This allows the cast in lowmem_page_address (introduced as a warning fixup to 33dd4e0ec911 "mm: make some struct page's const") to be removed. Propagate const'ness to page_to_section() as well since it is required by __page_to_pfn.
Unified · Split
| @@ -39,7 +39,7 @@ · 38 unmodified lines | ||
| 39 | 39 | }) |
| 40 | 40 | |
| 41 | 41 | #define __page_to_pfn(pg) \ |
| 42 | −({ struct page *__pg = (pg); \ | |
| 42 | +({ const struct page *__pg = (pg); \ | |
| 43 | 43 | struct pglist_data *__pgdat = NODE_DATA(page_to_nid(__pg)); \ |
| 44 | 44 | (unsigned long)(__pg - __pgdat->node_mem_map) + \ |
| 45 | 45 | __pgdat->node_start_pfn; \ |
| @@ -57,7 +57,7 @@ · 11 unmodified lines | ||
| 57 | 57 | * section[i].section_mem_map == mem_map's address - start_pfn; |
| 58 | 58 | */ |
| 59 | 59 | #define __page_to_pfn(pg) \ |
| 60 | −({ struct page *__pg = (pg); \ | |
| 60 | +({ const struct page *__pg = (pg); \ | |
| 61 | 61 | int __sec = page_to_section(__pg); \ |
| 62 | 62 | (unsigned long)(__pg - __section_mem_map_addr(__nr_to_section(__sec))); \ |
| 63 | 63 | }) |
| @@ -685,7 +685,7 @@ static inline void set_page_section(struct page *page, unsigned long section) · 684 unmodified lines | ||
| 685 | 685 | page->flags |= (section & SECTIONS_MASK) << SECTIONS_PGSHIFT; |
| 686 | 686 | } |
| 687 | 687 | |
| 688 | −static inline unsigned long page_to_section(struct page *page) | |
| 688 | +static inline unsigned long page_to_section(const struct page *page) | |
| 689 | 689 | { |
| 690 | 690 | return (page->flags >> SECTIONS_PGSHIFT) & SECTIONS_MASK; |
| 691 | 691 | } |
| @@ -720,7 +720,7 @@ static inline void set_page_links(struct page *page, enum zone_type zone, · 28 unmodified lines | ||
| 720 | 720 | |
| 721 | 721 | static __always_inline void *lowmem_page_address(const struct page *page) |
| 722 | 722 | { |
| 723 | − return __va(PFN_PHYS(page_to_pfn((struct page *)page))); | |
| 723 | + return __va(PFN_PHYS(page_to_pfn(page))); | |
| 724 | 724 | } |
| 725 | 725 | |
| 726 | 726 | #if defined(CONFIG_HIGHMEM) && !defined(WANT_PAGE_VIRTUAL) |