diff options
| author | Yu Zhao <[email protected]> | 2019-03-05 15:49:17 -0800 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2019-03-05 21:07:20 -0800 |
| commit | 5d3ee42f8f5fa5e7ccc8980878fe6e18a129b9ff (patch) | |
| tree | f2450c2442939937da7fcb79282b14c0c6e96f55 | |
| parent | afa00112893f4ca02777c3cf4f93011577af5ffc (diff) | |
mm/shmem: make find_get_pages_range() work for huge page
find_get_pages_range() and find_get_pages_range_tag() already correctly
increment reference count on head when seeing compound page, but they
may still use page index from tail. Page index from tail is always
zero, so these functions don't work on huge shmem. This hasn't been a
problem because, AFAIK, nobody calls these functions on (huge) shmem.
Fix them anyway just in case.
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Yu Zhao <[email protected]>
Reviewed-by: William Kucharski <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Cc: Amir Goldstein <[email protected]>
Cc: Dave Chinner <[email protected]>
Cc: "Darrick J . Wong" <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Souptick Joarder <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: "Kirill A . Shutemov" <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
| -rw-r--r-- | mm/filemap.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/filemap.c b/mm/filemap.c index ae0022f6106d..a41e01c472f3 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -1789,7 +1789,7 @@ unsigned find_get_pages_range(struct address_space *mapping, pgoff_t *start, pages[ret] = page; if (++ret == nr_pages) { - *start = page->index + 1; + *start = xas.xa_index + 1; goto out; } continue; @@ -1927,7 +1927,7 @@ unsigned find_get_pages_range_tag(struct address_space *mapping, pgoff_t *index, pages[ret] = page; if (++ret == nr_pages) { - *index = page->index + 1; + *index = xas.xa_index + 1; goto out; } continue; |