x86_64: Prevent doing anything from cache_remove_dev() when info setu…

…p 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>

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));