ieee1394: merge from Linus

Conflicts: drivers/ieee1394/hosts.c
Patch "lockdep: annotate ieee1394 skb-queue-head locking" was meddling
with patch "ieee1394: fix kerneldoc of hpsb_alloc_host".

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

5 files changed, 15 insertions, 9 deletions

diff --git a/block/blktrace.c b/block/blktrace.c
index 92925e7d9e6c..265f7a830619 100644
--- a/block/blktrace.c
+++ b/block/blktrace.c
@@ -69,7 +69,7 @@ static u32 ddir_act[2] __read_mostly = { BLK_TC_ACT(BLK_TC_READ), BLK_TC_ACT(BLK
 /*
  * Bio action bits of interest
  */
-static u32 bio_act[3] __read_mostly = { 0, BLK_TC_ACT(BLK_TC_BARRIER), BLK_TC_ACT(BLK_TC_SYNC) };
+static u32 bio_act[5] __read_mostly = { 0, BLK_TC_ACT(BLK_TC_BARRIER), BLK_TC_ACT(BLK_TC_SYNC), 0, BLK_TC_ACT(BLK_TC_AHEAD) };
 
 /*
  * More could be added as needed, taking care to increment the decrementer
@@ -79,6 +79,8 @@ static u32 bio_act[3] __read_mostly = { 0, BLK_TC_ACT(BLK_TC_BARRIER), BLK_TC_AC
 	(((rw) & (1 << BIO_RW_BARRIER)) >> (BIO_RW_BARRIER - 0))
 #define trace_sync_bit(rw)	\
 	(((rw) & (1 << BIO_RW_SYNC)) >> (BIO_RW_SYNC - 1))
+#define trace_ahead_bit(rw)	\
+	(((rw) & (1 << BIO_RW_AHEAD)) << (2 - BIO_RW_AHEAD))
 
 /*
  * The worker for the various blk_add_trace*() types. Fills out a
@@ -100,6 +102,7 @@ void __blk_add_trace(struct blk_trace *bt, sector_t sector, int bytes,
 	what |= ddir_act[rw & WRITE];
 	what |= bio_act[trace_barrier_bit(rw)];
 	what |= bio_act[trace_sync_bit(rw)];
+	what |= bio_act[trace_ahead_bit(rw)];
 
 	pid = tsk->pid;
 	if (unlikely(act_log_check(bt, what, sector, pid)))
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 102ebc2c5c34..3a3aee08ec5f 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -936,7 +936,7 @@ static int cfq_arm_slice_timer(struct cfq_data *cfqd, struct cfq_queue *cfqq)
 	 * seeks. so allow a little bit of time for him to submit a new rq
 	 */
 	if (sample_valid(cic->seek_samples) && CIC_SEEKY(cic))
-		sl = 2;
+		sl = min(sl, msecs_to_jiffies(2));
 
 	mod_timer(&cfqd->idle_slice_timer, jiffies + sl);
 	return 1;
@@ -1561,7 +1561,7 @@ restart:
 		/* ->key must be copied to avoid race with cfq_exit_queue() */
 		k = __cic->key;
 		if (unlikely(!k)) {
-			cfq_drop_dead_cic(ioc, cic);
+			cfq_drop_dead_cic(ioc, __cic);
 			goto restart;
 		}
 
diff --git a/block/elevator.c b/block/elevator.c
index bc7baeec0d10..9b72dc7c8a5c 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -765,7 +765,8 @@ void elv_unregister(struct elevator_type *e)
 		read_lock(&tasklist_lock);
 		do_each_thread(g, p) {
 			task_lock(p);
-			e->ops.trim(p->io_context);
+			if (p->io_context)
+				e->ops.trim(p->io_context);
 			task_unlock(p);
 		} while_each_thread(g, p);
 		read_unlock(&tasklist_lock);
diff --git a/block/ioctl.c b/block/ioctl.c
index 9cfa2e1ecb24..309760b7e37f 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -72,7 +72,7 @@ static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user
 			bdevp = bdget_disk(disk, part);
 			if (!bdevp)
 				return -ENOMEM;
-			mutex_lock(&bdevp->bd_mutex);
+			mutex_lock_nested(&bdevp->bd_mutex, BD_MUTEX_PARTITION);
 			if (bdevp->bd_openers) {
 				mutex_unlock(&bdevp->bd_mutex);
 				bdput(bdevp);
@@ -82,7 +82,7 @@ static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user
 			fsync_bdev(bdevp);
 			invalidate_bdev(bdevp, 0);
 
-			mutex_lock(&bdev->bd_mutex);
+			mutex_lock_nested(&bdev->bd_mutex, BD_MUTEX_WHOLE);
 			delete_partition(disk, part);
 			mutex_unlock(&bdev->bd_mutex);
 			mutex_unlock(&bdevp->bd_mutex);
diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c
index 5813d63c20af..ddd9253f9d55 100644
--- a/block/ll_rw_blk.c
+++ b/block/ll_rw_blk.c
@@ -2516,7 +2516,7 @@ EXPORT_SYMBOL_GPL(blk_execute_rq_nowait);
 int blk_execute_rq(request_queue_t *q, struct gendisk *bd_disk,
 		   struct request *rq, int at_head)
 {
-	DECLARE_COMPLETION(wait);
+	DECLARE_COMPLETION_ONSTACK(wait);
 	char sense[SCSI_SENSE_BUFFERSIZE];
 	int err = 0;
 
@@ -3491,8 +3491,8 @@ EXPORT_SYMBOL(end_request);
 
 void blk_rq_bio_prep(request_queue_t *q, struct request *rq, struct bio *bio)
 {
-	/* first three bits are identical in rq->flags and bio->bi_rw */
-	rq->flags |= (bio->bi_rw & 7);
+	/* first two bits are identical in rq->flags and bio->bi_rw */
+	rq->flags |= (bio->bi_rw & 3);
 
 	rq->nr_phys_segments = bio_phys_segments(q, bio);
 	rq->nr_hw_segments = bio_hw_segments(q, bio);
@@ -3628,6 +3628,8 @@ struct io_context *current_io_context(gfp_t gfp_flags)
 		ret->nr_batch_requests = 0; /* because this is 0 */
 		ret->aic = NULL;
 		ret->cic_root.rb_node = NULL;
+		/* make sure set_task_ioprio() sees the settings above */
+		smp_wmb();
 		tsk->io_context = ret;
 	}