[PATCH v4 2/3] mm: vmscan: add a helper to identify file-backed executable folios

[Baolin Wang <baolin.wang@linux.alibaba.com>]

Add a helper to identify file-backed executable folios to avoid
duplicate code.

No functional changes.

Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Axel Rasmussen <axelrasmussen@google.com>
---
 mm/vmscan.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 11357b86ba2c..8f0c31a4848e 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -268,6 +268,12 @@ static int sc_swappiness(struct scan_control *sc, struct mem_cgroup *memcg)
 }
 #endif
 
+static inline bool is_exec_file_folio(const struct folio *folio,
+		const vma_flags_t *vma_flags)
+{
+	return vma_flags_test(vma_flags, VMA_EXEC_BIT) && folio_is_file_lru(folio);
+}
+
 static void set_task_reclaim_state(struct task_struct *task,
 				   struct reclaim_state *rs)
 {
@@ -914,7 +920,7 @@ static enum folio_references folio_check_references(struct folio *folio,
 		/*
 		 * Activate file-backed executable folios after first usage.
 		 */
-		if (vma_flags_test(&vma_flags, VMA_EXEC_BIT) && folio_is_file_lru(folio))
+		if (is_exec_file_folio(folio, &vma_flags))
 			return FOLIOREF_ACTIVATE;
 
 		return FOLIOREF_KEEP;
@@ -2117,7 +2123,7 @@ static void shrink_active_list(unsigned long nr_to_scan,
 			 * IO, plus JVM can create lots of anon VM_EXEC folios,
 			 * so we ignore them here.
 			 */
-			if (vma_flags_test(&vma_flags, VMA_EXEC_BIT) && folio_is_file_lru(folio)) {
+			if (is_exec_file_folio(folio, &vma_flags)) {
 				nr_rotated += folio_nr_pages(folio);
 				list_add(&folio->lru, &l_active);
 				continue;
-- 
2.47.3