mm/migrate: Add filemap_migrate_folio()

[linux-2.6-microblaze.git] / mm / readahead.c

diff --git a/mm/readahead.c b/mm/readahead.c
index 415c39d..fdcd28c 100644 (file)
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -164,12 +164,14 @@ static void read_pages(struct readahead_control *rac)
                while ((folio = readahead_folio(rac)) != NULL) {
                        unsigned long nr = folio_nr_pages(folio);
 
+                       folio_get(folio);
                        rac->ra->size -= nr;
                        if (rac->ra->async_size >= nr) {
                                rac->ra->async_size -= nr;
                                filemap_remove_folio(folio);
                        }
                        folio_unlock(folio);
+                       folio_put(folio);
                }
        } else {
                while ((folio = readahead_folio(rac)) != NULL)
@@ -508,6 +510,7 @@ void page_cache_ra_order(struct readahead_control *ractl,
                        new_order--;
        }
 
+       filemap_invalidate_lock_shared(mapping);
        while (index <= limit) {
                unsigned int order = new_order;
 
@@ -534,6 +537,7 @@ void page_cache_ra_order(struct readahead_control *ractl,
        }
 
        read_pages(ractl);
+       filemap_invalidate_unlock_shared(mapping);
 
        /*
         * If there were already pages in the page cache, then we may have