diff options
| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-06-14 09:14:43 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-06-14 09:14:43 +0200 |
| commit | 99289bf1a76c0aea6ac0f77335b8c9bdca16aac7 (patch) | |
| tree | 69b9484abfd6014154b925fdc0733438ffdf923f /mm/hugetlb.c | |
| parent | a69008475fc565cec5a760f1997f326773c84aac (diff) | |
| parent | 009c9aa5be652675a06d5211e1640e02bbb1c33d (diff) | |
Merge tag 'v5.13-rc6' into tty-next
We want the tty fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'mm/hugetlb.c')
| -rw-r--r-- | mm/hugetlb.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 95918f410c0f..5560b50876fb 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -1793,7 +1793,7 @@ retry: SetPageHWPoison(page); ClearPageHWPoison(head); } - remove_hugetlb_page(h, page, false); + remove_hugetlb_page(h, head, false); h->max_huge_pages--; spin_unlock_irq(&hugetlb_lock); update_and_free_page(h, head); @@ -4889,10 +4889,20 @@ int hugetlb_mcopy_atomic_pte(struct mm_struct *dst_mm, if (!page) goto out; } else if (!*pagep) { - ret = -ENOMEM; + /* If a page already exists, then it's UFFDIO_COPY for + * a non-missing case. Return -EEXIST. + */ + if (vm_shared && + hugetlbfs_pagecache_present(h, dst_vma, dst_addr)) { + ret = -EEXIST; + goto out; + } + page = alloc_huge_page(dst_vma, dst_addr, 0); - if (IS_ERR(page)) + if (IS_ERR(page)) { + ret = -ENOMEM; goto out; + } ret = copy_huge_page_from_user(page, (const void __user *) src_addr, |