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 <hch@xxxxxxxxxxxxx>
Signed-off-by: Vivek Goyal <vgoyal@xxxxxxxxxx>
---
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
--
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