rust: page: Add support for vmalloc_to_page

[Abdiel Janulgue <abdiel.janulgue@gmail.com>]

This series aims to add support for pages that are not allocated by an instance of the Page
abstraction, specifically those returned by vmalloc_to_page().

This patch series is sent in the context of developing a Nova driver WIP feature where we
load the the GSP firmware into an sg table [1].

[1] https://gitlab.freedesktop.org/abj/nova-drm

Abdiel Janulgue (3):
  rust: page: replace the page pointer wrapper with Opaque
  rust: page: Extend support to vmalloc_to_page
  rust: page: Add page_slice_to_page

 rust/kernel/page.rs | 111 ++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 102 insertions(+), 9 deletions(-)


base-commit: 673d1648244c3840043e09a784164b38c2e2efb9
-- 
2.34.1