[PATCH v11 2/7] userfaultfd: Define dummy uffd_wp_range()

Muhammad Usama Anjum
2023-03-09T14:01:03Z

Define uffd_wp_range() for the cases when CONFIG_USERFAULTFD isn't set.

Signed-off-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
---
include/linux/userfaultfd_k.h | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/include/linux/userfaultfd_k.h b/include/linux/userfaultfd_k.h
index b680c0ec8b85..fd1a1ecdb5f6 100644
--- a/include/linux/userfaultfd_k.h
+++ b/include/linux/userfaultfd_k.h
@@ -182,6 +182,14 @@ extern int userfaultfd_wp_async(struct vm_area_struct *vma);

#else /* CONFIG_USERFAULTFD */

+extern inline long uffd_wp_range(struct mm_struct *dst_mm,
+ struct vm_area_struct *vma,
+ unsigned long start, unsigned long len,
+ bool enable_wp)
+{
+ return 0;
+}
+
/* mm helpers */
static inline vm_fault_t handle_userfault(struct vm_fault *vmf,
unsigned long reason)
--
2.39.2