linux-kernel - linux-next: build failure after merge of the driver-core tree

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Date:	Thu, 5 Jan 2012 17:28:56 +1100
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Greg KH <greg@...ah.com>
Cc:	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>,
	Borislav Petkov <borislav.petkov@....com>,
	Jan Beulich <JBeulich@...e.com>,
	Kay Sievers <kay.sievers@...y.org>
Subject: linux-next: build failure after merge of the driver-core tree

Hi Greg,

After merging the driver-core tree, today's linux-next build (x86_64
allmodconfig) failed like this:

arch/x86/kernel/microcode_core.c: In function 'microcode_init':
arch/x86/kernel/microcode_core.c:557:2: error: implicit declaration of function 'sysdev_driver_unregister' [-Werror=implicit-function-declaration]
arch/x86/kernel/microcode_core.c:557:28: error: 'cpu_sysdev_class' undeclared (first use in this function)
arch/x86/kernel/microcode_core.c:557:47: error: 'mc_sysdev_driver' undeclared (first use in this function)

Caused by commit 8a25a2fd126c ("cpu: convert 'cpu' and 'machinecheck'
sysdev_class to a regular subsystem") interacting with commit
bd399063976c ("x86, microcode: Fix the failure path of microcode update
driver init code") which was added to Linux' tree in v3.2-rc5,

I have applied the following merge fix patch:

From e4aefaed98c4462d5d5d71099756606b547e7364 Mon Sep 17 00:00:00 2001
From: Stephen Rothwell <sfr@...b.auug.org.au>
Date: Thu, 5 Jan 2012 17:26:14 +1100
Subject: [PATCH] cpu: fix up for sysdev removal

Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
---
 arch/x86/kernel/microcode_core.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/microcode_core.c b/arch/x86/kernel/microcode_core.c
index ef127e54..fb34a56 100644
--- a/arch/x86/kernel/microcode_core.c
+++ b/arch/x86/kernel/microcode_core.c
@@ -540,7 +540,7 @@ static int __init microcode_init(void)
 
 	error = microcode_dev_init();
 	if (error)
-		goto out_sysdev_driver;
+		goto out_driver;
 
 	register_syscore_ops(&mc_syscore_ops);
 	register_hotcpu_notifier(&mc_cpu_notifier);
@@ -550,11 +550,11 @@ static int __init microcode_init(void)
 
 	return 0;
 
-out_sysdev_driver:
+out_driver:
 	get_online_cpus();
 	mutex_lock(&microcode_mutex);
 
-	sysdev_driver_unregister(&cpu_sysdev_class, &mc_sysdev_driver);
+	subsys_interface_unregister(&mc_cpu_interface);
 
 	mutex_unlock(&microcode_mutex);
 	put_online_cpus();
-- 
1.7.8.197.g73c6b

-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au
http://www.canb.auug.org.au/~sfr/

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