On Mon, 27 Oct 2014, Ren, Qiaowei wrote: > On 2014-10-24, Thomas Gleixner wrote: > > On Sun, 12 Oct 2014, Qiaowei Ren wrote: > >> +int mpx_enable_management(struct task_struct *tsk) { > >> + struct mm_struct *mm = tsk->mm; > >> + void __user *bd_base = MPX_INVALID_BOUNDS_DIR; > > > > What's the point of initializing bd_base here. I had to look twice to > > figure out that it gets overwritten by task_get_bounds_dir() > > > > I just want to put task_get_bounds_dir() outside mm->mmap_sem holding. What you want is not interesting at all. What's interesting is what you do and what you send for review. Thanks, tglx