[merged mm-stable] mm-mglru-make-lru-folio-prefetch-helper-an-inline-function.patch removed from -mm tree

[merged mm-stable] mm-mglru-make-lru-folio-prefetch-helper-an-inline-function.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm/mglru: make LRU folio prefetch helper an inline function
has been removed from the -mm tree.  Its filename was
     mm-mglru-make-lru-folio-prefetch-helper-an-inline-function.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: "Barry Song (Xiaomi)" <baohua@kernel.org>
Subject: mm/mglru: make LRU folio prefetch helper an inline function
Date: Wed, 2 Sep 2026 07:24:19 +0800

`prefetchw_prev_lru_folio()` is currently implemented as a macro with a
potentially unused argument.  This makes the helper harder to read and can
also trigger checkpatch warnings about unused macro arguments.

Make it a `static inline` function and remove the unnecessary `_field`
argument.  The helper always prefetches the previous folio's `flags`, so
there is no need to make the field configurable.

Link: https://lore.kernel.org/20260901232421.40157-6-baohua@kernel.org
Signed-off-by: Barry Song (Xiaomi) <baohua@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Tested-by: Xueyuan Chen <xueyuan.chen21@gmail.com>
Reviewed-by: Lian Wang <lianux.mm@gmail.com>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: David Hildenbrand <david@kernel.org>
Cc: David Stevens <stevensd@chromium.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kunwu Chan <kunwu.chan@gmail.com>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Ridong Chen <ridong.chen@linux.dev>
Cc: Shakeel Butt <shakeel.butt@linux.dev>
Cc: Wei Xu <weixugc@google.com>
Cc: Yuanchu Xie <yuanchu@google.com>
---

 mm/vmscan.c |   26 +++++++++++++++-----------
 1 file changed, 15 insertions(+), 11 deletions(-)

--- a/mm/vmscan.c~mm-mglru-make-lru-folio-prefetch-helper-an-inline-function
+++ a/mm/vmscan.c
@@ -182,17 +182,21 @@ struct scan_control {
 };
 
 #ifdef ARCH_HAS_PREFETCHW
-#define prefetchw_prev_lru_folio(_folio, _base, _field)			\
-	do {								\
-		if ((_folio)->lru.prev != _base) {			\
-			struct folio *prev;				\
-									\
-			prev = lru_to_folio(&(_folio->lru));		\
-			prefetchw(&prev->_field);			\
-		}							\
-	} while (0)
+static inline void prefetchw_prev_lru_folio(struct folio *folio,
+		struct list_head *base)
+{
+	if (folio->lru.prev != base) {
+		struct folio *prev;
+
+		prev = lru_to_folio(&folio->lru);
+		prefetchw(&prev->flags);
+	}
+}
 #else
-#define prefetchw_prev_lru_folio(_folio, _base, _field) do { } while (0)
+static inline void prefetchw_prev_lru_folio(struct folio *folio,
+		struct list_head *base)
+{
+}
 #endif
 
 /*
@@ -1700,7 +1704,7 @@ static unsigned long isolate_lru_folios(
 		struct folio *folio;
 
 		folio = lru_to_folio(src);
-		prefetchw_prev_lru_folio(folio, src, flags);
+		prefetchw_prev_lru_folio(folio, src);
 
 		nr_pages = folio_nr_pages(folio);
 		total_scan += nr_pages;
_

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

mm-mglru-restore-accidentally-removed-seq-max_seq-check.patch