[PATCH 1/2] dax: Remove access to page->index

[Matthew Wilcox (Oracle)]

This looks like a complete mess (why are we setting page->index at page
fault time?), but I no longer care about DAX, and there's no reason to
let DAX hold us back from removing page->index.

Signed-off-by: Matthew Wilcox (Oracle) <wi...@infradead.org>
---
 drivers/dax/device.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/dax/device.c b/drivers/dax/device.c
index 6d74e62bbee0..bc871a34b9cd 100644
--- a/drivers/dax/device.c
+++ b/drivers/dax/device.c
@@ -89,14 +89,13 @@ static void dax_set_mapping(struct vm_fault *vmf, pfn_t pfn,
                        ALIGN_DOWN(vmf->address, fault_size));
 
        for (i = 0; i < nr_pages; i++) {
-               struct page *page = pfn_to_page(pfn_t_to_pfn(pfn) + i);
+               struct folio *folio = pfn_folio(pfn_t_to_pfn(pfn) + i);
 
-               page = compound_head(page);
-               if (page->mapping)
+               if (folio->mapping)
                        continue;
 
-               page->mapping = filp->f_mapping;
-               page->index = pgoff + i;
+               folio->mapping = filp->f_mapping;
+               folio->index = pgoff + i;
        }
 }
 
-- 
2.45.2