[PATCH v2 3/3] mm/gup: introduce vaddr_pin_pages_remote(), and invoke it

vaddr_pin_user_pages_remote() is the "vaddr_pin_pages" corresponding variant to get_user_pages_remote(), except that: a) it sets FOLL_PIN, and b) it can handle FOLL_LONGTERM (and the associated vaddr_pin arg). Change process_vm_rw_single_vec() to invoke the new function. Signed-off-by: John

[RFC PATCH v2 3/3] mm/gup: introduce vaddr_pin_pages_remote(), and invoke it

From: John Hubbard vaddr_pin_user_pages_remote() is the "vaddr_pin_pages" corresponding variant to get_user_pages_remote(): it adds the ability to handle FOLL_PIN, FOLL_LONGTERM, or both. Note that the put_user_page*() requirement won't be truly required until all of the call sites have been con