Merge branch 'linus' into x86/x2apic

Conflicts:

	arch/x86/kernel/genapic_64.c

Manual merge:

	arch/x86/kernel/genx2apic_uv_x.c

Signed-off-by: Ingo Molnar <mingo@elte.hu>

6 files changed, 47 insertions, 37 deletions

diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
index 621a272a2c7..7e65bad522c 100644
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -1234,7 +1234,7 @@ int bitmap_startwrite(struct bitmap *bitmap, sector_t offset, unsigned long sect
 		case 0:
 			bitmap_file_set_bit(bitmap, offset);
 			bitmap_count_page(bitmap,offset, 1);
-			blk_plug_device(bitmap->mddev->queue);
+			blk_plug_device_unlocked(bitmap->mddev->queue);
 			/* fall through */
 		case 1:
 			*bmc = 2;
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index fea966d66f9..71dd65aa31b 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -147,9 +147,12 @@ static struct priority_group *alloc_priority_group(void)
 static void free_pgpaths(struct list_head *pgpaths, struct dm_target *ti)
 {
 	struct pgpath *pgpath, *tmp;
+	struct multipath *m = ti->private;
 
 	list_for_each_entry_safe(pgpath, tmp, pgpaths, list) {
 		list_del(&pgpath->list);
+		if (m->hw_handler_name)
+			scsi_dh_detach(bdev_get_queue(pgpath->path.dev->bdev));
 		dm_put_device(ti, pgpath->path.dev);
 		free_pgpath(pgpath);
 	}
@@ -548,6 +551,7 @@ static struct pgpath *parse_path(struct arg_set *as, struct path_selector *ps,
 {
 	int r;
 	struct pgpath *p;
+	struct multipath *m = ti->private;
 
 	/* we need at least a path arg */
 	if (as->argc < 1) {
@@ -566,6 +570,15 @@ static struct pgpath *parse_path(struct arg_set *as, struct path_selector *ps,
 		goto bad;
 	}
 
+	if (m->hw_handler_name) {
+		r = scsi_dh_attach(bdev_get_queue(p->path.dev->bdev),
+				   m->hw_handler_name);
+		if (r < 0) {
+			dm_put_device(ti, p->path.dev);
+			goto bad;
+		}
+	}
+
 	r = ps->type->add_path(ps, &p->path, as->argc, as->argv, &ti->error);
 	if (r) {
 		dm_put_device(ti, p->path.dev);
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 798e468103b..61f44140923 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -316,29 +316,12 @@ static inline int check_space(struct dm_table *t)
  */
 static int lookup_device(const char *path, dev_t *dev)
 {
-	int r;
-	struct nameidata nd;
-	struct inode *inode;
-
-	if ((r = path_lookup(path, LOOKUP_FOLLOW, &nd)))
-		return r;
-
-	inode = nd.path.dentry->d_inode;
-	if (!inode) {
-		r = -ENOENT;
-		goto out;
-	}
-
-	if (!S_ISBLK(inode->i_mode)) {
-		r = -ENOTBLK;
-		goto out;
-	}
-
-	*dev = inode->i_rdev;
-
- out:
-	path_put(&nd.path);
-	return r;
+	struct block_device *bdev = lookup_bdev(path);
+	if (IS_ERR(bdev))
+		return PTR_ERR(bdev);
+	*dev = bdev->bd_dev;
+	bdput(bdev);
+	return 0;
 }
 
 /*
diff --git a/drivers/md/md.c b/drivers/md/md.c
index c2ff77ccec5..c7aae66c6f9 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -3483,7 +3483,7 @@ static void md_safemode_timeout(unsigned long data)
 	if (!atomic_read(&mddev->writes_pending)) {
 		mddev->safemode = 1;
 		if (mddev->external)
-			sysfs_notify(&mddev->kobj, NULL, "array_state");
+			set_bit(MD_NOTIFY_ARRAY_STATE, &mddev->flags);
 	}
 	md_wakeup_thread(mddev->thread);
 }
@@ -5996,7 +5996,8 @@ static int remove_and_add_spares(mddev_t *mddev)
 	if (mddev->degraded) {
 		rdev_for_each(rdev, rtmp, mddev) {
 			if (rdev->raid_disk >= 0 &&
-			    !test_bit(In_sync, &rdev->flags))
+			    !test_bit(In_sync, &rdev->flags) &&
+			    !test_bit(Blocked, &rdev->flags))
 				spares++;
 			if (rdev->raid_disk < 0
 			    && !test_bit(Faulty, &rdev->flags)) {
@@ -6051,6 +6052,9 @@ void md_check_recovery(mddev_t *mddev)
 	if (mddev->bitmap)
 		bitmap_daemon_work(mddev->bitmap);
 
+	if (test_and_clear_bit(MD_NOTIFY_ARRAY_STATE, &mddev->flags))
+		sysfs_notify(&mddev->kobj, NULL, "array_state");
+
 	if (mddev->ro)
 		return;
 
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 159535d7356..d41bebb6da0 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -215,6 +215,9 @@ static void reschedule_retry(r10bio_t *r10_bio)
 	conf->nr_queued ++;
 	spin_unlock_irqrestore(&conf->device_lock, flags);
 
+	/* wake up frozen array... */
+	wake_up(&conf->wait_barrier);
+
 	md_wakeup_thread(mddev->thread);
 }
 
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 55e7c56045a..40e93967565 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -2507,7 +2507,7 @@ static void handle_stripe_expansion(raid5_conf_t *conf, struct stripe_head *sh,
  *
  */
 
-static void handle_stripe5(struct stripe_head *sh)
+static bool handle_stripe5(struct stripe_head *sh)
 {
 	raid5_conf_t *conf = sh->raid_conf;
 	int disks = sh->disks, i;
@@ -2717,10 +2717,11 @@ static void handle_stripe5(struct stripe_head *sh)
 	if (sh->reconstruct_state == reconstruct_state_result) {
 		sh->reconstruct_state = reconstruct_state_idle;
 		clear_bit(STRIPE_EXPANDING, &sh->state);
-		for (i = conf->raid_disks; i--; )
+		for (i = conf->raid_disks; i--; ) {
 			set_bit(R5_Wantwrite, &sh->dev[i].flags);
-			set_bit(R5_LOCKED, &dev->flags);
+			set_bit(R5_LOCKED, &sh->dev[i].flags);
 			s.locked++;
+		}
 	}
 
 	if (s.expanded && test_bit(STRIPE_EXPANDING, &sh->state) &&
@@ -2754,9 +2755,11 @@ static void handle_stripe5(struct stripe_head *sh)
 	ops_run_io(sh, &s);
 
 	return_io(return_bi);
+
+	return blocked_rdev == NULL;
 }
 
-static void handle_stripe6(struct stripe_head *sh, struct page *tmp_page)
+static bool handle_stripe6(struct stripe_head *sh, struct page *tmp_page)
 {
 	raid6_conf_t *conf = sh->raid_conf;
 	int disks = sh->disks;
@@ -2967,14 +2970,17 @@ static void handle_stripe6(struct stripe_head *sh, struct page *tmp_page)
 	ops_run_io(sh, &s);
 
 	return_io(return_bi);
+
+	return blocked_rdev == NULL;
 }
 
-static void handle_stripe(struct stripe_head *sh, struct page *tmp_page)
+/* returns true if the stripe was handled */
+static bool handle_stripe(struct stripe_head *sh, struct page *tmp_page)
 {
 	if (sh->raid_conf->level == 6)
-		handle_stripe6(sh, tmp_page);
+		return handle_stripe6(sh, tmp_page);
 	else
-		handle_stripe5(sh);
+		return handle_stripe5(sh);
 }
 
 
@@ -3692,7 +3698,9 @@ static inline sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *ski
 	clear_bit(STRIPE_INSYNC, &sh->state);
 	spin_unlock(&sh->lock);
 
-	handle_stripe(sh, NULL);
+	/* wait for any blocked device to be handled */
+	while(unlikely(!handle_stripe(sh, NULL)))
+		;
 	release_stripe(sh);
 
 	return STRIPE_SECTORS;
@@ -3811,10 +3819,8 @@ static void raid5d(mddev_t *mddev)
 
 		sh = __get_priority_stripe(conf);
 
-		if (!sh) {
-			async_tx_issue_pending_all();
+		if (!sh)
 			break;
-		}
 		spin_unlock_irq(&conf->device_lock);
 		
 		handled++;
@@ -3827,6 +3833,7 @@ static void raid5d(mddev_t *mddev)
 
 	spin_unlock_irq(&conf->device_lock);
 
+	async_tx_issue_pending_all();
 	unplug_slaves(mddev);
 
 	pr_debug("--- raid5d inactive\n");