From 2966c6a03efd90197582eae8590d82c789475680 Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Tue, 11 Sep 2007 14:02:11 +0200 Subject: [PATCH] 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 Cc: Ashok Raj Cc: Akinobu Mita Signed-off-by: Jan Beulich Signed-off-by: Andi Kleen Signed-off-by: Linus Torvalds --- arch/i386/kernel/cpu/intel_cacheinfo.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/i386/kernel/cpu/intel_cacheinfo.c b/arch/i386/kernel/cpu/intel_cacheinfo.c index d5a456d27d82..db6c25aa5776 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)); -- 2.20.1