Add UNPLUG traces to all appropriate places

[linux.git] / drivers / md / dm-table.c

diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 2fc199b0016bd5c819b42572b97dbc69dc03844c..e298d8d11f24bb1892d959833dbd84cf4f9e16e6 100644 (file)
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -102,6 +102,8 @@ static void combine_restrictions_low(struct io_restrictions *lhs,
        lhs->seg_boundary_mask =
                min_not_zero(lhs->seg_boundary_mask, rhs->seg_boundary_mask);
 
+       lhs->bounce_pfn = min_not_zero(lhs->bounce_pfn, rhs->bounce_pfn);
+
        lhs->no_cluster |= rhs->no_cluster;
 }
 
@@ -213,12 +215,11 @@ static int alloc_targets(struct dm_table *t, unsigned int num)
 int dm_table_create(struct dm_table **result, int mode,
                    unsigned num_targets, struct mapped_device *md)
 {
-       struct dm_table *t = kmalloc(sizeof(*t), GFP_KERNEL);
+       struct dm_table *t = kzalloc(sizeof(*t), GFP_KERNEL);
 
        if (!t)
                return -ENOMEM;
 
-       memset(t, 0, sizeof(*t));
        INIT_LIST_HEAD(&t->devices);
        atomic_set(&t->holders, 1);
 
@@ -526,7 +527,7 @@ static int __table_get_device(struct dm_table *t, struct dm_target *ti,
 
 void dm_set_device_limits(struct dm_target *ti, struct block_device *bdev)
 {
-       request_queue_t *q = bdev_get_queue(bdev);
+       struct request_queue *q = bdev_get_queue(bdev);
        struct io_restrictions *rs = &ti->limits;
 
        /*
@@ -567,6 +568,8 @@ void dm_set_device_limits(struct dm_target *ti, struct block_device *bdev)
                min_not_zero(rs->seg_boundary_mask,
                             q->seg_boundary_mask);
 
+       rs->bounce_pfn = min_not_zero(rs->bounce_pfn, q->bounce_pfn);
+
        rs->no_cluster |= !test_bit(QUEUE_FLAG_CLUSTER, &q->queue_flags);
 }
 EXPORT_SYMBOL_GPL(dm_set_device_limits);
@@ -708,6 +711,8 @@ static void check_for_valid_limits(struct io_restrictions *rs)
                rs->max_segment_size = MAX_SEGMENT_SIZE;
        if (!rs->seg_boundary_mask)
                rs->seg_boundary_mask = -1;
+       if (!rs->bounce_pfn)
+               rs->bounce_pfn = -1;
 }
 
 int dm_table_add_target(struct dm_table *t, const char *type,
@@ -892,6 +897,7 @@ void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q)
        q->hardsect_size = t->limits.hardsect_size;
        q->max_segment_size = t->limits.max_segment_size;
        q->seg_boundary_mask = t->limits.seg_boundary_mask;
+       q->bounce_pfn = t->limits.bounce_pfn;
        if (t->limits.no_cluster)
                q->queue_flags &= ~(1 << QUEUE_FLAG_CLUSTER);
        else
@@ -979,7 +985,7 @@ int dm_table_any_congested(struct dm_table *t, int bdi_bits)
        devices = dm_table_get_devices(t);
        for (d = devices->next; d != devices; d = d->next) {
                struct dm_dev *dd = list_entry(d, struct dm_dev, list);
-               request_queue_t *q = bdev_get_queue(dd->bdev);
+               struct request_queue *q = bdev_get_queue(dd->bdev);
                r |= bdi_congested(&q->backing_dev_info, bdi_bits);
        }
 
@@ -992,38 +998,10 @@ void dm_table_unplug_all(struct dm_table *t)
 
        for (d = devices->next; d != devices; d = d->next) {
                struct dm_dev *dd = list_entry(d, struct dm_dev, list);
-               request_queue_t *q = bdev_get_queue(dd->bdev);
-
-               if (q->unplug_fn)
-                       q->unplug_fn(q);
-       }
-}
-
-int dm_table_flush_all(struct dm_table *t)
-{
-       struct list_head *d, *devices = dm_table_get_devices(t);
-       int ret = 0;
-       unsigned i;
-
-       for (i = 0; i < t->num_targets; i++)
-               if (t->targets[i].type->flush)
-                       t->targets[i].type->flush(&t->targets[i]);
-
-       for (d = devices->next; d != devices; d = d->next) {
-               struct dm_dev *dd = list_entry(d, struct dm_dev, list);
-               request_queue_t *q = bdev_get_queue(dd->bdev);
-               int err;
-
-               if (!q->issue_flush_fn)
-                       err = -EOPNOTSUPP;
-               else
-                       err = q->issue_flush_fn(q, dd->bdev->bd_disk, NULL);
+               struct request_queue *q = bdev_get_queue(dd->bdev);
 
-               if (!ret)
-                       ret = err;
+               blk_unplug(q);
        }
-
-       return ret;
 }
 
 struct mapped_device *dm_table_get_md(struct dm_table *t)
@@ -1043,4 +1021,3 @@ EXPORT_SYMBOL(dm_table_get_md);
 EXPORT_SYMBOL(dm_table_put);
 EXPORT_SYMBOL(dm_table_get);
 EXPORT_SYMBOL(dm_table_unplug_all);
-EXPORT_SYMBOL(dm_table_flush_all);