From: Andi Kleen <ak@suse.de>
Date: Tue, 11 Sep 2007 12:02:11 +0000 (+0200)
Subject: x86_64: Prevent doing anything from cache_remove_dev() when info setup failed.
X-Git-Url: http://git.rot13.org/?a=commitdiff_plain;h=2966c6a03efd90197582eae8590d82c789475680;p=powerpc.git

x86_64: Prevent doing anything from cache_remove_dev() when info setup failed.

AK: Removed the unlikelies because gcc heuristics default to unlikely
AK: for test == NULL and for negative returns.

Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/arch/i386/kernel/cpu/intel_cacheinfo.c b/arch/i386/kernel/cpu/intel_cacheinfo.c
index d5a456d27d..db6c25aa57 100644
--- a/arch/i386/kernel/cpu/intel_cacheinfo.c
+++ b/arch/i386/kernel/cpu/intel_cacheinfo.c
@@ -515,7 +515,7 @@ static int __cpuinit detect_cache_attributes(unsigned int cpu)
 
 	cpuid4_info[cpu] = kzalloc(
 	    sizeof(struct _cpuid4_info) * num_cache_leaves, GFP_KERNEL);
-	if (unlikely(cpuid4_info[cpu] == NULL))
+	if (cpuid4_info[cpu] == NULL)
 		return -ENOMEM;
 
 	oldmask = current->cpus_allowed;
@@ -748,6 +748,8 @@ static void __cpuinit cache_remove_dev(struct sys_device * sys_dev)
 	unsigned int cpu = sys_dev->id;
 	unsigned long i;
 
+	if (cpuid4_info[cpu] == NULL)
+		return;
 	for (i = 0; i < num_cache_leaves; i++) {
 		cache_remove_shared_cpu_map(cpu, i);
 		kobject_unregister(&(INDEX_KOBJECT_PTR(cpu,i)->kobj));