[PATCH] some irq_chip variables point to NULL

[linux-2.6] / kernel / kprobes.c

diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index f66b8e681b4dfb8f5fbe5914d958f2d7b402fd4a..610c837ad9e0aa8923f48541aaa7ea903c6b2fd2 100644 (file)
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -319,7 +319,8 @@ void __kprobes add_rp_inst(struct kretprobe_instance *ri)
 }
 
 /* Called with kretprobe_lock held */
-void __kprobes recycle_rp_inst(struct kretprobe_instance *ri)
+void __kprobes recycle_rp_inst(struct kretprobe_instance *ri,
+                               struct hlist_head *head)
 {
        /* remove rp inst off the rprobe_inst_table */
        hlist_del(&ri->hlist);
@@ -331,7 +332,7 @@ void __kprobes recycle_rp_inst(struct kretprobe_instance *ri)
                hlist_add_head(&ri->uflist, &ri->rp->free_instances);
        } else
                /* Unregistering */
-               kfree(ri);
+               hlist_add_head(&ri->hlist, head);
 }
 
 struct hlist_head __kprobes *kretprobe_inst_table_head(struct task_struct *tsk)
@@ -347,18 +348,24 @@ struct hlist_head __kprobes *kretprobe_inst_table_head(struct task_struct *tsk)
  */
 void __kprobes kprobe_flush_task(struct task_struct *tk)
 {
-        struct kretprobe_instance *ri;
-        struct hlist_head *head;
+       struct kretprobe_instance *ri;
+       struct hlist_head *head, empty_rp;
        struct hlist_node *node, *tmp;
        unsigned long flags = 0;
 
+       INIT_HLIST_HEAD(&empty_rp);
        spin_lock_irqsave(&kretprobe_lock, flags);
-        head = kretprobe_inst_table_head(tk);
-        hlist_for_each_entry_safe(ri, node, tmp, head, hlist) {
-                if (ri->task == tk)
-                        recycle_rp_inst(ri);
-        }
+       head = kretprobe_inst_table_head(tk);
+       hlist_for_each_entry_safe(ri, node, tmp, head, hlist) {
+               if (ri->task == tk)
+                       recycle_rp_inst(ri, &empty_rp);
+       }
        spin_unlock_irqrestore(&kretprobe_lock, flags);
+
+       hlist_for_each_entry_safe(ri, node, tmp, &empty_rp, hlist) {
+               hlist_del(&ri->hlist);
+               kfree(ri);
+       }
 }
 
 static inline void free_rp_inst(struct kretprobe *rp)
@@ -514,7 +521,7 @@ static int __kprobes __register_kprobe(struct kprobe *p,
                                (ARCH_INACTIVE_KPROBE_COUNT + 1))
                register_page_fault_notifier(&kprobe_page_fault_nb);
 
-       arch_arm_kprobe(p);
+       arch_arm_kprobe(p);
 
 out:
        mutex_unlock(&kprobe_mutex);