X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fblock%2Frd.c;h=485aa87e9bcd6069b7c17a72d2fe946a95100db5;hb=refs%2Fheads%2Fvserver;hp=80848c2a7bbedc91d34d00f82554d59f4ff3a698;hpb=6a77f38946aaee1cd85eeec6cf4229b204c15071;p=linux-2.6.git

diff --git a/drivers/block/rd.c b/drivers/block/rd.c
index 80848c2a7..485aa87e9 100644
--- a/drivers/block/rd.c
+++ b/drivers/block/rd.c
@@ -42,7 +42,6 @@
  * and set blk_size for -ENOSPC,     Werner Fink <werner@suse.de>, Apr '99
  */
 
-#include <linux/config.h>
 #include <linux/string.h>
 #include <linux/slab.h>
 #include <asm/atomic.h>
@@ -50,7 +49,6 @@
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/init.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/pagemap.h>
 #include <linux/blkdev.h>
 #include <linux/genhd.h>
@@ -86,7 +84,7 @@ int rd_size = CONFIG_BLK_DEV_RAM_SIZE;		/* Size of the RAM disks */
  * behaviour. The default is still BLOCK_SIZE (needed by rd_load_image that
  * supposes the filesystem in the image uses a BLOCK_SIZE blocksize).
  */
-int rd_blocksize = BLOCK_SIZE;			/* blocksize of the RAM disks */
+static int rd_blocksize = CONFIG_BLK_DEV_RAM_BLOCKSIZE;
 
 /*
  * Copyright (C) 2000 Linus Torvalds.
@@ -154,7 +152,7 @@ static int ramdisk_commit_write(struct file *file, struct page *page,
 
 /*
  * ->writepage to the the blockdev's mapping has to redirty the page so that the
- * VM doesn't go and steal it.  We return WRITEPAGE_ACTIVATE so that the VM
+ * VM doesn't go and steal it.  We return AOP_WRITEPAGE_ACTIVATE so that the VM
  * won't try to (pointlessly) write the page again for a while.
  *
  * Really, these pages should not be on the LRU at all.
@@ -165,7 +163,7 @@ static int ramdisk_writepage(struct page *page, struct writeback_control *wbc)
 		make_page_uptodate(page);
 	SetPageDirty(page);
 	if (wbc->for_reclaim)
-		return WRITEPAGE_ACTIVATE;
+		return AOP_WRITEPAGE_ACTIVATE;
 	unlock_page(page);
 	return 0;
 }
@@ -186,11 +184,12 @@ static int ramdisk_writepages(struct address_space *mapping,
  */
 static int ramdisk_set_page_dirty(struct page *page)
 {
-	SetPageDirty(page);
+	if (!TestSetPageDirty(page))
+		return 1;
 	return 0;
 }
 
-static struct address_space_operations ramdisk_aops = {
+static const struct address_space_operations ramdisk_aops = {
 	.readpage	= ramdisk_readpage,
 	.prepare_write	= ramdisk_prepare_write,
 	.commit_write	= ramdisk_commit_write,
@@ -310,12 +309,12 @@ static int rd_ioctl(struct inode *inode, struct file *file,
 	 * cache
 	 */
 	error = -EBUSY;
-	down(&bdev->bd_sem);
+	mutex_lock(&bdev->bd_mutex);
 	if (bdev->bd_openers <= 2) {
 		truncate_inode_pages(bdev->bd_inode->i_mapping, 0);
 		error = 0;
 	}
-	up(&bdev->bd_sem);
+	mutex_unlock(&bdev->bd_mutex);
 	return error;
 }
 
@@ -325,7 +324,7 @@ static int rd_ioctl(struct inode *inode, struct file *file,
  */
 static struct backing_dev_info rd_backing_dev_info = {
 	.ra_pages	= 0,	/* No readahead */
-	.memory_backed	= 1,	/* Does not contribute to dirty memory */
+	.capabilities	= BDI_CAP_NO_ACCT_DIRTY | BDI_CAP_NO_WRITEBACK | BDI_CAP_MAP_COPY,
 	.unplug_io_fn	= default_unplug_io_fn,
 };
 
@@ -336,7 +335,7 @@ static struct backing_dev_info rd_backing_dev_info = {
  */
 static struct backing_dev_info rd_file_backing_dev_info = {
 	.ra_pages	= 0,	/* No readahead */
-	.memory_backed	= 0,	/* Does contribute to dirty memory */
+	.capabilities	= BDI_CAP_MAP_COPY,	/* Does contribute to dirty memory */
 	.unplug_io_fn	= default_unplug_io_fn,
 };
 
@@ -348,7 +347,7 @@ static int rd_open(struct inode *inode, struct file *filp)
 		struct block_device *bdev = inode->i_bdev;
 		struct address_space *mapping;
 		unsigned bsize;
-		int gfp_mask;
+		gfp_t gfp_mask;
 
 		inode = igrab(bdev->bd_inode);
 		rd_bdev[unit] = bdev;
@@ -411,7 +410,6 @@ static void __exit rd_cleanup(void)
 		put_disk(rd_disks[i]);
 		blk_cleanup_queue(rd_queue[i]);
 	}
-	devfs_remove("rd");
 	unregister_blkdev(RAMDISK_MAJOR, "ramdisk");
 }
 
@@ -434,6 +432,12 @@ static int __init rd_init(void)
 		rd_disks[i] = alloc_disk(1);
 		if (!rd_disks[i])
 			goto out;
+
+		rd_queue[i] = blk_alloc_queue(GFP_KERNEL);
+		if (!rd_queue[i]) {
+			put_disk(rd_disks[i]);
+			goto out;
+		}
 	}
 
 	if (register_blkdev(RAMDISK_MAJOR, "ramdisk")) {
@@ -441,15 +445,9 @@ static int __init rd_init(void)
 		goto out;
 	}
 
-	devfs_mk_dir("rd");
-
 	for (i = 0; i < CONFIG_BLK_DEV_RAM_COUNT; i++) {
 		struct gendisk *disk = rd_disks[i];
 
-		rd_queue[i] = blk_alloc_queue(GFP_KERNEL);
-		if (!rd_queue[i])
-			goto out_queue;
-
 		blk_queue_make_request(rd_queue[i], &rd_make_request);
 		blk_queue_hardsect_size(rd_queue[i], rd_blocksize);
 
@@ -460,7 +458,6 @@ static int __init rd_init(void)
 		disk->queue = rd_queue[i];
 		disk->flags |= GENHD_FL_SUPPRESS_PARTITION_INFO;
 		sprintf(disk->disk_name, "ram%d", i);
-		sprintf(disk->devfs_name, "rd/%d", i);
 		set_capacity(disk, rd_size * 2);
 		add_disk(rd_disks[i]);
 	}
@@ -471,8 +468,6 @@ static int __init rd_init(void)
 		CONFIG_BLK_DEV_RAM_COUNT, rd_size, rd_blocksize);
 
 	return 0;
-out_queue:
-	unregister_blkdev(RAMDISK_MAJOR, "ramdisk");
 out:
 	while (i--) {
 		put_disk(rd_disks[i]);