diff options
Diffstat (limited to 'block/blk-settings.c')
-rw-r--r-- | block/blk-settings.c | 39 |
1 files changed, 3 insertions, 36 deletions
diff --git a/block/blk-settings.c b/block/blk-settings.c index c8eda2e7b91e..14397b4c4b53 100644 --- a/block/blk-settings.c +++ b/block/blk-settings.c @@ -87,42 +87,6 @@ void blk_set_stacking_limits(struct queue_limits *lim) EXPORT_SYMBOL(blk_set_stacking_limits); /** - * blk_queue_make_request - define an alternate make_request function for a device - * @q: the request queue for the device to be affected - * @mfn: the alternate make_request function - * - * Description: - * The normal way for &struct bios to be passed to a device - * driver is for them to be collected into requests on a request - * queue, and then to allow the device driver to select requests - * off that queue when it is ready. This works well for many block - * devices. However some block devices (typically virtual devices - * such as md or lvm) do not benefit from the processing on the - * request queue, and are served best by having the requests passed - * directly to them. This can be achieved by providing a function - * to blk_queue_make_request(). - * - * Caveat: - * The driver that does this *must* be able to deal appropriately - * with buffers in "highmemory". This can be accomplished by either calling - * kmap_atomic() to get a temporary kernel mapping, or by calling - * blk_queue_bounce() to create a buffer in normal memory. - **/ -void blk_queue_make_request(struct request_queue *q, make_request_fn *mfn) -{ - /* - * set defaults - */ - q->nr_requests = BLKDEV_MAX_RQ; - - q->make_request_fn = mfn; - blk_queue_dma_alignment(q, 511); - - blk_set_default_limits(&q->limits); -} -EXPORT_SYMBOL(blk_queue_make_request); - -/** * blk_queue_bounce_limit - set bounce buffer limit for queue * @q: the request queue for the device * @max_addr: the maximum address the device can handle @@ -664,6 +628,9 @@ void disk_stack_limits(struct gendisk *disk, struct block_device *bdev, printk(KERN_NOTICE "%s: Warning: Device %s is misaligned\n", top, bottom); } + + t->backing_dev_info->io_pages = + t->limits.max_sectors >> (PAGE_SHIFT - 9); } EXPORT_SYMBOL(disk_stack_limits); |