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| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2023-01-11 14:28:54 +0000 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-02-02 22:32:56 -0800 |
| commit | 4d510f3da4c216d4c2695395f67aec38e2aa6cc7 (patch) | |
| tree | e726b8fb8ac10a96c739baa733f526fd5c083e5b /mm/folio-compat.c | |
| parent | eb01a2ad7e9cba1b9dd131edc5a26ffbda90a5ed (diff) | |
| download | lwn-4d510f3da4c216d4c2695395f67aec38e2aa6cc7.tar.gz lwn-4d510f3da4c216d4c2695395f67aec38e2aa6cc7.zip | |
mm: add folio_add_new_anon_rmap()
In contrast to other rmap functions, page_add_new_anon_rmap() is always
called with a freshly allocated page. That means it can't be called with
a tail page. Turn page_add_new_anon_rmap() into folio_add_new_anon_rmap()
and add a page_add_new_anon_rmap() wrapper. Callers can be converted
individually.
[akpm@linux-foundation.org: fix NOMMU build. page_add_new_anon_rmap() requires CONFIG_MMU]
[willy@infradead.org: folio-compat.c needs rmap.h]
Link: https://lkml.kernel.org/r/20230111142915.1001531-9-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/folio-compat.c')
| -rw-r--r-- | mm/folio-compat.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/mm/folio-compat.c b/mm/folio-compat.c index 69ed25790c68..18c48b557926 100644 --- a/mm/folio-compat.c +++ b/mm/folio-compat.c @@ -6,6 +6,7 @@ #include <linux/migrate.h> #include <linux/pagemap.h> +#include <linux/rmap.h> #include <linux/swap.h> #include "internal.h" @@ -123,3 +124,13 @@ void putback_lru_page(struct page *page) { folio_putback_lru(page_folio(page)); } + +#ifdef CONFIG_MMU +void page_add_new_anon_rmap(struct page *page, struct vm_area_struct *vma, + unsigned long address) +{ + VM_BUG_ON_PAGE(PageTail(page), page); + + return folio_add_new_anon_rmap((struct folio *)page, vma, address); +} +#endif |