From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757630Ab2JYApR (ORCPT ); Wed, 24 Oct 2012 20:45:17 -0400 Received: from wolverine01.qualcomm.com ([199.106.114.254]:1987 "EHLO wolverine01.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750894Ab2JYApP (ORCPT ); Wed, 24 Oct 2012 20:45:15 -0400 X-IronPort-AV: E=McAfee;i="5400,1158,6875"; a="1620146" From: Stephen Boyd To: Russell King Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, David Daney Subject: [PATCHv3] ARM: Sort exception table at compile time Date: Wed, 24 Oct 2012 17:44:42 -0700 Message-Id: <1351125882-13046-1-git-send-email-sboyd@codeaurora.org> X-Mailer: git-send-email 1.8.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add the ARM machine identifier to sortextable and select the config option so that we can sort the exception table at compile time. sortextable relies on a section named __ex_table existing in the vmlinux, but ARM's linker script places the exception table in the data section. Give the exception table its own section so that sortextable can find it. This allows us to skip the sorting step during boot. Cc: David Daney Signed-off-by: Stephen Boyd --- Changes since v2: * Refreshed against linux-next arch/arm/Kconfig | 1 + arch/arm/kernel/vmlinux.lds.S | 19 +++++++++---------- scripts/sortextable.c | 1 + 3 files changed, 11 insertions(+), 10 deletions(-) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 73067ef..208414c 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -5,6 +5,7 @@ config ARM select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE select ARCH_HAVE_CUSTOM_GPIO_H select ARCH_WANT_IPC_PARSE_VERSION + select BUILDTIME_EXTABLE_SORT if MMU select CPU_PM if (SUSPEND || CPU_IDLE) select DCACHE_WORD_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && !CPU_BIG_ENDIAN select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI) diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S index 36ff15b..b9f38e3 100644 --- a/arch/arm/kernel/vmlinux.lds.S +++ b/arch/arm/kernel/vmlinux.lds.S @@ -114,6 +114,15 @@ SECTIONS RO_DATA(PAGE_SIZE) + . = ALIGN(4); + __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { + __start___ex_table = .; +#ifdef CONFIG_MMU + *(__ex_table) +#endif + __stop___ex_table = .; + } + #ifdef CONFIG_ARM_UNWIND /* * Stack unwinding tables @@ -220,16 +229,6 @@ SECTIONS READ_MOSTLY_DATA(L1_CACHE_BYTES) /* - * The exception fixup table (might need resorting at runtime) - */ - . = ALIGN(4); - __start___ex_table = .; -#ifdef CONFIG_MMU - *(__ex_table) -#endif - __stop___ex_table = .; - - /* * and the usual data section */ DATA_DATA diff --git a/scripts/sortextable.c b/scripts/sortextable.c index f19ddc4..1f10e89 100644 --- a/scripts/sortextable.c +++ b/scripts/sortextable.c @@ -248,6 +248,7 @@ do_file(char const *const fname) case EM_S390: custom_sort = sort_relative_table; break; + case EM_ARM: case EM_MIPS: break; } /* end switch */ -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, hosted by The Linux Foundation