linux-kernel - [PATCH 3.16 35/86] x86/speculation: Clean up spectre_v2_parse

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Message-ID: <lsq.1558022133.547613@decadent.org.uk>
Date:   Thu, 16 May 2019 16:55:33 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, Denis Kirjanov <kda@...ux-powerpc.org>,
        "Dave Hansen" <dave.hansen@...el.com>,
        "Andi Kleen" <ak@...ux.intel.com>,
        "Ingo Molnar" <mingo@...nel.org>,
        "Asit Mallick" <asit.k.mallick@...el.com>,
        "David Woodhouse" <dwmw@...zon.co.uk>,
        "Thomas Gleixner" <tglx@...utronix.de>,
        "Kees Cook" <keescook@...omium.org>,
        "Jiri Kosina" <jkosina@...e.cz>,
        "Peter Zijlstra" <peterz@...radead.org>,
        "Josh Poimboeuf" <jpoimboe@...hat.com>,
        "Tom Lendacky" <thomas.lendacky@....com>,
        "Greg KH" <gregkh@...uxfoundation.org>,
        "Casey Schaufler" <casey.schaufler@...el.com>,
        "Andy Lutomirski" <luto@...nel.org>,
        "Tim Chen" <tim.c.chen@...ux.intel.com>,
        "Linus Torvalds" <torvalds@...ux-foundation.org>,
        "Jon Masters" <jcm@...hat.com>,
        "Dave Stewart" <david.c.stewart@...el.com>,
        "Waiman Long" <longman9394@...il.com>,
        "Arjan van de Ven" <arjan@...ux.intel.com>,
        "Andrea Arcangeli" <aarcange@...hat.com>
Subject: [PATCH 3.16 35/86] x86/speculation: Clean up spectre_v2_parse_cmdline()

3.16.68-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Tim Chen <tim.c.chen@...ux.intel.com>

commit 24848509aa55eac39d524b587b051f4e86df3c12 upstream.

Remove the unnecessary 'else' statement in spectre_v2_parse_cmdline()
to save an indentation level.

Signed-off-by: Tim Chen <tim.c.chen@...ux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Reviewed-by: Ingo Molnar <mingo@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Jiri Kosina <jkosina@...e.cz>
Cc: Tom Lendacky <thomas.lendacky@....com>
Cc: Josh Poimboeuf <jpoimboe@...hat.com>
Cc: Andrea Arcangeli <aarcange@...hat.com>
Cc: David Woodhouse <dwmw@...zon.co.uk>
Cc: Andi Kleen <ak@...ux.intel.com>
Cc: Dave Hansen <dave.hansen@...el.com>
Cc: Casey Schaufler <casey.schaufler@...el.com>
Cc: Asit Mallick <asit.k.mallick@...el.com>
Cc: Arjan van de Ven <arjan@...ux.intel.com>
Cc: Jon Masters <jcm@...hat.com>
Cc: Waiman Long <longman9394@...il.com>
Cc: Greg KH <gregkh@...uxfoundation.org>
Cc: Dave Stewart <david.c.stewart@...el.com>
Cc: Kees Cook <keescook@...omium.org>
Link: https://lkml.kernel.org/r/20181125185003.688010903@linutronix.de
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 arch/x86/kernel/cpu/bugs.c | 27 +++++++++++++--------------
 1 file changed, 13 insertions(+), 14 deletions(-)

--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -336,22 +336,21 @@ static enum spectre_v2_mitigation_cmd __
 
 	if (cmdline_find_option_bool(boot_command_line, "nospectre_v2"))
 		return SPECTRE_V2_CMD_NONE;
-	else {
-		ret = cmdline_find_option(boot_command_line, "spectre_v2", arg, sizeof(arg));
-		if (ret < 0)
-			return SPECTRE_V2_CMD_AUTO;
 
-		for (i = 0; i < ARRAY_SIZE(mitigation_options); i++) {
-			if (!match_option(arg, ret, mitigation_options[i].option))
-				continue;
-			cmd = mitigation_options[i].cmd;
-			break;
-		}
+	ret = cmdline_find_option(boot_command_line, "spectre_v2", arg, sizeof(arg));
+	if (ret < 0)
+		return SPECTRE_V2_CMD_AUTO;
 
-		if (i >= ARRAY_SIZE(mitigation_options)) {
-			pr_err("unknown option (%s). Switching to AUTO select\n", arg);
-			return SPECTRE_V2_CMD_AUTO;
-		}
+	for (i = 0; i < ARRAY_SIZE(mitigation_options); i++) {
+		if (!match_option(arg, ret, mitigation_options[i].option))
+			continue;
+		cmd = mitigation_options[i].cmd;
+		break;
+	}
+
+	if (i >= ARRAY_SIZE(mitigation_options)) {
+		pr_err("unknown option (%s). Switching to AUTO select\n", arg);
+		return SPECTRE_V2_CMD_AUTO;
 	}
 
 	if ((cmd == SPECTRE_V2_CMD_RETPOLINE ||