linux-kernel - Re: [PATCH 4.14 000/115] 4.14.120-stable review

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Date:   Wed, 15 May 2019 09:26:38 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org,
        akpm@...ux-foundation.org, shuah@...nel.org, patches@...nelci.org,
        ben.hutchings@...ethink.co.uk, lkft-triage@...ts.linaro.org,
        stable@...r.kernel.org
Subject: Re: [PATCH 4.14 000/115] 4.14.120-stable review

On Wed, May 15, 2019 at 12:54:40PM +0200, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 4.14.120 release.
> There are 115 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Fri 17 May 2019 09:04:39 AM UTC.
> Anything received after that time might be too late.
> 

There is a build error with s390 builds.

arch/s390/kernel/nospec-branch.c: In function 'nospec_auto_detect':
arch/s390/kernel/nospec-branch.c:84:19: error:
	invalid storage class for function 'spectre_v2_setup_early'

arch/s390/kernel/nospec-branch.c:96:27: error:
	initializer element is not constant

and more. The file has merge damage in function nospec_auto_detect().
Culprit is commit 91788fcb21d0 ("s390/speculation: Support 'mitigations='
cmdline option"). That patch is in v4.14.119, so you'll have to patch
it up manually. Example patch (compile tested) below.

Guenter

---
>From c4430ee29bf57cb1327d52b38acf3f616be9d7f5 Mon Sep 17 00:00:00 2001
From: Guenter Roeck <linux@...ck-us.net>
Date: Wed, 15 May 2019 09:22:31 -0700
Subject: [PATCH] s390/speculation: Fix build error caused by bad backport

The backport of commit 0336e04a6520 ("s390/speculation: Support
'mitigations=' cmdline option") introduces a build error. Fix it up.

Fixes: 91788fcb21d0 ("s390/speculation: Support 'mitigations=' cmdline option")
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
---
 arch/s390/kernel/nospec-branch.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/s390/kernel/nospec-branch.c b/arch/s390/kernel/nospec-branch.c
index 83e597688562..6956902bba12 100644
--- a/arch/s390/kernel/nospec-branch.c
+++ b/arch/s390/kernel/nospec-branch.c
@@ -66,6 +66,7 @@ void __init nospec_auto_detect(void)
 		if (IS_ENABLED(CC_USING_EXPOLINE))
 			nospec_disable = 1;
 		__clear_facility(82, S390_lowcore.alt_stfle_fac_list);
+	}
 	if (IS_ENABLED(CC_USING_EXPOLINE)) {
 		/*
 		 * The kernel has been compiled with expolines.
-- 
2.7.4