diff options
| -rw-r--r-- | mm/swap_state.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/mm/swap_state.c b/mm/swap_state.c index fd2f21e1c60a..56a3cc4f1068 100644 --- a/mm/swap_state.c +++ b/mm/swap_state.c @@ -543,6 +543,13 @@ struct page *swap_cluster_readahead(swp_entry_t entry, gfp_t gfp_mask, if (!mask) goto skip; + /* Test swap type to make sure the dereference is safe */ + if (likely(si->flags & (SWP_BLKDEV | SWP_FS))) { + struct inode *inode = si->swap_file->f_mapping->host; + if (inode_read_congested(inode)) + goto skip; + } + do_poll = false; /* Read a page_cluster sized and aligned cluster around offset. */ start_offset = offset & ~mask; |