Re: [PATCH 05/10] mm/mremap: use an explicit uffd failure path for mremap

[Lorenzo Stoakes <lorenzo.stoakes@oracle.com>]

Hi Andrew,

I missed the !CONFIG_USERFAULTFD stub, could you apply the attached fix-patch?

Thanks!

----8<----
From 048bfb6ee415843bd584c64a2c6e6be9b1114962 Mon Sep 17 00:00:00 2001
From: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Date: Mon, 7 Jul 2025 11:15:18 +0100
Subject: [PATCH] add missing mremap_userfaultfd_fail() stub

This covers the !CONFIG_USERFAULTFD case.

Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
---
 include/linux/userfaultfd_k.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/linux/userfaultfd_k.h b/include/linux/userfaultfd_k.h
index 6680a4de40b3..c0e716aec26a 100644
--- a/include/linux/userfaultfd_k.h
+++ b/include/linux/userfaultfd_k.h
@@ -372,6 +372,10 @@ static inline void mremap_userfaultfd_complete(struct vm_userfaultfd_ctx *ctx,
 {
 }

+static inline void mremap_userfaultfd_fail(struct vm_userfaultfd_ctx *ctx)
+{
+}
+
 static inline bool userfaultfd_remove(struct vm_area_struct *vma,
 				      unsigned long start,
 				      unsigned long end)
--
2.50.0