From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from out4436.biz.mail.alibaba.com ([47.88.44.36]:13527 "EHLO out4436.biz.mail.alibaba.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729896AbfKHHLZ (ORCPT ); Fri, 8 Nov 2019 02:11:25 -0500 From: shile.zhang@linux.alibaba.com Subject: [RFC PATCH v2 3/3] x86/unwind/orc: remove run-time ORC unwind tables sort Date: Fri, 8 Nov 2019 15:11:08 +0800 Message-Id: <20191108071108.72132-4-shile.zhang@linux.alibaba.com> In-Reply-To: <20191108071108.72132-1-shile.zhang@linux.alibaba.com> References: <20191108071108.72132-1-shile.zhang@linux.alibaba.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kbuild-owner@vger.kernel.org List-ID: To: Masahiro Yamada , Michal Marek , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Josh Poimboeuf , x86@kernel.org Cc: "H . Peter Anvin" , linux-kernel@vger.kernel.org, linux-kbuild@vger.kernel.org, Shile Zhang From: Shile Zhang The orc_unwind and orc_unwind_ip tables are sorted in vmlinux link phase at build time, just remove the run-time sort. Signed-off-by: Shile Zhang --- arch/x86/kernel/unwind_orc.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/arch/x86/kernel/unwind_orc.c b/arch/x86/kernel/unwind_orc.c index 332ae6530fa8..eccb9ac1e2fe 100644 --- a/arch/x86/kernel/unwind_orc.c +++ b/arch/x86/kernel/unwind_orc.c @@ -273,9 +273,10 @@ void __init unwind_init(void) return; } - /* Sort the .orc_unwind and .orc_unwind_ip tables: */ - sort(__start_orc_unwind_ip, num_entries, sizeof(int), orc_sort_cmp, - orc_sort_swap); + /* + * Note, orc_unwind and orc_unwind_ip tables has been sorted in + * vmlinux link phase at build time. Its ready for binary search. + */ /* Initialize the fast lookup table: */ lookup_num_blocks = orc_lookup_end - orc_lookup; -- 2.24.0.rc2