diff mbox series

[38/40] codetag: debug: mark codetags for reserved pages as empty

Message ID 20230501165450.15352-39-surenb@google.com
State New
Headers
Series Memory allocation profiling |

Commit Message

Suren Baghdasaryan May 1, 2023, 4:54 p.m. UTC 
  To avoid debug warnings while freeing reserved pages which were not
allocated with usual allocators, mark their codetags as empty before
freeing.
Maybe we can annotate reserved pages correctly and avoid this?

Signed-off-by: Suren Baghdasaryan <surenb@google.com>
---
 include/linux/mm.h | 8 ++++++++
 1 file changed, 8 insertions(+)
diff mbox series

Patch

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 27ce77080c79..f5969cb85879 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -5,6 +5,7 @@ 
 #include <linux/errno.h>
 #include <linux/mmdebug.h>
 #include <linux/gfp.h>
+#include <linux/pgalloc_tag.h>
 #include <linux/bug.h>
 #include <linux/list.h>
 #include <linux/mmzone.h>
@@ -2920,6 +2921,13 @@  extern void reserve_bootmem_region(phys_addr_t start, phys_addr_t end);
 /* Free the reserved page into the buddy system, so it gets managed. */
 static inline void free_reserved_page(struct page *page)
 {
+	union codetag_ref *ref;
+
+	ref = get_page_tag_ref(page);
+	if (ref) {
+		set_codetag_empty(ref);
+		put_page_tag_ref(ref);
+	}
 	ClearPageReserved(page);
 	init_page_count(page);
 	__free_page(page);