Merge tag 'libnvdimm-for-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdim...

[karo-tx-linux.git] / fs / ext2 / inode.c

diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index 3a38c1b84e3cd992b165aed306f2d9f04e6e135b..26d77f9f8c12e69f48bc6cc1c4f47bb6fab27ebd 100644 (file)
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -799,6 +799,7 @@ int ext2_get_block(struct inode *inode, sector_t iblock,
 static int ext2_iomap_begin(struct inode *inode, loff_t offset, loff_t length,
                unsigned flags, struct iomap *iomap)
 {
+       struct block_device *bdev;
        unsigned int blkbits = inode->i_blkbits;
        unsigned long first_block = offset >> blkbits;
        unsigned long max_blocks = (length + (1 << blkbits) - 1) >> blkbits;
@@ -812,8 +813,13 @@ static int ext2_iomap_begin(struct inode *inode, loff_t offset, loff_t length,
                return ret;
 
        iomap->flags = 0;
-       iomap->bdev = inode->i_sb->s_bdev;
+       bdev = inode->i_sb->s_bdev;
+       iomap->bdev = bdev;
        iomap->offset = (u64)first_block << blkbits;
+       if (blk_queue_dax(bdev->bd_queue))
+               iomap->dax_dev = dax_get_by_host(bdev->bd_disk->disk_name);
+       else
+               iomap->dax_dev = NULL;
 
        if (ret == 0) {
                iomap->type = IOMAP_HOLE;
@@ -835,6 +841,7 @@ static int
 ext2_iomap_end(struct inode *inode, loff_t offset, loff_t length,
                ssize_t written, unsigned flags, struct iomap *iomap)
 {
+       put_dax(iomap->dax_dev);
        if (iomap->type == IOMAP_MAPPED &&
            written < length &&
            (flags & IOMAP_WRITE))