The patch titled
Subject: mm: add missing mmu_notifier_clear_young for !MMU_NOTIFIER
has been added to the -mm mm-unstable branch. Its filename is
mm-add-missing-mmu_notifier_clear_young-for-mmu_notifier.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-add-missing-mmu_notifier_clear_young-for-mmu_notifier.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: James Houghton <jthoughton@xxxxxxxxxx>
Subject: mm: add missing mmu_notifier_clear_young for !MMU_NOTIFIER
Date: Mon, 21 Oct 2024 16:02:12 +0000
Remove the now unnecessary ifdef in mm/damon/vaddr.c as well.
Link: https://lkml.kernel.org/r/20241021160212.9935-1-jthoughton@xxxxxxxxxx
Signed-off-by: James Houghton <jthoughton@xxxxxxxxxx>
Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
Acked-by: David Hildenbrand <david@xxxxxxxxxx>
Reviewed-by: SeongJae Park <sj@xxxxxxxxxx>
Reviewed-by: Oscar Salvador <osalvador@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/mmu_notifier.h | 7 +++++++
mm/damon/vaddr.c | 2 --
2 files changed, 7 insertions(+), 2 deletions(-)
--- a/include/linux/mmu_notifier.h~mm-add-missing-mmu_notifier_clear_young-for-mmu_notifier
+++ a/include/linux/mmu_notifier.h
@@ -606,6 +606,13 @@ static inline int mmu_notifier_clear_flu
return 0;
}
+static inline int mmu_notifier_clear_young(struct mm_struct *mm,
+ unsigned long start,
+ unsigned long end)
+{
+ return 0;
+}
+
static inline int mmu_notifier_test_young(struct mm_struct *mm,
unsigned long address)
{
--- a/mm/damon/vaddr.c~mm-add-missing-mmu_notifier_clear_young-for-mmu_notifier
+++ a/mm/damon/vaddr.c
@@ -353,11 +353,9 @@ static void damon_hugetlb_mkold(pte_t *p
set_huge_pte_at(mm, addr, pte, entry, psize);
}
-#ifdef CONFIG_MMU_NOTIFIER
if (mmu_notifier_clear_young(mm, addr,
addr + huge_page_size(hstate_vma(vma))))
referenced = true;
-#endif /* CONFIG_MMU_NOTIFIER */
if (referenced)
folio_set_young(folio);
_
Patches currently in -mm which might be from jthoughton@xxxxxxxxxx are
mm-add-missing-mmu_notifier_clear_young-for-mmu_notifier.patch
