linux-kernel - [PATCH v2 2/5] mmzone: Introduce folio

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Date:   Tue, 13 Jun 2023 19:13:09 -0700
From:   "Vishal Moola (Oracle)" <vishal.moola@...il.com>
To:     akpm@...ux-foundation.org
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        "Vishal Moola (Oracle)" <vishal.moola@...il.com>,
        Matthew Wilcox <willy@...radead.org>
Subject: [PATCH v2 2/5] mmzone: Introduce folio_migratetype()

Introduce folio_migratetype() as a folio equivalent for
get_pageblock_migratetype(). This function intends to return the
migratetype the folio is located in, hence the name choice.

Signed-off-by: Vishal Moola (Oracle) <vishal.moola@...il.com>
Reviewed-by: Matthew Wilcox (Oracle) <willy@...radead.org>
---
 include/linux/mmzone.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 744bf32e48a8..b58c76e68ac7 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -105,6 +105,9 @@ extern int page_group_by_mobility_disabled;
 #define get_pageblock_migratetype(page)					\
 	get_pfnblock_flags_mask(page, page_to_pfn(page), MIGRATETYPE_MASK)
 
+#define folio_migratetype(folio)				\
+	get_pfnblock_flags_mask(&folio->page, folio_pfn(folio),		\
+			MIGRATETYPE_MASK)
 struct free_area {
 	struct list_head	free_list[MIGRATE_TYPES];
 	unsigned long		nr_free;
-- 
2.40.1