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authorVivek Goyal <vgoyal@redhat.com>2020-02-28 17:34:56 +0100
committerDan Williams <dan.j.williams@intel.com>2020-04-03 04:15:03 +0200
commit4f3b4f161d7a070d2181dbcf7fbd97c7631d5c24 (patch)
tree21bbf50c24f916831cfc041fcbcc17aa42dca1d9 /fs/dax.c
parentdax: Use new dax zero page method for zeroing a page (diff)
downloadlinux-4f3b4f161d7a070d2181dbcf7fbd97c7631d5c24.tar.xz
linux-4f3b4f161d7a070d2181dbcf7fbd97c7631d5c24.zip
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 'fs/dax.c')
-rw-r--r--fs/dax.c16
1 files changed, 8 insertions, 8 deletions
diff --git a/fs/dax.c b/fs/dax.c
index 98ba3756163a..11b16729b86f 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -1038,10 +1038,10 @@ static vm_fault_t dax_load_hole(struct xa_state *xas,
return ret;
}
-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)
{
+ sector_t sector = iomap_sector(iomap, pos & PAGE_MASK);
pgoff_t pgoff;
long rc, id;
void *kaddr;
@@ -1052,16 +1052,17 @@ int __dax_zero_page_range(struct block_device *bdev,
IS_ALIGNED(size, PAGE_SIZE))
page_aligned = true;
- 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();
if (page_aligned)
- rc = dax_zero_page_range(dax_dev, pgoff, size >> PAGE_SHIFT);
+ rc = dax_zero_page_range(iomap->dax_dev, pgoff,
+ size >> PAGE_SHIFT);
else
- rc = dax_direct_access(dax_dev, pgoff, 1, &kaddr, NULL);
+ rc = dax_direct_access(iomap->dax_dev, pgoff, 1, &kaddr, NULL);
if (rc < 0) {
dax_read_unlock(id);
return rc;
@@ -1069,12 +1070,11 @@ int __dax_zero_page_range(struct block_device *bdev,
if (!page_aligned) {
memset(kaddr + offset, 0, size);
- dax_flush(dax_dev, kaddr + offset, size);
+ dax_flush(iomap->dax_dev, kaddr + offset, size);
}
dax_read_unlock(id);
return 0;
}
-EXPORT_SYMBOL_GPL(__dax_zero_page_range);
static loff_t
dax_iomap_actor(struct inode *inode, loff_t pos, loff_t length, void *data,