diff mbox series

[153/192] mm/page_owner: constify dump_page_owner

Message ID 20210629024116.fCp0fe46Q%akpm@linux-foundation.org (mailing list archive)
State New
Headers show
Series [001/192] mm/gup: fix try_grab_compound_head() race with split_huge_page() | expand

Commit Message

Andrew Morton June 29, 2021, 2:41 a.m. UTC 
From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Subject: mm/page_owner: constify dump_page_owner

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

Link: https://lkml.kernel.org/r/20210416231531.2521383-4-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Reviewed-by: William Kucharski <william.kucharski@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/page_owner.h |    6 +++---
 mm/page_owner.c            |    2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)
diff mbox series

Patch

--- a/include/linux/page_owner.h~mm-page_owner-constify-dump_page_owner
+++ a/include/linux/page_owner.h
@@ -14,7 +14,7 @@  extern void __set_page_owner(struct 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_migrat
 	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(struc
 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 */
--- a/mm/page_owner.c~mm-page_owner-constify-dump_page_owner
+++ a/mm/page_owner.c
@@ -392,7 +392,7 @@  err:
 	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;