Add a helper dax_ioamp_zero() to zero a range. This patch basically merges __dax_zero_page_range() and iomap_dax_zero().
Suggested-by: Christoph Hellwig <[email protected]> Signed-off-by: Vivek Goyal <[email protected]> --- fs/dax.c | 12 ++++++------ fs/iomap/buffered-io.c | 9 +-------- include/linux/dax.h | 11 +++++------ 3 files changed, 12 insertions(+), 20 deletions(-) diff --git a/fs/dax.c b/fs/dax.c index 1b9ba6b59cdb..63303e274221 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -1059,23 +1059,23 @@ int generic_dax_zero_page_range(struct dax_device *dax_dev, pgoff_t pgoff, } EXPORT_SYMBOL_GPL(generic_dax_zero_page_range); -int __dax_zero_page_range(struct block_device *bdev, - struct dax_device *dax_dev, sector_t sector, - unsigned int offset, unsigned int size) +int dax_iomap_zero(loff_t pos, unsigned offset, unsigned size, + struct iomap *iomap) { pgoff_t pgoff; long rc, id; + sector_t sector = iomap_sector(iomap, pos & PAGE_MASK); - rc = bdev_dax_pgoff(bdev, sector, PAGE_SIZE, &pgoff); + rc = bdev_dax_pgoff(iomap->bdev, sector, PAGE_SIZE, &pgoff); if (rc) return rc; id = dax_read_lock(); - rc = dax_zero_page_range(dax_dev, pgoff, offset, size); + rc = dax_zero_page_range(iomap->dax_dev, pgoff, offset, size); dax_read_unlock(id); return rc; } -EXPORT_SYMBOL_GPL(__dax_zero_page_range); +EXPORT_SYMBOL_GPL(dax_iomap_zero); static loff_t dax_iomap_actor(struct inode *inode, loff_t pos, loff_t length, void *data, diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index 828444e14d09..5a5d784a110e 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -974,13 +974,6 @@ static int iomap_zero(struct inode *inode, loff_t pos, unsigned offset, return iomap_write_end(inode, pos, bytes, bytes, page, iomap, srcmap); } -static int iomap_dax_zero(loff_t pos, unsigned offset, unsigned bytes, - struct iomap *iomap) -{ - return __dax_zero_page_range(iomap->bdev, iomap->dax_dev, - iomap_sector(iomap, pos & PAGE_MASK), offset, bytes); -} - static loff_t iomap_zero_range_actor(struct inode *inode, loff_t pos, loff_t count, void *data, struct iomap *iomap, struct iomap *srcmap) @@ -1000,7 +993,7 @@ iomap_zero_range_actor(struct inode *inode, loff_t pos, loff_t count, bytes = min_t(loff_t, PAGE_SIZE - offset, count); if (IS_DAX(inode)) - status = iomap_dax_zero(pos, offset, bytes, iomap); + status = dax_iomap_zero(pos, offset, bytes, iomap); else status = iomap_zero(inode, pos, offset, bytes, iomap, srcmap); diff --git a/include/linux/dax.h b/include/linux/dax.h index 3356b874c55d..ffaaa12f8ca9 100644 --- a/include/linux/dax.h +++ b/include/linux/dax.h @@ -13,6 +13,7 @@ typedef unsigned long dax_entry_t; struct iomap_ops; +struct iomap; struct dax_device; struct dax_operations { /* @@ -228,13 +229,11 @@ int dax_invalidate_mapping_entry_sync(struct address_space *mapping, pgoff_t index); #ifdef CONFIG_FS_DAX -int __dax_zero_page_range(struct block_device *bdev, - struct dax_device *dax_dev, sector_t sector, - unsigned int offset, unsigned int length); +int dax_iomap_zero(loff_t pos, unsigned offset, unsigned size, + struct iomap *iomap); #else -static inline int __dax_zero_page_range(struct block_device *bdev, - struct dax_device *dax_dev, sector_t sector, - unsigned int offset, unsigned int length) +static inline int dax_iomap_zero(loff_t pos, unsigned offset, unsigned size, + struct iomap *iomap) { return -ENXIO; } -- 2.18.1 -- dm-devel mailing list [email protected] https://www.redhat.com/mailman/listinfo/dm-devel
