diff options
Diffstat (limited to 'arch/powerpc/mm/book3s64/pgtable.c')
| -rw-r--r-- | arch/powerpc/mm/book3s64/pgtable.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/arch/powerpc/mm/book3s64/pgtable.c b/arch/powerpc/mm/book3s64/pgtable.c index 16bda049187a..01bc9663360d 100644 --- a/arch/powerpc/mm/book3s64/pgtable.c +++ b/arch/powerpc/mm/book3s64/pgtable.c @@ -1,10 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright 2015-2016, Aneesh Kumar K.V, IBM Corporation. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. */ #include <linux/sched.h> @@ -116,6 +112,9 @@ pmd_t pmdp_invalidate(struct vm_area_struct *vma, unsigned long address, /* * This ensures that generic code that rely on IRQ disabling * to prevent a parallel THP split work as expected. + * + * Marking the entry with _PAGE_INVALID && ~_PAGE_PRESENT requires + * a special case check in pmd_access_permitted. */ serialize_against_pte_lookup(vma->vm_mm); return __pmd(old_pmd); |