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author | 2021-11-25 18:15:37 +0100 | |
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committer | 2021-12-20 01:02:27 +0100 | |
commit | 7d4203c13435c0bdae61bf16bbd0408d5b958ade (patch) | |
tree | 7ae59ad086d9903213fc6a87cbe76887a5570ada /include/linux/mm.h | |
parent | Linux 5.16-rc6 (diff) | |
download | linux-7d4203c13435c0bdae61bf16bbd0408d5b958ade.tar.gz linux-7d4203c13435c0bdae61bf16bbd0408d5b958ade.tar.bz2 linux-7d4203c13435c0bdae61bf16bbd0408d5b958ade.zip |
mm: add virt_to_folio() and folio_address()
These two wrappers around their respective struct page variants will be
useful in the following patches.
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Roman Gushchin <guro@fb.com>
Diffstat (limited to 'include/linux/mm.h')
-rw-r--r-- | include/linux/mm.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index a7e4a9e7d807..4a6cf22483da 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -863,6 +863,13 @@ static inline struct page *virt_to_head_page(const void *x) return compound_head(page); } +static inline struct folio *virt_to_folio(const void *x) +{ + struct page *page = virt_to_page(x); + + return page_folio(page); +} + void __put_page(struct page *page); void put_pages_list(struct list_head *pages); @@ -1753,6 +1760,11 @@ void page_address_init(void); #define page_address_init() do { } while(0) #endif +static inline void *folio_address(const struct folio *folio) +{ + return page_address(&folio->page); +} + extern void *page_rmapping(struct page *page); extern struct anon_vma *page_anon_vma(struct page *page); extern pgoff_t __page_file_index(struct page *page); |