powerpc/kexec: Fix build failure on 32-bit SMP

[pandora-kernel.git] / mm / readahead.c

diff --git a/mm/readahead.c b/mm/readahead.c
index 77506a2..2c0cc48 100644 (file)
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -109,9 +109,12 @@ EXPORT_SYMBOL(read_cache_pages);
 static int read_pages(struct address_space *mapping, struct file *filp,
                struct list_head *pages, unsigned nr_pages)
 {
+       struct blk_plug plug;
        unsigned page_idx;
        int ret;
 
+       blk_start_plug(&plug);
+
        if (mapping->a_ops->readpages) {
                ret = mapping->a_ops->readpages(filp, mapping, pages, nr_pages);
                /* Clean up the remaining pages */
@@ -129,7 +132,10 @@ static int read_pages(struct address_space *mapping, struct file *filp,
                page_cache_release(page);
        }
        ret = 0;
+
 out:
+       blk_finish_plug(&plug);
+
        return ret;
 }
 
@@ -554,17 +560,5 @@ page_cache_async_readahead(struct address_space *mapping,
 
        /* do read-ahead */
        ondemand_readahead(mapping, ra, filp, true, offset, req_size);
-
-#ifdef CONFIG_BLOCK
-       /*
-        * Normally the current page is !uptodate and lock_page() will be
-        * immediately called to implicitly unplug the device. However this
-        * is not always true for RAID conifgurations, where data arrives
-        * not strictly in their submission order. In this case we need to
-        * explicitly kick off the IO.
-        */
-       if (PageUptodate(page))
-               blk_run_backing_dev(mapping->backing_dev_info, NULL);
-#endif
 }
 EXPORT_SYMBOL_GPL(page_cache_async_readahead);