On Wed, 19 Oct 2022 17:17:36 +0800 kernel test robot <lkp@xxxxxxxxx> wrote:
> >> mm/memremap.c:521:6: warning: no previous prototype for 'zone_device_page_init' [-Wmissing-prototypes]
> 521 | void zone_device_page_init(struct page *page)
> | ^~~~~~~~~~~~~~~~~~~~~
huh, sorry, I must have fat-fingered the reject resolution on that one.
--- a/mm/memremap.c~mm-memremap_pages-replace-zone_device_page_init-with-pgmap_request_folios-fix
+++ a/mm/memremap.c
@@ -518,18 +518,6 @@ void free_zone_device_page(struct page *
put_dev_pagemap(page->pgmap);
}
-void zone_device_page_init(struct page *page)
-{
- /*
- * Drivers shouldn't be allocating pages after calling
- * memunmap_pages().
- */
- WARN_ON_ONCE(!percpu_ref_tryget_live(&page->pgmap->ref));
- set_page_count(page, 1);
- lock_page(page);
-}
-EXPORT_SYMBOL_GPL(zone_device_page_init);
-
static __maybe_unused bool folio_span_valid(struct dev_pagemap *pgmap,
struct folio *folio,
int nr_folios)
_
