Merge tag 'libnvdimm-for-4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdim...

[linux-2.6-block.git] / drivers / block / brd.c

diff --git a/drivers/block/brd.c b/drivers/block/brd.c
index b2391bbd7e5a88bf4c1319865f8cbb67a75ecfa2..8028a3a7e7fd63cabb8ce47c021e90e26d09a7ba 100644 (file)
--- a/drivers/block/brd.c
+++ b/drivers/block/brd.c
@@ -20,6 +20,7 @@
 #include <linux/radix-tree.h>
 #include <linux/fs.h>
 #include <linux/slab.h>
+#include <linux/backing-dev.h>
 
 #include <linux/uaccess.h>
 
@@ -52,7 +53,6 @@ struct brd_device {
 /*
  * Look up and return a brd's page for a given sector.
  */
-static DEFINE_MUTEX(brd_mutex);
 static struct page *brd_lookup_page(struct brd_device *brd, sector_t sector)
 {
        pgoff_t idx;
@@ -401,6 +401,7 @@ static struct brd_device *brd_alloc(int i)
        disk->flags             = GENHD_FL_EXT_DEVT;
        sprintf(disk->disk_name, "ram%d", i);
        set_capacity(disk, rd_size * 2);
+       disk->queue->backing_dev_info->capabilities |= BDI_CAP_SYNCHRONOUS_IO;
 
        return brd;