percpu: make percpu symbols in x86 unique

This patch updates percpu related symbols in x86 such that percpu
symbols are unique and don't clash with local symbols.  This serves
two purposes of decreasing the possibility of global percpu symbol
collision and allowing dropping per_cpu__ prefix from percpu symbols.

* arch/x86/kernel/cpu/common.c: rename local variable to avoid collision

* arch/x86/kvm/svm.c: s/svm_data/sd/ for local variables to avoid collision

* arch/x86/kernel/cpu/cpu_debug.c: s/cpu_arr/cpud_arr/
  				   s/priv_arr/cpud_priv_arr/
				   s/cpu_priv_count/cpud_priv_count/

* arch/x86/kernel/cpu/intel_cacheinfo.c: s/cpuid4_info/ici_cpuid4_info/
  					 s/cache_kobject/ici_cache_kobject/
					 s/index_kobject/ici_index_kobject/

* arch/x86/kernel/ds.c: s/cpu_context/cpu_ds_context/

Partly based on Rusty Russell's "alloc_percpu: rename percpu vars
which cause name clashes" patch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: (kvm) Avi Kivity <avi@redhat.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: x86@kernel.org

1 files changed, 27 insertions, 27 deletions

diff --git a/arch/x86/kernel/cpu/intel_cacheinfo.c b/arch/x86/kernel/cpu/intel_cacheinfo.c
index 804c40e2bc3e..f5ccb4fa5a5d 100644
--- a/arch/x86/kernel/cpu/intel_cacheinfo.c
+++ b/arch/x86/kernel/cpu/intel_cacheinfo.c
@@ -512,8 +512,8 @@ unsigned int __cpuinit init_intel_cacheinfo(struct cpuinfo_x86 *c)
 #ifdef CONFIG_SYSFS
 
 /* pointer to _cpuid4_info array (for each cache leaf) */
-static DEFINE_PER_CPU(struct _cpuid4_info *, cpuid4_info);
-#define CPUID4_INFO_IDX(x, y)   (&((per_cpu(cpuid4_info, x))[y]))
+static DEFINE_PER_CPU(struct _cpuid4_info *, ici_cpuid4_info);
+#define CPUID4_INFO_IDX(x, y)   (&((per_cpu(ici_cpuid4_info, x))[y]))
 
 #ifdef CONFIG_SMP
 static void __cpuinit cache_shared_cpu_map_setup(unsigned int cpu, int index)
@@ -526,7 +526,7 @@ static void __cpuinit cache_shared_cpu_map_setup(unsigned int cpu, int index)
         if ((index == 3) && (c->x86_vendor == X86_VENDOR_AMD)) {
                 struct cpuinfo_x86 *d;
                 for_each_online_cpu(i) {
-                        if (!per_cpu(cpuid4_info, i))
+                        if (!per_cpu(ici_cpuid4_info, i))
                                 continue;
                         d = &cpu_data(i);
                         this_leaf = CPUID4_INFO_IDX(i, index);
@@ -548,7 +548,7 @@ static void __cpuinit cache_shared_cpu_map_setup(unsigned int cpu, int index)
                             c->apicid >> index_msb) {
                                 cpumask_set_cpu(i,
                                         to_cpumask(this_leaf->shared_cpu_map));
-                                if (i != cpu && per_cpu(cpuid4_info, i))  {
+                                if (i != cpu && per_cpu(ici_cpuid4_info, i))  {
                                         sibling_leaf =
                                                 CPUID4_INFO_IDX(i, index);
                                         cpumask_set_cpu(cpu, to_cpumask(
@@ -587,8 +587,8 @@ static void __cpuinit free_cache_attributes(unsigned int cpu)
         for (i = 0; i < num_cache_leaves; i++)
                 cache_remove_shared_cpu_map(cpu, i);
 
-        kfree(per_cpu(cpuid4_info, cpu));
-        per_cpu(cpuid4_info, cpu) = NULL;
+        kfree(per_cpu(ici_cpuid4_info, cpu));
+        per_cpu(ici_cpuid4_info, cpu) = NULL;
 }
 
 static int
@@ -627,15 +627,15 @@ static int __cpuinit detect_cache_attributes(unsigned int cpu)
         if (num_cache_leaves == 0)
                 return -ENOENT;
 
-        per_cpu(cpuid4_info, cpu) = kzalloc(
+        per_cpu(ici_cpuid4_info, cpu) = kzalloc(
             sizeof(struct _cpuid4_info) * num_cache_leaves, GFP_KERNEL);
-        if (per_cpu(cpuid4_info, cpu) == NULL)
+        if (per_cpu(ici_cpuid4_info, cpu) == NULL)
                 return -ENOMEM;
 
         smp_call_function_single(cpu, get_cpu_leaves, &retval, true);
         if (retval) {
-                kfree(per_cpu(cpuid4_info, cpu));
-                per_cpu(cpuid4_info, cpu) = NULL;
+                kfree(per_cpu(ici_cpuid4_info, cpu));
+                per_cpu(ici_cpuid4_info, cpu) = NULL;
         }
 
         return retval;
@@ -647,7 +647,7 @@ static int __cpuinit detect_cache_attributes(unsigned int cpu)
 extern struct sysdev_class cpu_sysdev_class; /* from drivers/base/cpu.c */
 
 /* pointer to kobject for cpuX/cache */
-static DEFINE_PER_CPU(struct kobject *, cache_kobject);
+static DEFINE_PER_CPU(struct kobject *, ici_cache_kobject);
 
 struct _index_kobject {
         struct kobject kobj;
@@ -656,8 +656,8 @@ struct _index_kobject {
 };
 
 /* pointer to array of kobjects for cpuX/cache/indexY */
-static DEFINE_PER_CPU(struct _index_kobject *, index_kobject);
-#define INDEX_KOBJECT_PTR(x, y)         (&((per_cpu(index_kobject, x))[y]))
+static DEFINE_PER_CPU(struct _index_kobject *, ici_index_kobject);
+#define INDEX_KOBJECT_PTR(x, y)         (&((per_cpu(ici_index_kobject, x))[y]))
 
 #define show_one_plus(file_name, object, val)                           \
 static ssize_t show_##file_name                                         \
@@ -876,10 +876,10 @@ static struct kobj_type ktype_percpu_entry = {
 
 static void __cpuinit cpuid4_cache_sysfs_exit(unsigned int cpu)
 {
-        kfree(per_cpu(cache_kobject, cpu));
-        kfree(per_cpu(index_kobject, cpu));
-        per_cpu(cache_kobject, cpu) = NULL;
-        per_cpu(index_kobject, cpu) = NULL;
+        kfree(per_cpu(ici_cache_kobject, cpu));
+        kfree(per_cpu(ici_index_kobject, cpu));
+        per_cpu(ici_cache_kobject, cpu) = NULL;
+        per_cpu(ici_index_kobject, cpu) = NULL;
         free_cache_attributes(cpu);
 }
 
@@ -895,14 +895,14 @@ static int __cpuinit cpuid4_cache_sysfs_init(unsigned int cpu)
                 return err;
 
         /* Allocate all required memory */
-        per_cpu(cache_kobject, cpu) =
+        per_cpu(ici_cache_kobject, cpu) =
                 kzalloc(sizeof(struct kobject), GFP_KERNEL);
-        if (unlikely(per_cpu(cache_kobject, cpu) == NULL))
+        if (unlikely(per_cpu(ici_cache_kobject, cpu) == NULL))
                 goto err_out;
 
-        per_cpu(index_kobject, cpu) = kzalloc(
+        per_cpu(ici_index_kobject, cpu) = kzalloc(
             sizeof(struct _index_kobject) * num_cache_leaves, GFP_KERNEL);
-        if (unlikely(per_cpu(index_kobject, cpu) == NULL))
+        if (unlikely(per_cpu(ici_index_kobject, cpu) == NULL))
                 goto err_out;
 
         return 0;
@@ -926,7 +926,7 @@ static int __cpuinit cache_add_dev(struct sys_device * sys_dev)
         if (unlikely(retval < 0))
                 return retval;
 
-        retval = kobject_init_and_add(per_cpu(cache_kobject, cpu),
+        retval = kobject_init_and_add(per_cpu(ici_cache_kobject, cpu),
                                       &ktype_percpu_entry,
                                       &sys_dev->kobj, "%s", "cache");
         if (retval < 0) {
@@ -940,12 +940,12 @@ static int __cpuinit cache_add_dev(struct sys_device * sys_dev)
                 this_object->index = i;
                 retval = kobject_init_and_add(&(this_object->kobj),
                                               &ktype_cache,
-                                              per_cpu(cache_kobject, cpu),
+                                              per_cpu(ici_cache_kobject, cpu),
                                               "index%1lu", i);
                 if (unlikely(retval)) {
                         for (j = 0; j < i; j++)
                                 kobject_put(&(INDEX_KOBJECT_PTR(cpu, j)->kobj));
-                        kobject_put(per_cpu(cache_kobject, cpu));
+                        kobject_put(per_cpu(ici_cache_kobject, cpu));
                         cpuid4_cache_sysfs_exit(cpu);
                         return retval;
                 }
@@ -953,7 +953,7 @@ static int __cpuinit cache_add_dev(struct sys_device * sys_dev)
         }
         cpumask_set_cpu(cpu, to_cpumask(cache_dev_map));
 
-        kobject_uevent(per_cpu(cache_kobject, cpu), KOBJ_ADD);
+        kobject_uevent(per_cpu(ici_cache_kobject, cpu), KOBJ_ADD);
         return 0;
 }
 
@@ -962,7 +962,7 @@ static void __cpuinit cache_remove_dev(struct sys_device * sys_dev)
         unsigned int cpu = sys_dev->id;
         unsigned long i;
 
-        if (per_cpu(cpuid4_info, cpu) == NULL)
+        if (per_cpu(ici_cpuid4_info, cpu) == NULL)
                 return;
         if (!cpumask_test_cpu(cpu, to_cpumask(cache_dev_map)))
                 return;
@@ -970,7 +970,7 @@ static void __cpuinit cache_remove_dev(struct sys_device * sys_dev)
 
         for (i = 0; i < num_cache_leaves; i++)
                 kobject_put(&(INDEX_KOBJECT_PTR(cpu, i)->kobj));
-        kobject_put(per_cpu(cache_kobject, cpu));
+        kobject_put(per_cpu(ici_cache_kobject, cpu));
         cpuid4_cache_sysfs_exit(cpu);
 }