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Commit 24e1c13c authored by Linus Torvalds's avatar Linus Torvalds
Browse files

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

* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
  block: kill swap_io_context()
  as-iosched: fix inconsistent ioc->lock context
  ide-cd: fix leftover data BUG
  block: make elevator lib checkpatch compliant
  cfq-iosched: make checkpatch compliant
  block: make core bits checkpatch compliant
  block: new end request handling interface should take unsigned byte counts
  unexport add_disk_randomness
  block/sunvdc.c:print_version() must be __devinit
  splice: always updated atime in direct splice
parents 31fa5d28 3bc217ff

block/as-iosched.c

+6 −18
Original line number Diff line number Diff line
@@ -170,11 +170,11 @@ static void free_as_io_context(struct as_io_context *aic) 


static void as_trim(struct io_context *ioc)

{

	spin_lock(&ioc->lock);

	spin_lock_irq(&ioc->lock);

	if (ioc->aic)

		free_as_io_context(ioc->aic);

	ioc->aic = NULL;

	spin_unlock(&ioc->lock);

	spin_unlock_irq(&ioc->lock);

}



/* Called when the task exits */
@@ -235,10 +235,12 @@ static void as_put_io_context(struct request *rq) 
	aic = RQ_IOC(rq)->aic;



	if (rq_is_sync(rq) && aic) {

		spin_lock(&aic->lock);

		unsigned long flags;



		spin_lock_irqsave(&aic->lock, flags);

		set_bit(AS_TASK_IORUNNING, &aic->state);

		aic->last_end_request = jiffies;

		spin_unlock(&aic->lock);

		spin_unlock_irqrestore(&aic->lock, flags);

	}



	put_io_context(RQ_IOC(rq));
@@ -1266,22 +1268,8 @@ static void as_merged_requests(struct request_queue *q, struct request *req, 
	 */

	if (!list_empty(&req->queuelist) && !list_empty(&next->queuelist)) {

		if (time_before(rq_fifo_time(next), rq_fifo_time(req))) {

			struct io_context *rioc = RQ_IOC(req);

			struct io_context *nioc = RQ_IOC(next);



			list_move(&req->queuelist, &next->queuelist);

			rq_set_fifo_time(req, rq_fifo_time(next));

			/*

			 * Don't copy here but swap, because when anext is

			 * removed below, it must contain the unused context

			 */

			if (rioc != nioc) {

				double_spin_lock(&rioc->lock, &nioc->lock,

								rioc < nioc);

				swap_io_context(&rioc, &nioc);

				double_spin_unlock(&rioc->lock, &nioc->lock,

								rioc < nioc);

			}

		}

	}

block/blk-barrier.c

+2 −3
Original line number Diff line number Diff line
@@ -26,7 +26,8 @@ int blk_queue_ordered(struct request_queue *q, unsigned ordered, 
{

	if (ordered & (QUEUE_ORDERED_PREFLUSH | QUEUE_ORDERED_POSTFLUSH) &&

	    prepare_flush_fn == NULL) {

		printk(KERN_ERR "blk_queue_ordered: prepare_flush_fn required\n");

		printk(KERN_ERR "%s: prepare_flush_fn required\n",

								__FUNCTION__);

		return -EINVAL;

	}
@@ -47,7 +48,6 @@ int blk_queue_ordered(struct request_queue *q, unsigned ordered, 


	return 0;

}



EXPORT_SYMBOL(blk_queue_ordered);



/*
@@ -315,5 +315,4 @@ int blkdev_issue_flush(struct block_device *bdev, sector_t *error_sector) 
	bio_put(bio);

	return ret;

}



EXPORT_SYMBOL(blkdev_issue_flush);

block/blk-core.c

+81 −88
Original line number Diff line number Diff line
@@ -3,7 +3,8 @@ 
 * Copyright (C) 1994,      Karl Keyte: Added support for disk statistics

 * Elevator latency, (C) 2000  Andrea Arcangeli <andrea@suse.de> SuSE

 * Queue request tables / lock, selectable elevator, Jens Axboe <axboe@suse.de>

 * kernel-doc documentation started by NeilBrown <neilb@cse.unsw.edu.au> -  July2000

 * kernel-doc documentation started by NeilBrown <neilb@cse.unsw.edu.au>

 *	-  July2000

 * bio rewrite, highmem i/o, etc, Jens Axboe <axboe@suse.de> - may 2001

 */
@@ -42,7 +43,7 @@ struct kmem_cache *request_cachep; 
/*

 * For queue allocation

 */

struct kmem_cache *blk_requestq_cachep = NULL;

struct kmem_cache *blk_requestq_cachep;



/*

 * Controlling structure to kblockd
@@ -137,7 +138,7 @@ static void req_bio_endio(struct request *rq, struct bio *bio, 
			error = -EIO;



		if (unlikely(nbytes > bio->bi_size)) {

			printk("%s: want %u bytes done, only %u left\n",

			printk(KERN_ERR "%s: want %u bytes done, %u left\n",

			       __FUNCTION__, nbytes, bio->bi_size);

			nbytes = bio->bi_size;

		}
@@ -161,23 +162,26 @@ void blk_dump_rq_flags(struct request *rq, char *msg) 
{

	int bit;



	printk("%s: dev %s: type=%x, flags=%x\n", msg,

	printk(KERN_INFO "%s: dev %s: type=%x, flags=%x\n", msg,

		rq->rq_disk ? rq->rq_disk->disk_name : "?", rq->cmd_type,

		rq->cmd_flags);



	printk("\nsector %llu, nr/cnr %lu/%u\n", (unsigned long long)rq->sector,

	printk(KERN_INFO "  sector %llu, nr/cnr %lu/%u\n",

						(unsigned long long)rq->sector,

						rq->nr_sectors,

						rq->current_nr_sectors);

	printk("bio %p, biotail %p, buffer %p, data %p, len %u\n", rq->bio, rq->biotail, rq->buffer, rq->data, rq->data_len);

	printk(KERN_INFO "  bio %p, biotail %p, buffer %p, data %p, len %u\n",

						rq->bio, rq->biotail,

						rq->buffer, rq->data,

						rq->data_len);



	if (blk_pc_request(rq)) {

		printk("cdb: ");

		printk(KERN_INFO "  cdb: ");

		for (bit = 0; bit < sizeof(rq->cmd); bit++)

			printk("%02x ", rq->cmd[bit]);

		printk("\n");

	}

}



EXPORT_SYMBOL(blk_dump_rq_flags);



/*
@@ -204,7 +208,6 @@ void blk_plug_device(struct request_queue *q) 
		blk_add_trace_generic(q, NULL, 0, BLK_TA_PLUG);

	}

}



EXPORT_SYMBOL(blk_plug_device);



/*
@@ -221,7 +224,6 @@ int blk_remove_plug(struct request_queue *q) 
	del_timer(&q->unplug_timer);

	return 1;

}



EXPORT_SYMBOL(blk_remove_plug);



/*
@@ -328,7 +330,6 @@ void blk_start_queue(struct request_queue *q) 
		kblockd_schedule_work(&q->unplug_work);

	}

}



EXPORT_SYMBOL(blk_start_queue);



/**
@@ -419,7 +420,6 @@ void blk_cleanup_queue(struct request_queue * q) 


	blk_put_queue(q);

}



EXPORT_SYMBOL(blk_cleanup_queue);



static int blk_init_free_list(struct request_queue *q)
@@ -575,7 +575,6 @@ int blk_get_queue(struct request_queue *q) 


	return 1;

}



EXPORT_SYMBOL(blk_get_queue);



static inline void blk_free_request(struct request_queue *q, struct request *rq)
@@ -888,7 +887,6 @@ void blk_requeue_request(struct request_queue *q, struct request *rq) 


	elv_requeue_request(q, rq);

}



EXPORT_SYMBOL(blk_requeue_request);



/**
@@ -939,7 +937,6 @@ void blk_insert_request(struct request_queue *q, struct request *rq, 
	blk_start_queueing(q);

	spin_unlock_irqrestore(q->queue_lock, flags);

}



EXPORT_SYMBOL(blk_insert_request);



/*
@@ -987,7 +984,6 @@ void disk_round_stats(struct gendisk *disk) 
	}

	disk->stamp = now;

}



EXPORT_SYMBOL_GPL(disk_round_stats);



/*
@@ -1017,7 +1013,6 @@ void __blk_put_request(struct request_queue *q, struct request *req) 
		freed_request(q, rw, priv);

	}

}



EXPORT_SYMBOL_GPL(__blk_put_request);



void blk_put_request(struct request *req)
@@ -1035,7 +1030,6 @@ void blk_put_request(struct request *req) 
		spin_unlock_irqrestore(q->queue_lock, flags);

	}

}



EXPORT_SYMBOL(blk_put_request);



void init_request_from_bio(struct request *req, struct bio *bio)
@@ -1350,7 +1344,7 @@ end_io: 
		}



		if (unlikely(nr_sectors > q->max_hw_sectors)) {

			printk("bio too big device %s (%u > %u)\n", 

			printk(KERN_ERR "bio too big device %s (%u > %u)\n",

				bdevname(bio->bi_bdev, b),

				bio_sectors(bio),

				q->max_hw_sectors);
@@ -1439,7 +1433,6 @@ void generic_make_request(struct bio *bio) 
	} while (bio);

	current->bio_tail = NULL; /* deactivate */

}



EXPORT_SYMBOL(generic_make_request);



/**
@@ -1486,7 +1479,6 @@ void submit_bio(int rw, struct bio *bio) 


	generic_make_request(bio);

}



EXPORT_SYMBOL(submit_bio);



/**
@@ -1518,9 +1510,8 @@ static int __end_that_request_first(struct request *req, int error, 
	if (!blk_pc_request(req))

		req->errors = 0;



	if (error) {

		if (blk_fs_request(req) && !(req->cmd_flags & REQ_QUIET))

			printk("end_request: I/O error, dev %s, sector %llu\n",

	if (error && (blk_fs_request(req) && !(req->cmd_flags & REQ_QUIET))) {

		printk(KERN_ERR "end_request: I/O error, dev %s, sector %llu\n",

				req->rq_disk ? req->rq_disk->disk_name : "?",

				(unsigned long long)req->sector);

	}
@@ -1554,9 +1545,9 @@ static int __end_that_request_first(struct request *req, int error, 


			if (unlikely(bio->bi_idx >= bio->bi_vcnt)) {

				blk_dump_rq_flags(req, "__end_that");

				printk("%s: bio idx %d >= vcnt %d\n",

						__FUNCTION__,

						bio->bi_idx, bio->bi_vcnt);

				printk(KERN_ERR "%s: bio idx %d >= vcnt %d\n",

						__FUNCTION__, bio->bi_idx,

						bio->bi_vcnt);

				break;

			}
@@ -1582,7 +1573,8 @@ static int __end_that_request_first(struct request *req, int error, 
		total_bytes += nbytes;

		nr_bytes -= nbytes;



		if ((bio = req->bio)) {

		bio = req->bio;

		if (bio) {

			/*

			 * end more in this run, or just return 'not-done'

			 */
@@ -1626,15 +1618,16 @@ static void blk_done_softirq(struct softirq_action *h) 
	local_irq_enable();



	while (!list_empty(&local_list)) {

		struct request *rq = list_entry(local_list.next, struct request, donelist);

		struct request *rq;



		rq = list_entry(local_list.next, struct request, donelist);

		list_del_init(&rq->donelist);

		rq->q->softirq_done_fn(rq);

	}

}



static int __cpuinit blk_cpu_notify(struct notifier_block *self, unsigned long action,

			  void *hcpu)

static int __cpuinit blk_cpu_notify(struct notifier_block *self,

				    unsigned long action, void *hcpu)

{

	/*

	 * If a CPU goes away, splice its entries to the current CPU
@@ -1685,7 +1678,6 @@ void blk_complete_request(struct request *req) 


	local_irq_restore(flags);

}



EXPORT_SYMBOL(blk_complete_request);



/*
@@ -1846,8 +1838,9 @@ EXPORT_SYMBOL(end_request); 
 *     0 - we are done with this request

 *     1 - this request is not freed yet, it still has pending buffers.

 **/

static int blk_end_io(struct request *rq, int error, int nr_bytes,

		      int bidi_bytes, int (drv_callback)(struct request *))

static int blk_end_io(struct request *rq, int error, unsigned int nr_bytes,

		      unsigned int bidi_bytes,

		      int (drv_callback)(struct request *))

{

	struct request_queue *q = rq->q;

	unsigned long flags = 0UL;
@@ -1889,7 +1882,7 @@ static int blk_end_io(struct request *rq, int error, int nr_bytes, 
 *     0 - we are done with this request

 *     1 - still buffers pending for this request

 **/

int blk_end_request(struct request *rq, int error, int nr_bytes)

int blk_end_request(struct request *rq, int error, unsigned int nr_bytes)

{

	return blk_end_io(rq, error, nr_bytes, 0, NULL);

}
@@ -1908,7 +1901,7 @@ EXPORT_SYMBOL_GPL(blk_end_request); 
 *     0 - we are done with this request

 *     1 - still buffers pending for this request

 **/

int __blk_end_request(struct request *rq, int error, int nr_bytes)

int __blk_end_request(struct request *rq, int error, unsigned int nr_bytes)

{

	if (blk_fs_request(rq) || blk_pc_request(rq)) {

		if (__end_that_request_first(rq, error, nr_bytes))
@@ -1937,8 +1930,8 @@ EXPORT_SYMBOL_GPL(__blk_end_request); 
 *     0 - we are done with this request

 *     1 - still buffers pending for this request

 **/

int blk_end_bidi_request(struct request *rq, int error, int nr_bytes,

			 int bidi_bytes)

int blk_end_bidi_request(struct request *rq, int error, unsigned int nr_bytes,

			 unsigned int bidi_bytes)

{

	return blk_end_io(rq, error, nr_bytes, bidi_bytes, NULL);

}
@@ -1969,7 +1962,8 @@ EXPORT_SYMBOL_GPL(blk_end_bidi_request); 
 *         this request still has pending buffers or

 *         the driver doesn't want to finish this request yet.

 **/

int blk_end_request_callback(struct request *rq, int error, int nr_bytes,

int blk_end_request_callback(struct request *rq, int error,

			     unsigned int nr_bytes,

			     int (drv_callback)(struct request *))

{

	return blk_end_io(rq, error, nr_bytes, 0, drv_callback);
@@ -2000,7 +1994,6 @@ int kblockd_schedule_work(struct work_struct *work) 
{

	return queue_work(kblockd_workqueue, work);

}



EXPORT_SYMBOL(kblockd_schedule_work);



void kblockd_flush_work(struct work_struct *work)

block/blk-exec.c

+0 −1
Original line number Diff line number Diff line
@@ -101,5 +101,4 @@ int blk_execute_rq(struct request_queue *q, struct gendisk *bd_disk, 


	return err;

}



EXPORT_SYMBOL(blk_execute_rq);

block/blk-ioc.c

+0 −9
Original line number Diff line number Diff line
@@ -176,15 +176,6 @@ void copy_io_context(struct io_context **pdst, struct io_context **psrc) 
}

EXPORT_SYMBOL(copy_io_context);



void swap_io_context(struct io_context **ioc1, struct io_context **ioc2)

{

	struct io_context *temp;

	temp = *ioc1;

	*ioc1 = *ioc2;

	*ioc2 = temp;

}

EXPORT_SYMBOL(swap_io_context);



int __init blk_ioc_init(void)

{

	iocontext_cachep = kmem_cache_create("blkdev_ioc",