The patch titled
Subject: dax: remove access to page->index
has been added to the -mm mm-unstable branch. Its filename is
dax-remove-access-to-page-index.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/dax-remove-access-to-page-index.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
Subject: dax: remove access to page->index
Date: Mon, 16 Dec 2024 15:53:55 +0000
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.
Link: https://lkml.kernel.org/r/20241216155408.8102-1-willy@xxxxxxxxxxxxx
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Reviewed-by: Jane Chu <jane.chu@xxxxxxxxxx>
Reviewed-by: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Alistair Popple <apopple@xxxxxxxxxx>
Cc: Dave Jiang <dave.jiang@xxxxxxxxx>
Cc: Vishal Verma <vishal.l.verma@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/dax/device.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
--- a/drivers/dax/device.c~dax-remove-access-to-page-index
+++ a/drivers/dax/device.c
@@ -89,14 +89,13 @@ static void dax_set_mapping(struct vm_fa
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;
}
}
_
Patches currently in -mm which might be from willy@xxxxxxxxxxxxx are
dax-remove-access-to-page-index.patch
dax-use-folios-more-widely-within-dax.patch
