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-rw-r--r--mm/memremap.c32
1 files changed, 5 insertions, 27 deletions
diff --git a/mm/memremap.c b/mm/memremap.c
index bee85560a2..9e9fb1972f 100644
--- a/mm/memremap.c
+++ b/mm/memremap.c
@@ -7,6 +7,7 @@
#include <linux/memremap.h>
#include <linux/pfn_t.h>
#include <linux/swap.h>
+#include <linux/mm.h>
#include <linux/mmzone.h>
#include <linux/swapops.h>
#include <linux/types.h>
@@ -422,19 +423,6 @@ void devm_memunmap_pages(struct device *dev, struct dev_pagemap *pgmap)
}
EXPORT_SYMBOL_GPL(devm_memunmap_pages);
-unsigned long vmem_altmap_offset(struct vmem_altmap *altmap)
-{
- /* number of pfns from base where pfn_to_page() is valid */
- if (altmap)
- return altmap->reserve + altmap->free;
- return 0;
-}
-
-void vmem_altmap_free(struct vmem_altmap *altmap, unsigned long nr_pfns)
-{
- altmap->alloc -= nr_pfns;
-}
-
/**
* get_dev_pagemap() - take a new live reference on the dev_pagemap for @pfn
* @pfn: page frame number to lookup page_map
@@ -485,21 +473,11 @@ void free_zone_device_page(struct page *page)
__ClearPageAnonExclusive(page);
/*
- * When a device managed page is freed, the page->mapping field
+ * When a device managed page is freed, the folio->mapping field
* may still contain a (stale) mapping value. For example, the
- * lower bits of page->mapping may still identify the page as an
- * anonymous page. Ultimately, this entire field is just stale
- * and wrong, and it will cause errors if not cleared. One
- * example is:
- *
- * migrate_vma_pages()
- * migrate_vma_insert_page()
- * page_add_new_anon_rmap()
- * __page_set_anon_rmap()
- * ...checks page->mapping, via PageAnon(page) call,
- * and incorrectly concludes that the page is an
- * anonymous page. Therefore, it incorrectly,
- * silently fails to set up the new anon rmap.
+ * lower bits of folio->mapping may still identify the folio as an
+ * anonymous folio. Ultimately, this entire field is just stale
+ * and wrong, and it will cause errors if not cleared.
*
* For other types of ZONE_DEVICE pages, migration is either
* handled differently or not done at all, so there is no need