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authorMatthew Wilcox (Oracle) <willy@infradead.org>2021-05-02 23:22:52 -0400
committerMatthew Wilcox (Oracle) <willy@infradead.org>2021-10-18 07:49:40 -0400
commitcd78ab11a8810dd297f4751d17cc53e3dce36024 (patch)
treed7a52434d892e64a425ce381ca5f426e82f92c9b /mm
parent25ff8b15537dfa0e1a62d55cfcc48f3c8bd8a76c (diff)
downloadlinux-next-cd78ab11a8810dd297f4751d17cc53e3dce36024.tar.gz
mm/writeback: Add folio_redirty_for_writepage()
Reimplement redirty_page_for_writepage() as a wrapper around folio_redirty_for_writepage(). Account the number of pages in the folio, add kernel-doc and move the prototype to writeback.h. Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: David Howells <dhowells@redhat.com> Acked-by: Vlastimil Babka <vbabka@suse.cz>
Diffstat (limited to 'mm')
-rw-r--r--mm/folio-compat.c7
-rw-r--r--mm/page-writeback.c30
2 files changed, 27 insertions, 10 deletions
diff --git a/mm/folio-compat.c b/mm/folio-compat.c
index 39f5a8d963b1..c1e01bc36d32 100644
--- a/mm/folio-compat.c
+++ b/mm/folio-compat.c
@@ -95,3 +95,10 @@ bool clear_page_dirty_for_io(struct page *page)
return folio_clear_dirty_for_io(page_folio(page));
}
EXPORT_SYMBOL(clear_page_dirty_for_io);
+
+bool redirty_page_for_writepage(struct writeback_control *wbc,
+ struct page *page)
+{
+ return folio_redirty_for_writepage(wbc, page_folio(page));
+}
+EXPORT_SYMBOL(redirty_page_for_writepage);
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 7ef904363fb7..a0c35a9d8029 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -2575,21 +2575,31 @@ void folio_account_redirty(struct folio *folio)
}
EXPORT_SYMBOL(folio_account_redirty);
-/*
- * When a writepage implementation decides that it doesn't want to write this
- * page for some reason, it should redirty the locked page via
- * redirty_page_for_writepage() and it should then unlock the page and return 0
+/**
+ * folio_redirty_for_writepage - Decline to write a dirty folio.
+ * @wbc: The writeback control.
+ * @folio: The folio.
+ *
+ * When a writepage implementation decides that it doesn't want to write
+ * @folio for some reason, it should call this function, unlock @folio and
+ * return 0.
+ *
+ * Return: True if we redirtied the folio. False if someone else dirtied
+ * it first.
*/
-int redirty_page_for_writepage(struct writeback_control *wbc, struct page *page)
+bool folio_redirty_for_writepage(struct writeback_control *wbc,
+ struct folio *folio)
{
- int ret;
+ bool ret;
+ long nr = folio_nr_pages(folio);
+
+ wbc->pages_skipped += nr;
+ ret = filemap_dirty_folio(folio->mapping, folio);
+ folio_account_redirty(folio);
- wbc->pages_skipped++;
- ret = __set_page_dirty_nobuffers(page);
- account_page_redirty(page);
return ret;
}
-EXPORT_SYMBOL(redirty_page_for_writepage);
+EXPORT_SYMBOL(folio_redirty_for_writepage);
/**
* folio_mark_dirty - Mark a folio as being modified.