kprobes: use hlist_for_each_entry

Index: linux-2.6/kernel/kprobes.c
===================================================================
@@ -133,8 +133,7 @@ kprobe_opcode_t __kprobes *get_insn_slot
 	struct hlist_node *pos;
 
       retry:
-	hlist_for_each(pos, &kprobe_insn_pages) {
-		kip = hlist_entry(pos, struct kprobe_insn_page, hlist);
+	hlist_for_each_entry(kip, pos, &kprobe_insn_pages, hlist) {
 		if (kip->nused < INSNS_PER_PAGE) {
 			int i;
 			for (i = 0; i < INSNS_PER_PAGE; i++) {

@@ -213,9 +212,8 @@ static int __kprobes collect_garbage_slo
 	if (check_safety() != 0)
 		return -EAGAIN;
 
-	hlist_for_each_safe(pos, next, &kprobe_insn_pages) {
+	hlist_for_each_entry_safe(kip, pos, next, &kprobe_insn_pages, hlist) {
 		int i;
-		kip = hlist_entry(pos, struct kprobe_insn_page, hlist);
 		if (kip->ngarbage == 0)
 			continue;
 		kip->ngarbage = 0;	/* we will collect all garbages */

@@ -234,8 +232,7 @@ void __kprobes free_insn_slot(kprobe_opc
 	struct kprobe_insn_page *kip;
 	struct hlist_node *pos;
 
-	hlist_for_each(pos, &kprobe_insn_pages) {
-		kip = hlist_entry(pos, struct kprobe_insn_page, hlist);
+	hlist_for_each_entry(kip, pos, &kprobe_insn_pages, hlist) {
 		if (kip->insns <= slot &&
 		    slot < kip->insns + (INSNS_PER_PAGE * MAX_INSN_SIZE)) {
 			int i = (slot - kip->insns) / MAX_INSN_SIZE;