linux-kernel - [PATCH 3.16 29/86] x86/speculation: Remove SPECTRE_V2_IBRS in enum spectre_v2

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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>,
        zhong.weidong@....com.cn, konrad.wilk@...cle.com, hpa@...or.com,
        bp@...e.de, "Jiang Biao" <jiang.biao2@....com.cn>,
        "Thomas Gleixner" <tglx@...utronix.de>, dwmw2@...zon.co.uk
Subject: [PATCH 3.16 29/86] x86/speculation: Remove SPECTRE_V2_IBRS in
 enum spectre_v2_mitigation

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

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

From: Jiang Biao <jiang.biao2@....com.cn>

commit d9f4426c73002957be5dd39936f44a09498f7560 upstream.

SPECTRE_V2_IBRS in enum spectre_v2_mitigation is never used. Remove it.

Signed-off-by: Jiang Biao <jiang.biao2@....com.cn>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: hpa@...or.com
Cc: dwmw2@...zon.co.uk
Cc: konrad.wilk@...cle.com
Cc: bp@...e.de
Cc: zhong.weidong@....com.cn
Link: https://lkml.kernel.org/r/1531872194-39207-1-git-send-email-jiang.biao2@zte.com.cn
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 arch/x86/include/asm/nospec-branch.h | 1 -
 1 file changed, 1 deletion(-)

--- a/arch/x86/include/asm/nospec-branch.h
+++ b/arch/x86/include/asm/nospec-branch.h
@@ -169,7 +169,6 @@ enum spectre_v2_mitigation {
 	SPECTRE_V2_RETPOLINE_MINIMAL_AMD,
 	SPECTRE_V2_RETPOLINE_GENERIC,
 	SPECTRE_V2_RETPOLINE_AMD,
-	SPECTRE_V2_IBRS,
 	SPECTRE_V2_IBRS_ENHANCED,
 };