The patch titled
Subject: mm/vmalloc.c: support HIGHMEM pages in vmap_pages_range_noflush()
has been added to the -mm mm-unstable branch. Its filename is
support-highmem-pages-in-vmap_pages_range_noflush.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/support-highmem-pages-in-vmap_pages_range_noflush.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 <willy@xxxxxxxxxxxxx>
Subject: mm/vmalloc.c: support HIGHMEM pages in vmap_pages_range_noflush()
Date: Thu, 18 Aug 2022 22:07:41 +0100
If the pages being mapped are in HIGHMEM, page_address() returns NULL.
This probably wasn't noticed before because there aren't currently any
architectures with HAVE_ARCH_HUGE_VMALLOC and HIGHMEM, but it's simpler to
call page_to_phys() and futureproofs us against such configurations
existing.
Link: https://lkml.kernel.org/r/Yv6qHc6e+m7TMWhi@xxxxxxxxxxxxxxxxxxxx
Fixes: 121e6f3258fe ("mm/vmalloc: hugepage vmalloc mappings")
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Uladzislau Rezki <urezki@xxxxxxxxx>
Cc: Nicholas Piggin <npiggin@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmalloc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/vmalloc.c~support-highmem-pages-in-vmap_pages_range_noflush
+++ a/mm/vmalloc.c
@@ -590,7 +590,7 @@ int vmap_pages_range_noflush(unsigned lo
int err;
err = vmap_range_noflush(addr, addr + (1UL << page_shift),
- __pa(page_address(pages[i])), prot,
+ page_to_phys(pages[i]), prot,
page_shift);
if (err)
return err;
_
Patches currently in -mm which might be from willy@xxxxxxxxxxxxx are
support-highmem-pages-in-vmap_pages_range_noflush.patch
