The patch titled
Subject: mm/swapfile: delete outdated pte_offset_map() comment
has been added to the -mm mm-unstable branch. Its filename is
mm-swapfile-delete-outdated-pte_offset_map-comment.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-swapfile-delete-outdated-pte_offset_map-comment.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Hugh Dickins <hughd@xxxxxxxxxx>
Subject: mm/swapfile: delete outdated pte_offset_map() comment
Date: Mon, 19 Jun 2023 23:50:00 -0700 (PDT)
Delete a triply out-of-date comment from add_swap_count_continuation():
1. vmalloc_to_page() changed from pte_offset_map() to pte_offset_kernel()
2. pte_offset_map() changed from using kmap_atomic() to kmap_local_page()
3. kmap_atomic() changed from using fixed FIX_KMAP addresses in 2.6.37.
Link: https://lkml.kernel.org/r/9022632b-ba9d-8cb0-c25-4be9786481b5@xxxxxxxxxx
Signed-off-by: Hugh Dickins <hughd@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/swapfile.c | 5 -----
1 file changed, 5 deletions(-)
--- a/mm/swapfile.c~mm-swapfile-delete-outdated-pte_offset_map-comment
+++ a/mm/swapfile.c
@@ -3456,11 +3456,6 @@ int add_swap_count_continuation(swp_entr
goto out;
}
- /*
- * We are fortunate that although vmalloc_to_page uses pte_offset_map,
- * no architecture is using highmem pages for kernel page tables: so it
- * will not corrupt the GFP_ATOMIC caller's atomic page table kmaps.
- */
head = vmalloc_to_page(si->swap_map + offset);
offset &= ~PAGE_MASK;
_
Patches currently in -mm which might be from hughd@xxxxxxxxxx are
mm-swapfile-delete-outdated-pte_offset_map-comment.patch
