+ replace-free-hugepage-folios-after-migration-fix-2.patch added to mm-unstable branch

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The patch titled
     Subject: mm/hugetlb: define replace_free_hugepage_folios() on CONFIG_HUGETLB_PAGE=n as static inline
has been added to the -mm mm-unstable branch.  Its filename is
     replace-free-hugepage-folios-after-migration-fix-2.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/replace-free-hugepage-folios-after-migration-fix-2.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: SeongJae Park <sj@xxxxxxxxxx>
Subject: mm/hugetlb: define replace_free_hugepage_folios() on CONFIG_HUGETLB_PAGE=n as static inline
Date: Thu, 19 Dec 2024 10:37:53 -0800

Commit fba5261e0039 ("mm: replace free hugepage folios after migration")
on mm-unstable that also available at
https://lkml.kernel.org/r/1734503588-16254-1-git-send-email-yangge1116@xxxxxxx
breaks build when CONFIG_HUGETLB_PAGE=n as below, since
replace_free_hugepage_folios() is defined on the header as non-inline. 
Fix it.

    ./tools/testing/kunit/kunit.py run --kunitconfig mm/damon/tests --build_dir ../kunit.out
    [...]
    ld: io_uring/rsrc.o: in function `replace_free_hugepage_folios':
    rsrc.c:(.text+0x160): multiple definition of `replace_free_hugepage_folios'; kernel/fork.o:fork.c:(.text+0xc30): first defined here
    [...]
    make: *** [Makefile:251: __sub-make] Error 2

Link: https://lkml.kernel.org/r/20241219183753.62922-1-sj@xxxxxxxxxx
Fixes: fba5261e0039 ("mm: replace free hugepage folios after migration")
Signed-off-by: SeongJae Park <sj@xxxxxxxxxx>
Cc: Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Muchun Song <muchun.song@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 include/linux/hugetlb.h |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/include/linux/hugetlb.h~replace-free-hugepage-folios-after-migration-fix-2
+++ a/include/linux/hugetlb.h
@@ -1060,7 +1060,8 @@ static inline int isolate_or_dissolve_hu
 	return -ENOMEM;
 }
 
-int replace_free_hugepage_folios(unsigned long start_pfn, unsigned long end_pfn)
+static inline int replace_free_hugepage_folios(unsigned long start_pfn,
+		unsigned long end_pfn)
 {
 	return 0;
 }
_

Patches currently in -mm which might be from sj@xxxxxxxxxx are

samples-add-a-skeleton-of-a-sample-damon-module-for-working-set-size-estimation.patch
samples-damon-wsse-start-and-stop-damon-as-the-user-requests.patch
samples-damon-wsse-implement-working-set-size-estimation-and-logging.patch
samples-damon-introduce-a-skeleton-of-a-smaple-damon-module-for-proactive-reclamation.patch
samples-damon-prcl-implement-schemes-setup.patch
replace-free-hugepage-folios-after-migration-fix-2.patch





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