proc_mem_open
struct mm_struct *mm = proc_mem_open(inode, mode);
struct mm_struct *proc_mem_open(struct inode *inode, unsigned int mode);
priv->lock_ctx.mm = proc_mem_open(inode, PTRACE_MODE_READ);
mm = proc_mem_open(inode, PTRACE_MODE_READ);
priv->lock_ctx.mm = proc_mem_open(inode, PTRACE_MODE_READ);
priv->lock_ctx.mm = proc_mem_open(inode, PTRACE_MODE_READ);