Merge branch 'for-2.6.31' of git://git.kernel.dk/linux-2.6-block

* 'for-2.6.31' of git://git.kernel.dk/linux-2.6-block: (153 commits)
  block: add request clone interface (v2)
  floppy: fix hibernation
  ramdisk: remove long-deprecated "ramdisk=" boot-time parameter
  fs/bio.c: add missing __user annotation
  block: prevent possible io_context->refcount overflow
  Add serial number support for virtio_blk, V4a
  block: Add missing bounce_pfn stacking and fix comments
  Revert "block: Fix bounce limit setting in DM"
  cciss: decode unit attention in SCSI error handling code
  cciss: Remove no longer needed sendcmd reject processing code
  cciss: change SCSI error handling routines to work with interrupts enabled.
  cciss: separate error processing and command retrying code in sendcmd_withirq_core()
  cciss: factor out fix target status processing code from sendcmd functions
  cciss: simplify interface of sendcmd() and sendcmd_withirq()
  cciss: factor out core of sendcmd_withirq() for use by SCSI error handling code
  cciss: Use schedule_timeout_uninterruptible in SCSI error handling code
  block: needs to set the residual length of a bidi request
  Revert "block: implement blkdev_readpages"
  block: Fix bounce limit setting in DM
  Removed reference to non-existing file Documentation/PCI/PCI-DMA-mapping.txt
  ...

Manually fix conflicts with tracing updates in:
	block/blk-sysfs.c
	drivers/ide/ide-atapi.c
	drivers/ide/ide-cd.c
	drivers/ide/ide-floppy.c
	drivers/ide/ide-tape.c
	include/trace/events/block.h
	kernel/trace/blktrace.c

1 files changed, 11 insertions, 26 deletions

diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index d1815272c435..27a1be0cd4d4 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -603,7 +603,7 @@ static void dasd_profile_end(struct dasd_block *block,
 	if (dasd_profile_level != DASD_PROFILE_ON)
 		return;
 
-	sectors = req->nr_sectors;
+	sectors = blk_rq_sectors(req);
 	if (!cqr->buildclk || !cqr->startclk ||
 	    !cqr->stopclk || !cqr->endclk ||
 	    !sectors)
@@ -1614,15 +1614,6 @@ void dasd_block_clear_timer(struct dasd_block *block)
 }
 
 /*
- * posts the buffer_cache about a finalized request
- */
-static inline void dasd_end_request(struct request *req, int error)
-{
-	if (__blk_end_request(req, error, blk_rq_bytes(req)))
-		BUG();
-}
-
-/*
  * Process finished error recovery ccw.
  */
 static inline void __dasd_block_process_erp(struct dasd_block *block,
@@ -1665,18 +1656,14 @@ static void __dasd_process_request_queue(struct dasd_block *block)
 	if (basedev->state < DASD_STATE_READY)
 		return;
 	/* Now we try to fetch requests from the request queue */
-	while (!blk_queue_plugged(queue) &&
-	       elv_next_request(queue)) {
-
-		req = elv_next_request(queue);
-
+	while (!blk_queue_plugged(queue) && (req = blk_peek_request(queue))) {
 		if (basedev->features & DASD_FEATURE_READONLY &&
 		    rq_data_dir(req) == WRITE) {
 			DBF_DEV_EVENT(DBF_ERR, basedev,
 				      "Rejecting write request %p",
 				      req);
-			blkdev_dequeue_request(req);
-			dasd_end_request(req, -EIO);
+			blk_start_request(req);
+			__blk_end_request_all(req, -EIO);
 			continue;
 		}
 		cqr = basedev->discipline->build_cp(basedev, block, req);
@@ -1704,8 +1691,8 @@ static void __dasd_process_request_queue(struct dasd_block *block)
 				      "CCW creation failed (rc=%ld) "
 				      "on request %p",
 				      PTR_ERR(cqr), req);
-			blkdev_dequeue_request(req);
-			dasd_end_request(req, -EIO);
+			blk_start_request(req);
+			__blk_end_request_all(req, -EIO);
 			continue;
 		}
 		/*
@@ -1714,7 +1701,7 @@ static void __dasd_process_request_queue(struct dasd_block *block)
 		 */
 		cqr->callback_data = (void *) req;
 		cqr->status = DASD_CQR_FILLED;
-		blkdev_dequeue_request(req);
+		blk_start_request(req);
 		list_add_tail(&cqr->blocklist, &block->ccw_queue);
 		dasd_profile_start(block, cqr, req);
 	}
@@ -1731,7 +1718,7 @@ static void __dasd_cleanup_cqr(struct dasd_ccw_req *cqr)
 	status = cqr->block->base->discipline->free_cp(cqr, req);
 	if (status <= 0)
 		error = status ? status : -EIO;
-	dasd_end_request(req, error);
+	__blk_end_request_all(req, error);
 }
 
 /*
@@ -2003,7 +1990,7 @@ static void dasd_setup_queue(struct dasd_block *block)
 {
 	int max;
 
-	blk_queue_hardsect_size(block->request_queue, block->bp_block);
+	blk_queue_logical_block_size(block->request_queue, block->bp_block);
 	max = block->base->discipline->max_blocks << block->s2b_shift;
 	blk_queue_max_sectors(block->request_queue, max);
 	blk_queue_max_phys_segments(block->request_queue, -1L);
@@ -2038,10 +2025,8 @@ static void dasd_flush_request_queue(struct dasd_block *block)
 		return;
 
 	spin_lock_irq(&block->request_queue_lock);
-	while ((req = elv_next_request(block->request_queue))) {
-		blkdev_dequeue_request(req);
-		dasd_end_request(req, -EIO);
-	}
+	while ((req = blk_fetch_request(block->request_queue)))
+		__blk_end_request_all(req, -EIO);
 	spin_unlock_irq(&block->request_queue_lock);
 }