diff options
Diffstat (limited to 'mm/filemap.c')
| -rw-r--r-- | mm/filemap.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/mm/filemap.c b/mm/filemap.c index b7c039669020..92d4e0a6c012 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -1939,6 +1939,8 @@ find_page: page = find_get_page(mapping, index); if (!page) { + if (iocb->ki_flags & IOCB_NOWAIT) + goto would_block; page_cache_sync_readahead(mapping, ra, filp, index, last_index - index); @@ -1952,6 +1954,11 @@ find_page: index, last_index - index); } if (!PageUptodate(page)) { + if (iocb->ki_flags & IOCB_NOWAIT) { + put_page(page); + goto would_block; + } + /* * See comment in do_read_cache_page on why * wait_on_page_locked is used to avoid unnecessarily @@ -2133,6 +2140,8 @@ no_cached_page: goto readpage; } +would_block: + error = -EAGAIN; out: ra->prev_pos = prev_index; ra->prev_pos <<= PAGE_SHIFT; |