[CLEAN] remove find_task_by_path()

diff --git a/driver/us_proc_inst.c b/driver/us_proc_inst.c
index 79ca847..e953568 100644 (file)
--- a/driver/us_proc_inst.c
+++ b/driver/us_proc_inst.c
@@ -81,63 +81,6 @@ int check_vma(struct vm_area_struct *vma)
                        !(vma->vm_flags & (VM_READ | VM_MAYREAD)));
 }
 
-static int find_task_by_path (const char *path, struct task_struct **p_task, struct list_head *tids)
-{
-       int found = 0;
-       struct task_struct *task;
-       struct vm_area_struct *vma;
-       struct mm_struct *mm;
-       struct dentry *dentry = dentry_by_path(path);
-
-       *p_task = NULL;
-
-       /* find corresponding dir entry, this is also check for valid path */
-       // TODO: test - try to instrument process with non-existing path
-       // TODO: test - try to instrument process  with existing path and delete file just after start
-       if (dentry == NULL) {
-               return -EINVAL;
-       }
-
-       rcu_read_lock();
-       for_each_process (task) {
-
-               if  ( 0 != inst_pid && ( inst_pid != task->pid ) )
-                       continue;
-
-               mm = get_task_mm(task);
-               if (!mm)
-                       continue;
-               vma = mm->mmap;
-               while (vma) {
-                       if (check_vma(vma)) {
-                               if (vma->vm_file->f_dentry == dentry) {
-                                       if (!*p_task) {
-                                               *p_task = task;
-                                               get_task_struct (task);
-                                       }
-                                               //break;
-                               }
-                       }
-                       vma = vma->vm_next;
-               }
-               // only decrement usage count on mm since we cannot sleep here
-               atomic_dec(&mm->mm_users);
-               if (found)
-                       break;
-       }
-       rcu_read_unlock();
-
-       if (*p_task) {
-               DPRINTF ("found pid %d for %s.", (*p_task)->pid, path);
-               *p_task = (*p_task)->group_leader;
-               gl_nNotifyTgid = (*p_task)->tgid;
-       } else {
-               DPRINTF ("pid for %s not found!", path);
-       }
-
-       return 0;
-}
-
 int install_otg_ip(unsigned long addr,
                        kprobe_pre_entry_handler_t pre_handler,
                        unsigned long jp_handler,