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[2620:137:e000::1:20]) by mx.google.com with ESMTP id p126-20020a62d084000000b005a8a9d14496si22346303pfg.47.2023.02.23.00.40.14; Thu, 23 Feb 2023 00:40:27 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@linutronix.de header.s=2020 header.b=sewb1Gia; dkim=neutral (no key) header.i=@linutronix.de header.s=2020e; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=linutronix.de Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233160AbjBWIc3 (ORCPT <rfc822;cambridge8321@gmail.com> + 99 others); Thu, 23 Feb 2023 03:32:29 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55830 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233618AbjBWIcN (ORCPT <rfc822;linux-kernel@vger.kernel.org>); Thu, 23 Feb 2023 03:32:13 -0500 Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3B38E4D61C; Thu, 23 Feb 2023 00:32:12 -0800 (PST) Date: Thu, 23 Feb 2023 08:32:07 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1677141127; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=EwrNXKne5HFSSFx4JRcNK7XBvrwT67vvQbynXrqu29I=; b=sewb1GiaNKXzHcGfnKramAq3JUbWX6u9jIEN3xN7FT7xwYpF3M0aGpRIY/wDBhyCay10Q1 OKi3A43o3SsOE4zkfaImcVREV77ZD/NHLhilARbdexxVOWypgJ3Mn934aAOW3umulo5Jib RLV/EDU5FFYh2wkr8V8iwY59YOgFJ8HPhgxjpOOgWrjLlQM4tjC7E2jVLDdqyoF9BzIIyy uBNOPTl0Wm3n9CPDHO5+/beILT5/ZfEsYKHWp+AaFItaHsU1e8fcN8wNLBmRGYt3qdk6FT Lk6Z/NYxonleswsSQa7LaATOgXtVTXkuoGq8dP5LDy81dyp/Ko4feMqaUU2jGg== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1677141127; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=EwrNXKne5HFSSFx4JRcNK7XBvrwT67vvQbynXrqu29I=; b=Yksa79cls4Z+m/mHfdXOIeXs0w4+kIxzarKneeAQcqXwafzBcgIJ0RvZ5i2zLmukk+Yub/ W2nSf6BvbX/XkHCg== From: "tip-bot2 for Peter Zijlstra" <tip-bot2@linutronix.de> Sender: tip-bot2@linutronix.de Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: objtool/core] objtool: Shrink instruction::{type,visited} Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org>, Ingo Molnar <mingo@kernel.org>, Josh Poimboeuf <jpoimboe@kernel.org>, Nathan Chancellor <nathan@kernel.org>, linux@weissschuh.net, x86@kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20230208172245.501847188@infradead.org> References: <20230208172245.501847188@infradead.org> MIME-Version: 1.0 Message-ID: <167714112746.5837.4736451316414863518.tip-bot2@tip-bot2> Robot-ID: <tip-bot2@linutronix.de> Robot-Unsubscribe: Contact <mailto:tglx@linutronix.de> to get blacklisted from these emails Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_NONE, SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: <linux-kernel.vger.kernel.org> X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1757285032051679816?= X-GMAIL-MSGID: =?utf-8?q?1758610459286072543?= |
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[tip:,objtool/core] objtool: Shrink instruction::{type,visited}
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Commit Message
tip-bot2 for Thomas Gleixner
Feb. 23, 2023, 8:32 a.m. UTC
The following commit has been merged into the objtool/core branch of tip: Commit-ID: 8b2de412158ecdb312c707918432e6650df808cc Gitweb: https://git.kernel.org/tip/8b2de412158ecdb312c707918432e6650df808cc Author: Peter Zijlstra <peterz@infradead.org> AuthorDate: Wed, 08 Feb 2023 18:18:00 +01:00 Committer: Ingo Molnar <mingo@kernel.org> CommitterDate: Thu, 23 Feb 2023 09:21:12 +01:00 objtool: Shrink instruction::{type,visited} Since we don't have that many types in enum insn_type, force it into a u8 and re-arrange member to get rid of the holes, saves another 8 bytes. struct instruction { struct list_head list; /* 0 16 */ struct hlist_node hash; /* 16 16 */ struct list_head call_node; /* 32 16 */ struct section * sec; /* 48 8 */ long unsigned int offset; /* 56 8 */ /* --- cacheline 1 boundary (64 bytes) --- */ - unsigned int len; /* 64 4 */ - enum insn_type type; /* 68 4 */ - long unsigned int immediate; /* 72 8 */ - u16 dead_end:1; /* 80: 0 2 */ - u16 ignore:1; /* 80: 1 2 */ - u16 ignore_alts:1; /* 80: 2 2 */ - u16 hint:1; /* 80: 3 2 */ - u16 save:1; /* 80: 4 2 */ - u16 restore:1; /* 80: 5 2 */ - u16 retpoline_safe:1; /* 80: 6 2 */ - u16 noendbr:1; /* 80: 7 2 */ - u16 entry:1; /* 80: 8 2 */ + long unsigned int immediate; /* 64 8 */ + unsigned int len; /* 72 4 */ + u8 type; /* 76 1 */ - /* XXX 7 bits hole, try to pack */ + /* Bitfield combined with previous fields */ - s8 instr; /* 82 1 */ - u8 visited; /* 83 1 */ + u16 dead_end:1; /* 76: 8 2 */ + u16 ignore:1; /* 76: 9 2 */ + u16 ignore_alts:1; /* 76:10 2 */ + u16 hint:1; /* 76:11 2 */ + u16 save:1; /* 76:12 2 */ + u16 restore:1; /* 76:13 2 */ + u16 retpoline_safe:1; /* 76:14 2 */ + u16 noendbr:1; /* 76:15 2 */ + u16 entry:1; /* 78: 0 2 */ + u16 visited:4; /* 78: 1 2 */ - /* XXX 4 bytes hole, try to pack */ + /* XXX 3 bits hole, try to pack */ + /* Bitfield combined with next fields */ - struct alt_group * alt_group; /* 88 8 */ - struct symbol * call_dest; /* 96 8 */ - struct instruction * jump_dest; /* 104 8 */ - struct instruction * first_jump_src; /* 112 8 */ - struct reloc * jump_table; /* 120 8 */ + s8 instr; /* 79 1 */ + struct alt_group * alt_group; /* 80 8 */ + struct symbol * call_dest; /* 88 8 */ + struct instruction * jump_dest; /* 96 8 */ + struct instruction * first_jump_src; /* 104 8 */ + struct reloc * jump_table; /* 112 8 */ + struct reloc * reloc; /* 120 8 */ /* --- cacheline 2 boundary (128 bytes) --- */ - struct reloc * reloc; /* 128 8 */ - struct alternative * alts; /* 136 8 */ - struct symbol * sym; /* 144 8 */ - struct stack_op * stack_ops; /* 152 8 */ - struct cfi_state * cfi; /* 160 8 */ + struct alternative * alts; /* 128 8 */ + struct symbol * sym; /* 136 8 */ + struct stack_op * stack_ops; /* 144 8 */ + struct cfi_state * cfi; /* 152 8 */ - /* size: 168, cachelines: 3, members: 29 */ - /* sum members: 162, holes: 1, sum holes: 4 */ - /* sum bitfield members: 9 bits, bit holes: 1, sum bit holes: 7 bits */ - /* last cacheline: 40 bytes */ + /* size: 160, cachelines: 3, members: 29 */ + /* sum members: 158 */ + /* sum bitfield members: 13 bits, bit holes: 1, sum bit holes: 3 bits */ + /* last cacheline: 32 bytes */ }; pre: 5:48.86 real, 220.30 user, 128.34 sys, 24834672 mem post: 5:48.89 real, 220.96 user, 127.55 sys, 24834672 mem Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Acked-by: Josh Poimboeuf <jpoimboe@kernel.org> Tested-by: Nathan Chancellor <nathan@kernel.org> # build only Tested-by: Thomas Weißschuh <linux@weissschuh.net> # compile and run Link: https://lore.kernel.org/r/20230208172245.501847188@infradead.org --- tools/objtool/include/objtool/check.h | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/tools/objtool/include/objtool/check.h b/tools/objtool/include/objtool/check.h index 7966f60..a497ee7 100644 --- a/tools/objtool/include/objtool/check.h +++ b/tools/objtool/include/objtool/check.h @@ -42,9 +42,9 @@ struct instruction { struct list_head call_node; struct section *sec; unsigned long offset; - unsigned int len; - enum insn_type type; unsigned long immediate; + unsigned int len; + u8 type; u16 dead_end : 1, ignore : 1, @@ -54,11 +54,11 @@ struct instruction { restore : 1, retpoline_safe : 1, noendbr : 1, - entry : 1; - /* 7 bit hole */ + entry : 1, + visited : 4; + /* 3 bit hole */ s8 instr; - u8 visited; struct alt_group *alt_group; struct symbol *call_dest;