1 files changed, 46 insertions, 47 deletions

diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index 9737a76..8c3aa14 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -357,10 +357,10 @@ static inline int kprobe_aggrprobe(struct kprobe *p)
 /*
  * Keep all fields in the kprobe consistent
  */
-static inline void copy_kprobe(struct kprobe *old_p, struct kprobe *p)
+static inline void copy_kprobe(struct kprobe *ap, struct kprobe *p)
 {
-	memcpy(&p->opcode, &old_p->opcode, sizeof(kprobe_opcode_t));
-	memcpy(&p->ainsn, &old_p->ainsn, sizeof(struct arch_specific_insn));
+	memcpy(&p->opcode, &ap->opcode, sizeof(kprobe_opcode_t));
+	memcpy(&p->ainsn, &ap->ainsn, sizeof(struct arch_specific_insn));
 }
 
 #ifdef CONFIG_OPTPROBES
@@ -671,12 +671,12 @@ int proc_kprobes_optimization_handler(struct ctl_table *table, int write,
 
 static void __kprobes __arm_kprobe(struct kprobe *p)
 {
-	struct kprobe *old_p;
+	struct kprobe *_p;
 
 	/* Check collision with other optimized kprobes */
-	old_p = get_optimized_kprobe((unsigned long)p->addr);
-	if (unlikely(old_p))
-		unoptimize_kprobe(old_p); /* Fallback to unoptimized kprobe */
+	_p = get_optimized_kprobe((unsigned long)p->addr);
+	if (unlikely(_p))
+		unoptimize_kprobe(_p); /* Fallback to unoptimized kprobe */
 
 	arch_arm_kprobe(p);
 	optimize_kprobe(p);	/* Try to optimize (add kprobe to a list) */
@@ -684,15 +684,15 @@ static void __kprobes __arm_kprobe(struct kprobe *p)
 
 static void __kprobes __disarm_kprobe(struct kprobe *p)
 {
-	struct kprobe *old_p;
+	struct kprobe *_p;
 
 	unoptimize_kprobe(p);	/* Try to unoptimize */
 	arch_disarm_kprobe(p);
 
 	/* If another kprobe was blocked, optimize it. */
-	old_p = get_optimized_kprobe((unsigned long)p->addr);
-	if (unlikely(old_p))
-		optimize_kprobe(old_p);
+	_p = get_optimized_kprobe((unsigned long)p->addr);
+	if (unlikely(_p))
+		optimize_kprobe(_p);
 }
 
 #else /* !CONFIG_OPTPROBES */
@@ -993,18 +993,18 @@ static void __kprobes init_aggr_kprobe(struct kprobe *ap, struct kprobe *p)
  * This is the second or subsequent kprobe at the address - handle
  * the intricacies
  */
-static int __kprobes register_aggr_kprobe(struct kprobe *old_p,
+static int __kprobes register_aggr_kprobe(struct kprobe *orig_p,
 					  struct kprobe *p)
 {
 	int ret = 0;
-	struct kprobe *ap = old_p;
+	struct kprobe *ap = orig_p;
 
-	if (!kprobe_aggrprobe(old_p)) {
-		/* If old_p is not an aggr_kprobe, create new aggr_kprobe. */
-		ap = alloc_aggr_kprobe(old_p);
+	if (!kprobe_aggrprobe(orig_p)) {
+		/* If orig_p is not an aggr_kprobe, create new aggr_kprobe. */
+		ap = alloc_aggr_kprobe(orig_p);
 		if (!ap)
 			return -ENOMEM;
-		init_aggr_kprobe(ap, old_p);
+		init_aggr_kprobe(ap, orig_p);
 	}
 
 	if (kprobe_gone(ap)) {
@@ -1098,34 +1098,33 @@ static kprobe_opcode_t __kprobes *kprobe_addr(struct kprobe *p)
 /* Check passed kprobe is valid and return kprobe in kprobe_table. */
 static struct kprobe * __kprobes __get_valid_kprobe(struct kprobe *p)
 {
-	struct kprobe *old_p, *list_p;
+	struct kprobe *ap, *list_p;
 
-	old_p = get_kprobe(p->addr);
-	if (unlikely(!old_p))
+	ap = get_kprobe(p->addr);
+	if (unlikely(!ap))
 		return NULL;
 
-	if (p != old_p) {
-		list_for_each_entry_rcu(list_p, &old_p->list, list)
+	if (p != ap) {
+		list_for_each_entry_rcu(list_p, &ap->list, list)
 			if (list_p == p)
 			/* kprobe p is a valid probe */
 				goto valid;
 		return NULL;
 	}
 valid:
-	return old_p;
+	return ap;
 }
 
 /* Return error if the kprobe is being re-registered */
 static inline int check_kprobe_rereg(struct kprobe *p)
 {
 	int ret = 0;
-	struct kprobe *old_p;
 
 	mutex_lock(&kprobe_mutex);
-	old_p = __get_valid_kprobe(p);
-	if (old_p)
+	if (__get_valid_kprobe(p))
 		ret = -EINVAL;
 	mutex_unlock(&kprobe_mutex);
+
 	return ret;
 }
 
@@ -1234,43 +1233,43 @@ EXPORT_SYMBOL_GPL(register_kprobe);
  */
 static int __kprobes __unregister_kprobe_top(struct kprobe *p)
 {
-	struct kprobe *old_p, *list_p;
+	struct kprobe *ap, *list_p;
 
-	old_p = __get_valid_kprobe(p);
-	if (old_p == NULL)
+	ap = __get_valid_kprobe(p);
+	if (ap == NULL)
 		return -EINVAL;
 
-	if (old_p == p ||
-	    (kprobe_aggrprobe(old_p) &&
-	     list_is_singular(&old_p->list))) {
+	if (ap == p ||
+	    (kprobe_aggrprobe(ap) &&
+	     list_is_singular(&ap->list))) {
 		/*
 		 * Only probe on the hash list. Disarm only if kprobes are
 		 * enabled and not gone - otherwise, the breakpoint would
 		 * already have been removed. We save on flushing icache.
 		 */
-		if (!kprobes_all_disarmed && !kprobe_disabled(old_p))
-			disarm_kprobe(old_p);
-		hlist_del_rcu(&old_p->hlist);
+		if (!kprobes_all_disarmed && !kprobe_disabled(ap))
+			disarm_kprobe(ap);
+		hlist_del_rcu(&ap->hlist);
 	} else {
 		if (p->break_handler && !kprobe_gone(p))
-			old_p->break_handler = NULL;
+			ap->break_handler = NULL;
 		if (p->post_handler && !kprobe_gone(p)) {
-			list_for_each_entry_rcu(list_p, &old_p->list, list) {
+			list_for_each_entry_rcu(list_p, &ap->list, list) {
 				if ((list_p != p) && (list_p->post_handler))
 					goto noclean;
 			}
-			old_p->post_handler = NULL;
+			ap->post_handler = NULL;
 		}
 noclean:
 		list_del_rcu(&p->list);
-		if (!kprobe_disabled(old_p)) {
-			try_to_disable_aggr_kprobe(old_p);
+		if (!kprobe_disabled(ap)) {
+			try_to_disable_aggr_kprobe(ap);
 			if (!kprobes_all_disarmed) {
-				if (kprobe_disabled(old_p))
-					disarm_kprobe(old_p);
+				if (kprobe_disabled(ap))
+					disarm_kprobe(ap);
 				else
 					/* Try to optimize this probe again */
-					optimize_kprobe(old_p);
+					optimize_kprobe(ap);
 			}
 		}
 	}
@@ -1279,16 +1278,16 @@ noclean:
 
 static void __kprobes __unregister_kprobe_bottom(struct kprobe *p)
 {
-	struct kprobe *old_p;
+	struct kprobe *ap;
 
 	if (list_empty(&p->list))
 		arch_remove_kprobe(p);
 	else if (list_is_singular(&p->list)) {
 		/* "p" is the last child of an aggr_kprobe */
-		old_p = list_entry(p->list.next, struct kprobe, list);
+		ap = list_entry(p->list.next, struct kprobe, list);
 		list_del(&p->list);
-		arch_remove_kprobe(old_p);
-		free_aggr_kprobe(old_p);
+		arch_remove_kprobe(ap);
+		free_aggr_kprobe(ap);
 	}
 }