fs-proc-use-softleaf_has_pfn-in-pagemap-pmd-walker.patch removed from -mm tree

The quilt patch titled
Subject: fs/proc: use softleaf_has_pfn() in pagemap PMD walker
has been removed from the -mm tree. Its filename was
fs-proc-use-softleaf_has_pfn-in-pagemap-pmd-walker.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: Usama Arif <[email protected]>
Subject: fs/proc: use softleaf_has_pfn() in pagemap PMD walker
Date: Mon, 6 Jul 2026 04:42:05 -0700

pagemap_pmd_range_thp() assumes that every non-present PMD is a migration entry and unconditionally calls softleaf_to_page(). This will crash on any non-present PMD type that does not encode a PFN, such as the upcoming PMD-level swap entries.

Guard the page lookup with softleaf_has_pfn(), matching how pte_to_pagemap_entry() already handles non-present PTEs.

---

 fs/proc/task_mmu.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

@@ -2129,7 +2129,8 @@ static int pagemap_pmd_range_thp(pmd_t *
 			flags |= PM_SOFT_DIRTY;
 		if (pmd_swp_uffd_wp(pmd))
 			flags |= PM_UFFD_WP;
-		page = softleaf_to_page(entry);
+		if (softleaf_has_pfn(entry))
+			page = softleaf_to_page(entry);
 	}
 
 	if (page) {

_

Patches currently in -mm which might be from [email protected] are

mm-mempolicy-skip-non-present-pmds-when-queueing-folios.patch mm-madvise-skip-device-private-pmds-in-cold-and-pageout-walks.patch mm-huge_memory-skip-device-private-pmds-in-madvise_free_huge_pmd.patch mm-vmstat-mm-memcontrol-add-_monotonic-vmstat-readers.patch mm-vmscan-reduce-lru_lock-contention-via-vmstat-derived-scan-balance-cost.patch