linux-kernel - [PATCH 2/3] mm/page_reporting: Allow architecture to select reporting order

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Date:   Mon, 21 Jun 2021 13:11:51 +0800
From:   Gavin Shan <gshan@...hat.com>
To:     linux-mm@...ck.org
Cc:     linux-kernel@...r.kernel.org, alexander.duyck@...il.com,
        akpm@...ux-foundation.org, david@...hat.com,
        anshuman.khandual@....com, catalin.marinas@....com,
        will@...nel.org, shan.gavin@...il.com
Subject: [PATCH 2/3] mm/page_reporting: Allow architecture to select reporting order

This renames PAGE_REPORTING_MIN_ORDER to PAGE_REPORTING_ORDER, to
match with the variable name (@page_reporting_order). Its value is
stick to @pageblock_order if architecture doesn't specify it. This
is going to be used by arm64 when 64KB base page size is selected.

Signed-off-by: Gavin Shan <gshan@...hat.com>
---
 mm/page_reporting.c | 2 +-
 mm/page_reporting.h | 7 +++++--
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/mm/page_reporting.c b/mm/page_reporting.c
index 759b29f6e845..d4d9f5265d6b 100644
--- a/mm/page_reporting.c
+++ b/mm/page_reporting.c
@@ -10,7 +10,7 @@
 #include "page_reporting.h"
 #include "internal.h"
 
-unsigned int page_reporting_order = PAGE_REPORTING_MIN_ORDER;
+unsigned int page_reporting_order = PAGE_REPORTING_ORDER;
 module_param(page_reporting_order, uint, 0644);
 MODULE_PARM_DESC(page_reporting_order, "Set page reporting order");
 
diff --git a/mm/page_reporting.h b/mm/page_reporting.h
index 19d58a590cc2..91688dd30abe 100644
--- a/mm/page_reporting.h
+++ b/mm/page_reporting.h
@@ -10,9 +10,12 @@
 #include <linux/pgtable.h>
 #include <linux/scatterlist.h>
 
-#define PAGE_REPORTING_MIN_ORDER	pageblock_order
-
 #ifdef CONFIG_PAGE_REPORTING
+
+#ifndef PAGE_REPORTING_ORDER
+#define PAGE_REPORTING_ORDER pageblock_order
+#endif
+
 DECLARE_STATIC_KEY_FALSE(page_reporting_enabled);
 extern unsigned int page_reporting_order;
 void __page_reporting_notify(void);
-- 
2.23.0