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authorVivek Goyal <vgoyal@redhat.com>2020-02-28 19:34:56 +0300
committerDan Williams <dan.j.williams@intel.com>2020-04-03 05:15:03 +0300
commit4f3b4f161d7a070d2181dbcf7fbd97c7631d5c24 (patch)
tree21bbf50c24f916831cfc041fcbcc17aa42dca1d9 /include/linux/dax.h
parent0a23f9ffa5ac20d3c95a6e850f4ee68e4034f781 (diff)
downloadlinux-4f3b4f161d7a070d2181dbcf7fbd97c7631d5c24.tar.xz
dax,iomap: Add helper dax_iomap_zero() to zero a range
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@infradead.org> Signed-off-by: Vivek Goyal <vgoyal@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20200228163456.1587-7-vgoyal@redhat.com Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'include/linux/dax.h')
-rw-r--r--include/linux/dax.h17
1 files changed, 3 insertions, 14 deletions
diff --git a/include/linux/dax.h b/include/linux/dax.h
index 71735c430c05..d7af5d243f24 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 {
/*
@@ -214,20 +215,8 @@ vm_fault_t dax_finish_sync_fault(struct vm_fault *vmf,
int dax_delete_mapping_entry(struct address_space *mapping, pgoff_t index);
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);
-#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)
-{
- return -ENXIO;
-}
-#endif
-
+int dax_iomap_zero(loff_t pos, unsigned offset, unsigned size,
+ struct iomap *iomap);
static inline bool dax_mapping(struct address_space *mapping)
{
return mapping->host && IS_DAX(mapping->host);