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| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2021-07-04 23:05:31 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2021-07-04 23:05:31 -0700 |
| commit | 818b26588994d9d95743fca0a427f08ec6c1c41d (patch) | |
| tree | 870d9abed0e43b82257350a93e6517816815cd6c /mm/filemap.c | |
| parent | 45a4b68354ffccbc9ca71027bd34754ca24f5183 (diff) | |
| parent | f8f84af5da9ee04ef1d271528656dac42a090d00 (diff) | |
| download | net-818b26588994d9d95743fca0a427f08ec6c1c41d.tar.gz | |
Merge branch 'next' into for-linus
Prepare input updates for 5.14 merge window.
Diffstat (limited to 'mm/filemap.c')
| -rw-r--r-- | mm/filemap.c | 31 |
1 files changed, 19 insertions, 12 deletions
diff --git a/mm/filemap.c b/mm/filemap.c index 43700480d897d4..6ce832dc59e738 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -1969,8 +1969,14 @@ unlock: put: put_page(page); next: - if (!xa_is_value(page) && PageTransHuge(page)) - xas_set(&xas, page->index + thp_nr_pages(page)); + if (!xa_is_value(page) && PageTransHuge(page)) { + unsigned int nr_pages = thp_nr_pages(page); + + /* Final THP may cross MAX_LFS_FILESIZE on 32-bit */ + xas_set(&xas, page->index + nr_pages); + if (xas.xa_index < nr_pages) + break; + } } rcu_read_unlock(); @@ -2672,7 +2678,7 @@ loff_t mapping_seek_hole_data(struct address_space *mapping, loff_t start, loff_t end, int whence) { XA_STATE(xas, &mapping->i_pages, start >> PAGE_SHIFT); - pgoff_t max = (end - 1) / PAGE_SIZE; + pgoff_t max = (end - 1) >> PAGE_SHIFT; bool seek_data = (whence == SEEK_DATA); struct page *page; @@ -2681,7 +2687,8 @@ loff_t mapping_seek_hole_data(struct address_space *mapping, loff_t start, rcu_read_lock(); while ((page = find_get_entry(&xas, max, XA_PRESENT))) { - loff_t pos = xas.xa_index * PAGE_SIZE; + loff_t pos = (u64)xas.xa_index << PAGE_SHIFT; + unsigned int seek_size; if (start < pos) { if (!seek_data) @@ -2689,25 +2696,25 @@ loff_t mapping_seek_hole_data(struct address_space *mapping, loff_t start, start = pos; } - pos += seek_page_size(&xas, page); + seek_size = seek_page_size(&xas, page); + pos = round_up(pos + 1, seek_size); start = page_seek_hole_data(&xas, mapping, page, start, pos, seek_data); if (start < pos) goto unlock; + if (start >= end) + break; + if (seek_size > PAGE_SIZE) + xas_set(&xas, pos >> PAGE_SHIFT); if (!xa_is_value(page)) put_page(page); } - rcu_read_unlock(); - if (seek_data) - return -ENXIO; - goto out; - + start = -ENXIO; unlock: rcu_read_unlock(); - if (!xa_is_value(page)) + if (page && !xa_is_value(page)) put_page(page); -out: if (start > end) return end; return start; |