diff options
author | Ingo Molnar <mingo@kernel.org> | 2020-04-13 09:44:39 +0200 |
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committer | Ingo Molnar <mingo@kernel.org> | 2020-04-13 09:44:39 +0200 |
commit | 3b02a051d25d9600e9d403ad3043aed7de00160e (patch) | |
tree | 5b8f58b79328c04654bf5ab6286401057edeca8f /drivers/md/dm.c | |
parent | kcsan, trace: Make KCSAN compatible with tracing (diff) | |
parent | Linux 5.7-rc1 (diff) | |
download | linux-dev-3b02a051d25d9600e9d403ad3043aed7de00160e.tar.xz linux-dev-3b02a051d25d9600e9d403ad3043aed7de00160e.zip |
Merge tag 'v5.7-rc1' into locking/kcsan, to resolve conflicts and refresh
Resolve these conflicts:
arch/x86/Kconfig
arch/x86/kernel/Makefile
Do a minor "evil merge" to move the KCSAN entry up a bit by a few lines
in the Kconfig to reduce the probability of future conflicts.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/md/dm.c')
-rw-r--r-- | drivers/md/dm.c | 47 |
1 files changed, 39 insertions, 8 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 0413018c8305..db9e46114653 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -25,6 +25,7 @@ #include <linux/wait.h> #include <linux/pr.h> #include <linux/refcount.h> +#include <linux/part_stat.h> #define DM_MSG_PREFIX "core" @@ -1198,6 +1199,35 @@ static size_t dm_dax_copy_to_iter(struct dax_device *dax_dev, pgoff_t pgoff, return ret; } +static int dm_dax_zero_page_range(struct dax_device *dax_dev, pgoff_t pgoff, + size_t nr_pages) +{ + struct mapped_device *md = dax_get_private(dax_dev); + sector_t sector = pgoff * PAGE_SECTORS; + struct dm_target *ti; + int ret = -EIO; + int srcu_idx; + + ti = dm_dax_get_live_target(md, sector, &srcu_idx); + + if (!ti) + goto out; + if (WARN_ON(!ti->type->dax_zero_page_range)) { + /* + * ->zero_page_range() is mandatory dax operation. If we are + * here, something is wrong. + */ + dm_put_live_table(md, srcu_idx); + goto out; + } + ret = ti->type->dax_zero_page_range(ti, pgoff, nr_pages); + + out: + dm_put_live_table(md, srcu_idx); + + return ret; +} + /* * A target may call dm_accept_partial_bio only from the map routine. It is * allowed for all bio types except REQ_PREFLUSH, REQ_OP_ZONE_RESET, @@ -1739,8 +1769,9 @@ static blk_qc_t dm_process_bio(struct mapped_device *md, * won't be imposed. */ if (current->bio_list) { - blk_queue_split(md->queue, &bio); - if (!is_abnormal_io(bio)) + if (is_abnormal_io(bio)) + blk_queue_split(md->queue, &bio); + else dm_queue_split(md, ti, &bio); } @@ -1938,16 +1969,15 @@ static struct mapped_device *alloc_dev(int minor) INIT_LIST_HEAD(&md->table_devices); spin_lock_init(&md->uevent_lock); - md->queue = blk_alloc_queue_node(GFP_KERNEL, numa_node_id); - if (!md->queue) - goto bad; - md->queue->queuedata = md; /* * default to bio-based required ->make_request_fn until DM * table is loaded and md->type established. If request-based * table is loaded: blk-mq will override accordingly. */ - blk_queue_make_request(md->queue, dm_make_request); + md->queue = blk_alloc_queue(dm_make_request, numa_node_id); + if (!md->queue) + goto bad; + md->queue->queuedata = md; md->disk = alloc_disk_node(1, md->numa_node_id); if (!md->disk) @@ -1968,7 +1998,7 @@ static struct mapped_device *alloc_dev(int minor) if (IS_ENABLED(CONFIG_DAX_DRIVER)) { md->dax_dev = alloc_dax(md, md->disk->disk_name, &dm_dax_ops, 0); - if (!md->dax_dev) + if (IS_ERR(md->dax_dev)) goto bad; } @@ -3199,6 +3229,7 @@ static const struct dax_operations dm_dax_ops = { .dax_supported = dm_dax_supported, .copy_from_iter = dm_dax_copy_from_iter, .copy_to_iter = dm_dax_copy_to_iter, + .zero_page_range = dm_dax_zero_page_range, }; /* |