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authorDan Williams <dan.j.williams@intel.com>2015-06-25 11:20:04 +0300
committerDan Williams <dan.j.williams@intel.com>2015-06-25 11:20:04 +0300
commit8c2f7e8658df1d3b7cbfa62706941d14c715823a (patch)
treeac93512841113f4d1d7a38d788ec73bb21e2d605 /drivers/nvdimm/label.c
parent0ba1c634892b3590779803a701bcb82e8c32cc7a (diff)
downloadlinux-8c2f7e8658df1d3b7cbfa62706941d14c715823a.tar.xz
libnvdimm: infrastructure for btt devices
NVDIMM namespaces, in addition to accepting "struct bio" based requests, also have the capability to perform byte-aligned accesses. By default only the bio/block interface is used. However, if another driver can make effective use of the byte-aligned capability it can claim namespace interface and use the byte-aligned ->rw_bytes() interface. The BTT driver is the initial first consumer of this mechanism to allow adding atomic sector update semantics to a pmem or blk namespace. This patch is the sysfs infrastructure to allow configuring a BTT instance for a namespace. Enabling that BTT and performing i/o is in a subsequent patch. Cc: Greg KH <gregkh@linuxfoundation.org> Cc: Neil Brown <neilb@suse.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm/label.c')
-rw-r--r--drivers/nvdimm/label.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/nvdimm/label.c b/drivers/nvdimm/label.c
index 34148003fc73..96526dcfdd37 100644
--- a/drivers/nvdimm/label.c
+++ b/drivers/nvdimm/label.c
@@ -666,7 +666,7 @@ static int __blk_label_update(struct nd_region *nd_region,
/* don't allow updates that consume the last label */
if (nfree - alloc < 0 || nfree - alloc + victims < 1) {
- dev_info(&nsblk->dev, "insufficient label space\n");
+ dev_info(&nsblk->common.dev, "insufficient label space\n");
kfree(victim_map);
return -ENOSPC;
}
@@ -762,7 +762,8 @@ static int __blk_label_update(struct nd_region *nd_region,
continue;
res = to_resource(ndd, nd_label);
res->flags &= ~DPA_RESOURCE_ADJUSTED;
- dev_vdbg(&nsblk->dev, "assign label[%d] slot: %d\n", l, slot);
+ dev_vdbg(&nsblk->common.dev, "assign label[%d] slot: %d\n",
+ l, slot);
nd_mapping->labels[l++] = nd_label;
}
nd_mapping->labels[l] = NULL;