Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6

[cascardo/linux.git] / drivers / block / brd.c

diff --git a/drivers/block/brd.c b/drivers/block/brd.c
index 8536480..a196ef7 100644 (file)
--- a/drivers/block/brd.c
+++ b/drivers/block/brd.c
@@ -108,7 +108,7 @@ static struct page *brd_insert_page(struct brd_device *brd, sector_t sector)
 #ifndef CONFIG_BLK_DEV_XIP
        gfp_flags |= __GFP_HIGHMEM;
 #endif
-       page = alloc_page(GFP_NOIO | __GFP_HIGHMEM | __GFP_ZERO);
+       page = alloc_page(gfp_flags);
        if (!page)
                return NULL;
 
@@ -319,7 +319,7 @@ out:
 
 #ifdef CONFIG_BLK_DEV_XIP
 static int brd_direct_access (struct block_device *bdev, sector_t sector,
-                       unsigned long *data)
+                       void **kaddr, unsigned long *pfn)
 {
        struct brd_device *brd = bdev->bd_disk->private_data;
        struct page *page;
@@ -333,7 +333,8 @@ static int brd_direct_access (struct block_device *bdev, sector_t sector,
        page = brd_insert_page(brd, sector);
        if (!page)
                return -ENOMEM;
-       *data = (unsigned long)page_address(page);
+       *kaddr = page_address(page);
+       *pfn = page_to_pfn(page);
 
        return 0;
 }
@@ -386,10 +387,14 @@ static struct block_device_operations brd_fops = {
  */
 static int rd_nr;
 int rd_size = CONFIG_BLK_DEV_RAM_SIZE;
+static int max_part;
+static int part_shift;
 module_param(rd_nr, int, 0);
 MODULE_PARM_DESC(rd_nr, "Maximum number of brd devices");
 module_param(rd_size, int, 0);
 MODULE_PARM_DESC(rd_size, "Size of each RAM disk in kbytes.");
+module_param(max_part, int, 0);
+MODULE_PARM_DESC(max_part, "Maximum number of partitions per RAM disk");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS_BLOCKDEV_MAJOR(RAMDISK_MAJOR);
 
@@ -434,11 +439,11 @@ static struct brd_device *brd_alloc(int i)
        blk_queue_max_sectors(brd->brd_queue, 1024);
        blk_queue_bounce_limit(brd->brd_queue, BLK_BOUNCE_ANY);
 
-       disk = brd->brd_disk = alloc_disk(1);
+       disk = brd->brd_disk = alloc_disk(1 << part_shift);
        if (!disk)
                goto out_free_queue;
        disk->major             = RAMDISK_MAJOR;
-       disk->first_minor       = i;
+       disk->first_minor       = i << part_shift;
        disk->fops              = &brd_fops;
        disk->private_data      = brd;
        disk->queue             = brd->brd_queue;
@@ -522,7 +527,12 @@ static int __init brd_init(void)
         *     themselves and have kernel automatically instantiate actual
         *     device on-demand.
         */
-       if (rd_nr > 1UL << MINORBITS)
+
+       part_shift = 0;
+       if (max_part > 0)
+               part_shift = fls(max_part);
+
+       if (rd_nr > 1UL << (MINORBITS - part_shift))
                return -EINVAL;
 
        if (rd_nr) {
@@ -530,7 +540,7 @@ static int __init brd_init(void)
                range = rd_nr;
        } else {
                nr = CONFIG_BLK_DEV_RAM_COUNT;
-               range = 1UL << MINORBITS;
+               range = 1UL << (MINORBITS - part_shift);
        }
 
        if (register_blkdev(RAMDISK_MAJOR, "ramdisk"))
@@ -569,7 +579,7 @@ static void __exit brd_exit(void)
        unsigned long range;
        struct brd_device *brd, *next;
 
-       range = rd_nr ? rd_nr :  1UL << MINORBITS;
+       range = rd_nr ? rd_nr :  1UL << (MINORBITS - part_shift);
 
        list_for_each_entry_safe(brd, next, &brd_devices, brd_list)
                brd_del_one(brd);