Merge branch 'for-linus' of git://linux-nfs.org/~bfields/linux

[linux-2.6-omap-h63xx.git] / drivers / block / rd.c

diff --git a/drivers/block/rd.c b/drivers/block/rd.c
index 65150b548f3a5c53669a106186ec586eb93eeb94..82f4eecc8699d19e42e899b043e2c45842cdbcc1 100644 (file)
--- a/drivers/block/rd.c
+++ b/drivers/block/rd.c
@@ -189,6 +189,18 @@ static int ramdisk_set_page_dirty(struct page *page)
        return 0;
 }
 
+/*
+ * releasepage is called by pagevec_strip/try_to_release_page if
+ * buffers_heads_over_limit is true. Without a releasepage function
+ * try_to_free_buffers is called instead. That can unset the dirty
+ * bit of our ram disk pages, which will be eventually freed, even
+ * if the page is still in use.
+ */
+static int ramdisk_releasepage(struct page *page, gfp_t dummy)
+{
+       return 0;
+}
+
 static const struct address_space_operations ramdisk_aops = {
        .readpage       = ramdisk_readpage,
        .prepare_write  = ramdisk_prepare_write,
@@ -196,6 +208,7 @@ static const struct address_space_operations ramdisk_aops = {
        .writepage      = ramdisk_writepage,
        .set_page_dirty = ramdisk_set_page_dirty,
        .writepages     = ramdisk_writepages,
+       .releasepage    = ramdisk_releasepage,
 };
 
 static int rd_blkdev_pagecache_IO(int rw, struct bio_vec *vec, sector_t sector,
@@ -287,10 +300,10 @@ static int rd_make_request(struct request_queue *q, struct bio *bio)
        if (ret)
                goto fail;
 
-       bio_endio(bio, bio->bi_size, 0);
+       bio_endio(bio, 0);
        return 0;
 fail:
-       bio_io_error(bio, bio->bi_size);
+       bio_io_error(bio);
        return 0;
 } 
 
@@ -365,7 +378,7 @@ static int rd_open(struct inode *inode, struct file *filp)
                /*
                 * Deep badness.  rd_blkdev_pagecache_IO() needs to allocate
                 * pagecache pages within a request_fn.  We cannot recur back
-                * into the filesytem which is mounted atop the ramdisk, because
+                * into the filesystem which is mounted atop the ramdisk, because
                 * that would deadlock on fs locks.  And we really don't want
                 * to reenter rd_blkdev_pagecache_IO when we're already within
                 * that function.
@@ -411,6 +424,9 @@ static void __exit rd_cleanup(void)
                blk_cleanup_queue(rd_queue[i]);
        }
        unregister_blkdev(RAMDISK_MAJOR, "ramdisk");
+
+       bdi_destroy(&rd_file_backing_dev_info);
+       bdi_destroy(&rd_backing_dev_info);
 }
 
 /*
@@ -419,7 +435,19 @@ static void __exit rd_cleanup(void)
 static int __init rd_init(void)
 {
        int i;
-       int err = -ENOMEM;
+       int err;
+
+       err = bdi_init(&rd_backing_dev_info);
+       if (err)
+               goto out2;
+
+       err = bdi_init(&rd_file_backing_dev_info);
+       if (err) {
+               bdi_destroy(&rd_backing_dev_info);
+               goto out2;
+       }
+
+       err = -ENOMEM;
 
        if (rd_blocksize > PAGE_SIZE || rd_blocksize < 512 ||
                        (rd_blocksize & (rd_blocksize-1))) {
@@ -473,6 +501,9 @@ out:
                put_disk(rd_disks[i]);
                blk_cleanup_queue(rd_queue[i]);
        }
+       bdi_destroy(&rd_backing_dev_info);
+       bdi_destroy(&rd_file_backing_dev_info);
+out2:
        return err;
 }
 
@@ -486,17 +517,12 @@ static int __init ramdisk_size(char *str)
        rd_size = simple_strtol(str,NULL,0);
        return 1;
 }
-static int __init ramdisk_size2(char *str)     /* kludge */
-{
-       return ramdisk_size(str);
-}
 static int __init ramdisk_blocksize(char *str)
 {
        rd_blocksize = simple_strtol(str,NULL,0);
        return 1;
 }
-__setup("ramdisk=", ramdisk_size);
-__setup("ramdisk_size=", ramdisk_size2);
+__setup("ramdisk_size=", ramdisk_size);
 __setup("ramdisk_blocksize=", ramdisk_blocksize);
 #endif