fs/dax: Clarify nr_pages to dax_direct_access()

dax_direct_access() takes a number of pages.  PHYS_PFN(PAGE_SIZE) is a
very round about way to specify '1'.

Change the nr_pages parameter to the explicit value of '1'.

Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Link: https://lore.kernel.org/r/20210525172428.3634316-3-ira.weiny@intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

diff --git a/fs/dax.c b/fs/dax.c
index 62352cbcf0f40db11ea9f04a4b4e69bba22eba54..8ce3a7e147a804ac4bd956f062d8033c9234aee4 100644 (file)
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -721,7 +721,7 @@ static int copy_cow_page_dax(struct block_device *bdev, struct dax_device *dax_d
                return rc;
 
        id = dax_read_lock();
-       rc = dax_direct_access(dax_dev, pgoff, PHYS_PFN(PAGE_SIZE), &kaddr, NULL);
+       rc = dax_direct_access(dax_dev, pgoff, 1, &kaddr, NULL);
        if (rc < 0) {
                dax_read_unlock(id);
                return rc;