From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752152Ab3KNIim (ORCPT ); Thu, 14 Nov 2013 03:38:42 -0500 Received: from mail.abilis.ch ([195.70.19.74]:17197 "EHLO mail.abilis.ch" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751284Ab3KNIik (ORCPT ); Thu, 14 Nov 2013 03:38:40 -0500 From: Christian Ruppert To: Pavel Roskin , Andrew Morton Cc: linux-kernel@vger.kernel.org, "H. Peter Anvin" , Vineet Gupta , Noam Camus , Christian Ruppert Subject: [PATCH 1/2] init/Kconfig: add option to disable kernel compression Date: Thu, 14 Nov 2013 09:38:15 +0100 Message-Id: <1384418296-10374-1-git-send-email-christian.ruppert@abilis.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <20131114083247.GB9687@ab42.lan> References: <20131114083247.GB9687@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 | 12 +++++++++++- 2 files changed, 13 insertions(+), 1 deletion(-) diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig index 91dbb27..3991f03 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 3ecd8a1..b1a6f92 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 +121,6 @@ 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 help The linux kernel is a kind of self-extracting executable. Several compression algorithms are available, which differ @@ -137,6 +139,14 @@ choice If in doubt, select 'gzip' +config KERNEL_UNCOMPRESSED + bool "No compression" + depends on HAVE_KERNEL_UNCOMPRESSED || ! ( HAVE_KERNEL_GZIP || HAVE_KERNEL_BZIP2 || HAVE_KERNEL_LZMA || HAVE_KERNEL_XZ || HAVE_KERNEL_LZO || HAVE_KERNEL_LZ4 ) + 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 -- 1.8.4