linux-kernel - Re: [PATCH v3 14/16] mm: remove is_hugetlb_entry

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Message-ID: <66178124-ebdf-4e23-b8ca-ed3eb8030c81@lucifer.local>
Date: Thu, 27 Nov 2025 17:45:17 +0000
From: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Christian Borntraeger <borntraeger@...ux.ibm.com>,
        Janosch Frank <frankja@...ux.ibm.com>,
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Subject: Re: [PATCH v3 14/16] mm: remove is_hugetlb_entry_[migration,
 hwpoisoned]()

Hi Andrew,

Please apply this fix.

Thanks, Lorenzo

----8<----
>From fab663ef70a57f71aef762538a9b31deca811791 Mon Sep 17 00:00:00 2001
From: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
Date: Thu, 27 Nov 2025 17:41:49 +0000
Subject: [PATCH] fixup

Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
---
 fs/proc/task_mmu.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index d00ac179d973..81dfc26bfae8 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -2500,9 +2500,11 @@ static void make_uffd_wp_huge_pte(struct vm_area_struct *vma,
 	const unsigned long psize = huge_page_size(hstate_vma(vma));
 	softleaf_t entry;

-	if (huge_pte_none(ptent))
+	if (huge_pte_none(ptent)) {
 		set_huge_pte_at(vma->vm_mm, addr, ptep,
 				make_pte_marker(PTE_MARKER_UFFD_WP), psize);
+		return;
+	}

 	entry = softleaf_from_pte(ptent);
 	if (softleaf_is_hwpoison(entry) || softleaf_is_marker(entry))
--
2.51.2