From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vineet Gupta Subject: [PATCH v3 49/71] sysctl: Enable PARISC "unaligned-trap" to be used cross-arch Date: Thu, 24 Jan 2013 16:36:13 +0530 Message-ID: <1359025589-22277-30-git-send-email-vgupta@synopsys.com> References: <1359025589-22277-1-git-send-email-vgupta@synopsys.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: Received: from hermes.synopsys.com ([198.182.44.81]:34155 "EHLO hermes.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754420Ab3AXLLA (ORCPT ); Thu, 24 Jan 2013 06:11:00 -0500 In-Reply-To: <1359025589-22277-1-git-send-email-vgupta@synopsys.com> Sender: linux-arch-owner@vger.kernel.org List-ID: To: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org Cc: arnd@arndb.de, Vineet Gupta , "James E.J. Bottomley" , Helge Deller , "Eric W. Biederman" , Serge Hallyn PARISC defines /proc/sys/kernel/unaligned-trap to runtime toggle unaligned access emulation. The exact mechanics of enablig/disabling are still arch specific, we can make the sysctl usable by other arches. Signed-off-by: Vineet Gupta Acked-by: Helge Deller Cc: "James E.J. Bottomley" Cc: Helge Deller Cc: "Eric W. Biederman" Cc: Serge Hallyn --- arch/parisc/Kconfig | 1 + init/Kconfig | 8 ++++++++ kernel/sysctl.c | 5 +++++ 3 files changed, 14 insertions(+), 0 deletions(-) diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig index b77feff..8c76095 100644 --- a/arch/parisc/Kconfig +++ b/arch/parisc/Kconfig @@ -20,6 +20,7 @@ config PARISC select ARCH_HAVE_NMI_SAFE_CMPXCHG select GENERIC_SMP_IDLE_THREAD select GENERIC_STRNCPY_FROM_USER + select SYSCTL_ARCH_UNALIGN_ALLOW select HAVE_MOD_ARCH_SPECIFIC select MODULES_USE_ELF_RELA select CLONE_BACKWARDS diff --git a/init/Kconfig b/init/Kconfig index be8b7f5..01180da 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -1232,6 +1232,14 @@ config SYSCTL_EXCEPTION_TRACE help Enable support for /proc/sys/debug/exception-trace. +config SYSCTL_ARCH_UNALIGN_ALLOW + bool + help + Enable support for /proc/sys/kernel/unaligned-trap + Allows arches to define/use @unaligned_enabled to runtime toggle + the unaligned access emulation. + see arch/parisc/kernel/unaligned.c for reference + config KALLSYMS bool "Load all symbols for debugging/ksymoops" if EXPERT default y diff --git a/kernel/sysctl.c b/kernel/sysctl.c index c88878d..878b4c4 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -157,6 +157,9 @@ extern int sysctl_tsb_ratio; #ifdef __hppa__ extern int pwrsw_enabled; +#endif + +#ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW extern int unaligned_enabled; #endif @@ -545,6 +548,8 @@ static struct ctl_table kern_table[] = { .mode = 0644, .proc_handler = proc_dointvec, }, +#endif +#ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW { .procname = "unaligned-trap", .data = &unaligned_enabled, -- 1.7.4.1