David Hildenbrand [off-list ref] writes:

On 07.08.24 14:41, Michael Ellerman wrote:

quoted

Add an optional close() callback to struct vm_special_mapping. It will
be used, by powerpc at least, to handle unmapping of the VDSO.

Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
  include/linux/mm_types.h | 2 ++
  mm/mmap.c                | 3 +++
  2 files changed, 5 insertions(+)

diff --git a/mm/mmap.c b/mm/mmap.c
index d0dfc85b209b..24bd6aa9155c 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c

@@ -3624,6 +3624,9 @@ static vm_fault_t special_mapping_fault(struct vm_fault *vmf);
   */
  static void special_mapping_close(struct vm_area_struct *vma)
  {
+	const struct vm_special_mapping *sm = vma->vm_private_data;

I'm old-fashioned, I enjoy an empty line here ;)

Ack.

quoted

+	if (sm->close)
+		sm->close(sm, vma);

Reviewed-by: David Hildenbrand <redacted>

Thanks.

cheers