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From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
To: linux-mm@kvack.org, linux-fsdevel@vger.kernel.org,
	akpm@linux-foundation.org
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>,
	William Kucharski <william.kucharski@oracle.com>,
	Vlastimil Babka <vbabka@suse.cz>,
	Anshuman Khandual <anshuman.khandual@arm.com>
Subject: [PATCH 4/8] mm/page_owner: Constify dump_page_owner
Date: Fri, 30 Apr 2021 15:55:45 +0100
Message-ID: <20210430145549.2662354-5-willy@infradead.org> (raw)
In-Reply-To: <20210430145549.2662354-1-willy@infradead.org>

dump_page_owner() only uses struct page to find the page_ext, and
lookup_page_ext() already takes a const argument.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: William Kucharski <william.kucharski@oracle.com>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
 include/linux/page_owner.h | 6 +++---
 mm/page_owner.c            | 2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/include/linux/page_owner.h b/include/linux/page_owner.h
index 3468794f83d2..719bfe5108c5 100644
--- a/include/linux/page_owner.h
+++ b/include/linux/page_owner.h
@@ -14,7 +14,7 @@ extern void __set_page_owner(struct page *page,
 extern void __split_page_owner(struct page *page, unsigned int nr);
 extern void __copy_page_owner(struct page *oldpage, struct page *newpage);
 extern void __set_page_owner_migrate_reason(struct page *page, int reason);
-extern void __dump_page_owner(struct page *page);
+extern void __dump_page_owner(const struct page *page);
 extern void pagetypeinfo_showmixedcount_print(struct seq_file *m,
 					pg_data_t *pgdat, struct zone *zone);
 
@@ -46,7 +46,7 @@ static inline void set_page_owner_migrate_reason(struct page *page, int reason)
 	if (static_branch_unlikely(&page_owner_inited))
 		__set_page_owner_migrate_reason(page, reason);
 }
-static inline void dump_page_owner(struct page *page)
+static inline void dump_page_owner(const struct page *page)
 {
 	if (static_branch_unlikely(&page_owner_inited))
 		__dump_page_owner(page);
@@ -69,7 +69,7 @@ static inline void copy_page_owner(struct page *oldpage, struct page *newpage)
 static inline void set_page_owner_migrate_reason(struct page *page, int reason)
 {
 }
-static inline void dump_page_owner(struct page *page)
+static inline void dump_page_owner(const struct page *page)
 {
 }
 #endif /* CONFIG_PAGE_OWNER */
diff --git a/mm/page_owner.c b/mm/page_owner.c
index adfabb560eb9..f51a57e92aa3 100644
--- a/mm/page_owner.c
+++ b/mm/page_owner.c
@@ -392,7 +392,7 @@ print_page_owner(char __user *buf, size_t count, unsigned long pfn,
 	return -ENOMEM;
 }
 
-void __dump_page_owner(struct page *page)
+void __dump_page_owner(const struct page *page)
 {
 	struct page_ext *page_ext = lookup_page_ext(page);
 	struct page_owner *page_owner;
-- 
2.30.2


  parent reply index

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-30 14:55 [PATCH 0/8] Folio Prequel patches Matthew Wilcox (Oracle)
2021-04-30 14:55 ` [PATCH 1/8] mm: Optimise nth_page for contiguous memmap Matthew Wilcox (Oracle)
2021-04-30 14:55 ` [PATCH 2/8] mm: Make __dump_page static Matthew Wilcox (Oracle)
2021-04-30 14:55 ` [PATCH 3/8] mm/debug: Factor PagePoisoned out of __dump_page Matthew Wilcox (Oracle)
2021-05-12  3:29   ` Kefeng Wang
2021-05-12  3:38     ` Matthew Wilcox
2021-05-12  3:53       ` Kefeng Wang
2021-04-30 14:55 ` Matthew Wilcox (Oracle) [this message]
2021-04-30 14:55 ` [PATCH 5/8] mm: Make compound_head const-preserving Matthew Wilcox (Oracle)
2021-04-30 14:55 ` [PATCH 6/8] mm: Constify get_pfnblock_flags_mask and get_pfnblock_migratetype Matthew Wilcox (Oracle)
2021-04-30 14:55 ` [PATCH 7/8] mm: Constify page_count and page_ref_count Matthew Wilcox (Oracle)
2021-04-30 14:55 ` [PATCH 8/8] mm: Fix struct page layout on 32-bit systems Matthew Wilcox (Oracle)
2021-05-10 16:12 ` [PATCH 0/8] Folio Prequel patches Matteo Croce
2021-05-10 16:29   ` Matthew Wilcox

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