The patch titled
Subject: mm: pgtable: correct the wrong comment about ptdesc->__page_flags
has been added to the -mm mm-unstable branch. Its filename is
mm-pgtable-correct-the-wrong-comment-about-ptdesc-__page_flags.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-pgtable-correct-the-wrong-comment-about-ptdesc-__page_flags.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: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>
Subject: mm: pgtable: correct the wrong comment about ptdesc->__page_flags
Date: Mon, 4 Mar 2024 19:07:18 +0800
Patch series "minor fixes and supplement for ptdesc".
In this series, the [PATCH 1/3] and [PATCH 2/3] are fixes for some issues
discovered during code inspection.
The [PATCH 3/3] is a supplement to ptdesc conversion in s390, I don't know
why this is not done in the commit 6326c26c1514 ("s390: convert various
pgalloc functions to use ptdescs"), maybe I missed something. And since I
don't have an s390 environment, I hope kernel test robot can help compile
and test, and this is why I did not fold [PATCH 2/3] and [PATCH 3/3] into
one patch.
This patch (of 3):
The commit 32cc0b7c9d50 ("powerpc: add pte_free_defer() for pgtables
sharing page") introduced the use of PageActive flag to page table
fragments tracking, so the ptdesc->__page_flags is not unused, so correct
the wrong comment.
Link: https://lkml.kernel.org/r/cover.1709541697.git.zhengqi.arch@xxxxxxxxxxxxx
Link: https://lkml.kernel.org/r/cc42d5915fd98fd802f920de243f535efcfe01db.1709541697.git.zhengqi.arch@xxxxxxxxxxxxx
Signed-off-by: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Mike Rapoport (IBM) <rppt@xxxxxxxxxx>
Cc: Muchun Song <muchun.song@xxxxxxxxx>
Cc: Vishal Moola (Oracle) <vishal.moola@xxxxxxxxx>
Cc: Christian Borntraeger <borntraeger@xxxxxxxxxxxxx>
Cc: Claudio Imbrenda <imbrenda@xxxxxxxxxxxxx>
Cc: Janosch Frank <frankja@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/mm_types.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/include/linux/mm_types.h~mm-pgtable-correct-the-wrong-comment-about-ptdesc-__page_flags
+++ a/include/linux/mm_types.h
@@ -419,7 +419,7 @@ FOLIO_MATCH(compound_head, _head_2a);
/**
* struct ptdesc - Memory descriptor for page tables.
- * @__page_flags: Same as page flags. Unused for page tables.
+ * @__page_flags: Same as page flags. Powerpc only.
* @pt_rcu_head: For freeing page table pages.
* @pt_list: List of used page tables. Used for s390 and x86.
* @_pt_pad_1: Padding that aliases with page's compound head.
_
Patches currently in -mm which might be from zhengqi.arch@xxxxxxxxxxxxx are
mm-userfaultfd-fix-unexpected-change-to-src_folio-when-uffdio_move-fails.patch
mm-pgtable-correct-the-wrong-comment-about-ptdesc-__page_flags.patch
mm-pgtable-add-missing-pt_index-to-struct-ptdesc.patch
s390-supplement-for-ptdesc-conversion.patch
