled by removing "select HAVE_" lines from the architecture Kconfig. So add the Kconfig logic to permit disabling of kernel compression. Signed-off-by: Christian Ruppert --- arch/arc/Kconfig | 2 ++ init/Kconfig | 13 ++++++++++++- 2 files changed, 14 insertions(+), 1 deletions(-) diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig index 2ee0c9b..15f4c3d 100644 --- a/arch/arc/Kconfig +++ b/arch/arc/Kconfig @@ -21,6 +21,8 @@ config ARC select HAVE_ARCH_KGDB select HAVE_ARCH_TRACEHOOK select HAVE_IOREMAP_PROT + select HAVE_KERNEL_UNCOMPRESSED + select HAVE_KERNEL_GZIP select HAVE_KPROBES select HAVE_KRETPROBES select HAVE_MEMBLOCK diff --git a/init/Kconfig b/init/Kconfig index 3fc8a2f..a21e94b 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -97,6 +97,9 @@ config LOCALVERSION_AUTO which is done within the script "scripts/setlocalversion".) +config HAVE_KERNEL_UNCOMPRESSED + bool + config HAVE_KERNEL_GZIP bool @@ -118,7 +121,7 @@ config HAVE_KERNEL_LZ4 choice prompt "Kernel compression mode" default KERNEL_GZIP - depends on HAVE_KERNEL_GZIP || HAVE_KERNEL_BZIP2 || HAVE_KERNEL_LZMA || HAVE_KERNEL_XZ || HAVE_KERNEL_LZO || HAVE_KERNEL_LZ4 + depends on HAVE_KERNEL_GZIP || HAVE_KERNEL_BZIP2 || HAVE_KERNEL_LZMA || HAVE_KERNEL_XZ || HAVE_KERNEL_LZO || HAVE_KERNEL_LZ4 || HAVE_KERNEL_UNCOMPRESSED help The linux kernel is a kind of self-extracting executable. Several compression algorithms are available, which differ @@ -137,6 +140,14 @@ choice If in doubt, select 'gzip' +config KERNEL_UNCOMPRESSED + bool "No compression" + depends on HAVE_KERNEL_UNCOMPRESSED + help + No compression at all. The kernel is huge but the compression and + decompression times are zero. + This is usually not what you want. + config KERNEL_GZIP bool "Gzip" depends on HAVE_KERNEL_GZIP -- 1.7.1