diff options
Diffstat (limited to 'fs/block_dev.c')
| -rw-r--r-- | fs/block_dev.c | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c index afb437484362..826b164a4b5b 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -1201,7 +1201,11 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part) bdev->bd_disk = disk; bdev->bd_queue = disk->queue; bdev->bd_contains = bdev; - bdev->bd_inode->i_flags = disk->fops->direct_access ? S_DAX : 0; + if (IS_ENABLED(CONFIG_BLK_DEV_DAX) && disk->fops->direct_access) + bdev->bd_inode->i_flags = S_DAX; + else + bdev->bd_inode->i_flags = 0; + if (!partno) { ret = -ENXIO; bdev->bd_part = disk_get_part(disk, partno); @@ -1693,13 +1697,24 @@ static int blkdev_releasepage(struct page *page, gfp_t wait) return try_to_free_buffers(page); } +static int blkdev_writepages(struct address_space *mapping, + struct writeback_control *wbc) +{ + if (dax_mapping(mapping)) { + struct block_device *bdev = I_BDEV(mapping->host); + + return dax_writeback_mapping_range(mapping, bdev, wbc); + } + return generic_writepages(mapping, wbc); +} + static const struct address_space_operations def_blk_aops = { .readpage = blkdev_readpage, .readpages = blkdev_readpages, .writepage = blkdev_writepage, .write_begin = blkdev_write_begin, .write_end = blkdev_write_end, - .writepages = generic_writepages, + .writepages = blkdev_writepages, .releasepage = blkdev_releasepage, .direct_IO = blkdev_direct_IO, .is_dirty_writeback = buffer_check_dirty_writeback, @@ -1730,6 +1745,12 @@ static int blkdev_dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf) return __dax_fault(vma, vmf, blkdev_get_block, NULL); } +static int blkdev_dax_pfn_mkwrite(struct vm_area_struct *vma, + struct vm_fault *vmf) +{ + return dax_pfn_mkwrite(vma, vmf); +} + static int blkdev_dax_pmd_fault(struct vm_area_struct *vma, unsigned long addr, pmd_t *pmd, unsigned int flags) { @@ -1739,7 +1760,7 @@ static int blkdev_dax_pmd_fault(struct vm_area_struct *vma, unsigned long addr, static const struct vm_operations_struct blkdev_dax_vm_ops = { .fault = blkdev_dax_fault, .pmd_fault = blkdev_dax_pmd_fault, - .pfn_mkwrite = blkdev_dax_fault, + .pfn_mkwrite = blkdev_dax_pfn_mkwrite, }; static const struct vm_operations_struct blkdev_default_vm_ops = { |