+ mm-damon-paddr-support-addr_unit-for-damos_pageout-fix.patch added to mm-unstable branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: mm/damon/paddr: use do_div() on i386 for damon_pa_pageout() return value
has been added to the -mm mm-unstable branch.  Its filename is
     mm-damon-paddr-support-addr_unit-for-damos_pageout-fix.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-damon-paddr-support-addr_unit-for-damos_pageout-fix.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@kernel.org>
Subject: mm/damon/paddr: use do_div() on i386 for damon_pa_pageout() return value
Date: Mon, 25 Aug 2025 07:41:33 -0700

Otherwise, __udidi3 linking problem happens on certain configs.

Link: https://lkml.kernel.org/r/20250825151205.36288-1-sj@kernel.org
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202508241831.EKwdwXZL-lkp@intel.com/
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: ze zuo <zuoze1@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/damon/paddr.c |   14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

--- a/mm/damon/paddr.c~mm-damon-paddr-support-addr_unit-for-damos_pageout-fix
+++ a/mm/damon/paddr.c
@@ -135,6 +135,18 @@ static bool damon_pa_invalid_damos_folio
 	return false;
 }
 
+/* convert physical address to core-layer address */
+static unsigned long damon_pa_core_addr(phys_addr_t pa,
+		unsigned long addr_unit)
+{
+#ifdef __i386__
+	do_div(pa, addr_unit);
+	return pa;
+#else
+	return pa / addr_unit;
+#endif
+}
+
 static unsigned long damon_pa_pageout(struct damon_region *r,
 		unsigned long addr_unit, struct damos *s,
 		unsigned long *sz_filter_passed)
@@ -190,7 +202,7 @@ put_folio:
 	applied = reclaim_pages(&folio_list);
 	cond_resched();
 	s->last_applied = folio;
-	return applied * PAGE_SIZE / addr_unit;
+	return damon_pa_core_addr(applied * PAGE_SIZE, addr_unit);
 }
 
 static inline unsigned long damon_pa_mark_accessed_or_deactivate(
_

Patches currently in -mm which might be from sj@kernel.org are

mm-zswap-store-page_size-compression-failed-page-as-is.patch
mm-zswap-store-page_size-compression-failed-page-as-is-fix.patch
mm-zswap-store-page_size-compression-failed-page-as-is-v5.patch
mm-damon-core-add-damon_ctx-addr_unit.patch
mm-damon-paddr-support-addr_unit-for-access-monitoring.patch
mm-damon-paddr-support-addr_unit-for-damos_pageout.patch
mm-damon-paddr-support-addr_unit-for-damos_pageout-fix.patch
mm-damon-paddr-support-addr_unit-for-damos_lru_prio.patch
mm-damon-paddr-support-addr_unit-for-migrate_hotcold.patch
mm-damon-paddr-support-addr_unit-for-migrate_hotcold-fix.patch
mm-damon-paddr-support-addr_unit-for-damos_stat.patch
mm-damon-sysfs-implement-addr_unit-file-under-context-dir.patch
docs-mm-damon-design-document-address-unit-parameter.patch
docs-admin-guide-mm-damon-usage-document-addr_unit-file.patch
docs-abi-damon-document-addr_unit-file.patch