linux-kernel - [PATCH v1 11/11] perf disasm: Minor layout tweaks for struct arch

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20260122073127.375139-12-irogers@google.com>
Date: Wed, 21 Jan 2026 23:31:27 -0800
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, 
	Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>, 
	James Clark <james.clark@...aro.org>, John Garry <john.g.garry@...cle.com>, 
	Will Deacon <will@...nel.org>, Leo Yan <leo.yan@...ux.dev>, Guo Ren <guoren@...nel.org>, 
	Paul Walmsley <pjw@...nel.org>, Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, 
	Alexandre Ghiti <alex@...ti.fr>, Nathan Chancellor <nathan@...nel.org>, 
	Nick Desaulniers <nick.desaulniers+lkml@...il.com>, Bill Wendling <morbo@...gle.com>, 
	Justin Stitt <justinstitt@...gle.com>, Zecheng Li <zecheng@...gle.com>, 
	Tianyou Li <tianyou.li@...el.com>, Thomas Falcon <thomas.falcon@...el.com>, 
	Julia Lawall <Julia.Lawall@...ia.fr>, Suchit Karunakaran <suchitkarunakaran@...il.com>, 
	Athira Rajeev <atrajeev@...ux.ibm.com>, Aditya Bodkhe <aditya.b1@...ux.ibm.com>, 
	Howard Chu <howardchu95@...il.com>, 
	"Krzysztof Łopatowski" <krzysztof.m.lopatowski@...il.com>, 
	"Dr. David Alan Gilbert" <linux@...blig.org>, Shimin Guo <shimin.guo@...dio.com>, 
	Sergei Trofimovich <slyich@...il.com>, linux-kernel@...r.kernel.org, 
	linux-perf-users@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
	linux-csky@...r.kernel.org, linux-riscv@...ts.infradead.org
Subject: [PATCH v1 11/11] perf disasm: Minor layout tweaks for struct arch

Pack some holes to bring down the overall struct size from 96 to 88
bytes.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/util/disasm.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/tools/perf/util/disasm.h b/tools/perf/util/disasm.h
index 2793d48aa04e..6a1905f9d4fc 100644
--- a/tools/perf/util/disasm.h
+++ b/tools/perf/util/disasm.h
@@ -18,22 +18,22 @@ struct type_state;
 struct disasm_line;
 
 struct e_machine_and_e_flags {
-	uint16_t e_machine;
 	uint32_t e_flags;
+	uint16_t e_machine;
 };
 
 struct arch {
-	/** @id: ELF machine and flags associated with arch. */
-	struct e_machine_and_e_flags id;
 	/** @name: name such as "x86" or "powerpc". */
 	const char		*name;
 	const struct ins	*instructions;
 	size_t			nr_instructions;
 	size_t			nr_instructions_allocated;
-	bool			sorted_instructions;
 	const char		*insn_suffix;
 	unsigned int		model;
 	unsigned int		family;
+	/** @id: ELF machine and flags associated with arch. */
+	struct e_machine_and_e_flags id;
+	bool			sorted_instructions;
 	struct		{
 		char comment_char;
 		char skip_functions_char;
-- 
2.52.0.457.g6b5491de43-goog