29 	struct mm_struct *mm = current->mm;  in mpx_mmap()  local
37 	down_write(&mm->mmap_sem);  in mpx_mmap()
40 	if (mm->map_count > sysctl_max_map_count) {  in mpx_mmap()
55 			mm->def_flags | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC;  in mpx_mmap()
64 	vma = find_vma(mm, ret);  in mpx_mmap()
71 		up_write(&mm->mmap_sem);  in mpx_mmap()
77 	up_write(&mm->mmap_sem);  in mpx_mmap()
366 	struct mm_struct *mm = tsk->mm;  in mpx_enable_management()  local
380 	down_write(&mm->mmap_sem);  in mpx_enable_management()
381 	mm->bd_addr = bd_base;  in mpx_enable_management()
382 	if (mm->bd_addr == MPX_INVALID_BOUNDS_DIR)  in mpx_enable_management()
385 	up_write(&mm->mmap_sem);  in mpx_enable_management()
391 	struct mm_struct *mm = current->mm;  in mpx_disable_management()  local
396 	down_write(&mm->mmap_sem);  in mpx_disable_management()
397 	mm->bd_addr = MPX_INVALID_BOUNDS_DIR;  in mpx_disable_management()
398 	up_write(&mm->mmap_sem);  in mpx_disable_management()
517 	if (!kernel_managing_mpx_tables(current->mm))  in mpx_handle_bd_fault()
541 	gup_ret = get_user_pages(current, current->mm, (unsigned long)addr,  in mpx_resolve_fault()
561 static int get_bt_addr(struct mm_struct *mm,  in get_bt_addr()  argument
616 static int zap_bt_entries(struct mm_struct *mm,  in zap_bt_entries()  argument
628 	vma = find_vma(mm, start);  in zap_bt_entries()
659 static int unmap_single_bt(struct mm_struct *mm,  in unmap_single_bt()  argument
711 	return do_munmap(mm, bt_addr, MPX_BT_SIZE_BYTES);  in unmap_single_bt()
720 static int unmap_shared_bt(struct mm_struct *mm,  in unmap_shared_bt()  argument
727 	ret = get_bt_addr(mm, bd_entry, &bt_addr);  in unmap_shared_bt()
737 		ret = zap_bt_entries(mm, bt_addr,  in unmap_shared_bt()
741 		ret = zap_bt_entries(mm, bt_addr,  in unmap_shared_bt()
745 		ret = zap_bt_entries(mm, bt_addr, bt_addr,  in unmap_shared_bt()
748 		ret = unmap_single_bt(mm, bd_entry, bt_addr);  in unmap_shared_bt()
759 static int unmap_edge_bts(struct mm_struct *mm,  in unmap_edge_bts()  argument
767 	bde_start = mm->bd_addr + MPX_GET_BD_ENTRY_OFFSET(start);  in unmap_edge_bts()
768 	bde_end = mm->bd_addr + MPX_GET_BD_ENTRY_OFFSET(end-1);  in unmap_edge_bts()
779 	next = find_vma_prev(mm, start, &prev);  in unmap_edge_bts()
780 	if (prev && (mm->bd_addr + MPX_GET_BD_ENTRY_OFFSET(prev->vm_end-1))  in unmap_edge_bts()
783 	if (next && (mm->bd_addr + MPX_GET_BD_ENTRY_OFFSET(next->vm_start))  in unmap_edge_bts()
797 		return unmap_shared_bt(mm, bde_start, start, end,  in unmap_edge_bts()
806 	ret = unmap_shared_bt(mm, bde_start, start, end, prev_shared, false);  in unmap_edge_bts()
809 	ret = unmap_shared_bt(mm, bde_end, start, end, false, next_shared);  in unmap_edge_bts()
816 static int mpx_unmap_tables(struct mm_struct *mm,  in mpx_unmap_tables()  argument
830 	ret = unmap_edge_bts(mm, start, end);  in mpx_unmap_tables()
848 	bde_start = mm->bd_addr + MPX_GET_BD_ENTRY_OFFSET(start);  in mpx_unmap_tables()
849 	bde_end = mm->bd_addr + MPX_GET_BD_ENTRY_OFFSET(end-1);  in mpx_unmap_tables()
851 		ret = get_bt_addr(mm, bd_entry, &bt_addr);  in mpx_unmap_tables()
870 		ret = unmap_single_bt(mm, bd_entry, bt_addr);  in mpx_unmap_tables()
886 void mpx_notify_unmap(struct mm_struct *mm, struct vm_area_struct *vma,  in mpx_notify_unmap()  argument
895 	if (!kernel_managing_mpx_tables(current->mm))  in mpx_notify_unmap()
913 	ret = mpx_unmap_tables(mm, start, end);  in mpx_notify_unmap()