spin_lock_nest_lock  754 arch/x86/xen/mmu.c 	spin_lock_nest_lock(ptl, &mm->page_table_lock);
spin_lock_nest_lock 2287 mm/mmap.c      		spin_lock_nest_lock(&anon_vma->lock, &mm->mmap_sem);
spin_lock_nest_lock 2317 mm/mmap.c      		spin_lock_nest_lock(&mapping->i_mmap_lock, &mm->mmap_sem);