The behaviour of pXdp_get() will change with generic compile-time folded page tables. To prepare for that, replace passing the address of a stack copy of a pud/pmd to walk_pmd/pte_range() with passing the pud/pmd pointer directly so that makes allowing folded entries to be ignored and check the concurrent access proeprly otherwise pXd_same() would return always true.
There should be no functional change. Reviewed-by: Muhammad Usama Anjum <[email protected]> Signed-off-by: Yeoreum Yun <[email protected]> --- mm/vmscan.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index 4d51b0d8e287..4e98088becab 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -3777,7 +3777,7 @@ static void walk_pmd_range(pud_t *pud, unsigned long start, unsigned long end, walk->mm_stats[MM_NONLEAF_FOUND]++; - if (!walk_pte_range(&val, addr, next, args)) + if (!walk_pte_range(pmd + i, addr, next, args)) continue; walk->mm_stats[MM_NONLEAF_ADDED]++; @@ -3813,7 +3813,7 @@ static int walk_pud_range(p4d_t *p4d, unsigned long start, unsigned long end, if (!pud_present(val) || WARN_ON_ONCE(pud_leaf(val))) continue; - walk_pmd_range(&val, addr, next, args); + walk_pmd_range(pud + i, addr, next, args); if (need_resched() || walk->batched >= MAX_LRU_BATCH) { end = (addr | ~PUD_MASK) + 1; -- 2.43.0
