Commit 3615e106 authored Aug 22, 2025 by Wei Yang Committed by Andrew Morton Sep 13, 2025

mm/khugepaged: use list_xxx() helper to improve readability

In general, khugepaged_scan_mm_slot() iterates khugepaged_scan.mm_head list
to get a mm_struct for collapse memory.

Use list_xxx() helper would be more obvious to the list iteration
operation.

No functional change.

Link: https://lkml.kernel.org/r/20250822025732.9025-1-richard.weiyang@gmail.com


Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Acked-by: SeongJae Park <sj@kernel.org>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Reviewed-by: Dev Jain <dev.jain@arm.com>
Cc: Barry Song <baohua@kernel.org>
Cc: Mariano Pache <npache@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Wei Yang <richard.weiyang@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

parent a7498388

mm/khugepaged.c

+3 −4

Original line number	Diff line number	Diff line
		@@ -2402,7 +2402,7 @@ static unsigned int khugepaged_scan_mm_slot(unsigned int pages, int *result,
		mm_slot = khugepaged_scan.mm_slot;
		slot = &mm_slot->slot;
		} else {
		slot = list_entry(khugepaged_scan.mm_head.next,
		slot = list_first_entry(&khugepaged_scan.mm_head,
		struct mm_slot, mm_node);
		mm_slot = mm_slot_entry(slot, struct khugepaged_mm_slot, slot);
		khugepaged_scan.address = 0;
		@@ -2515,9 +2515,8 @@ static unsigned int khugepaged_scan_mm_slot(unsigned int pages, int *result,
		* khugepaged runs here, khugepaged_exit will find
		* mm_slot not pointing to the exiting mm.
		*/
		if (slot->mm_node.next != &khugepaged_scan.mm_head) {
		slot = list_entry(slot->mm_node.next,
		struct mm_slot, mm_node);
		if (!list_is_last(&slot->mm_node, &khugepaged_scan.mm_head)) {
		slot = list_next_entry(slot, mm_node);
		khugepaged_scan.mm_slot =
		mm_slot_entry(slot, struct khugepaged_mm_slot, slot);
		khugepaged_scan.address = 0;