mm/balloon_compaction: remove balloon_page_push/pop()

Let's remove these helpers as they are unused now.

Link: https://lkml.kernel.org/r/20260119230133.3551867-14-david@kernel.org
Signed-off-by: David Hildenbrand (Red Hat) <david@kernel.org>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Eugenio Pérez <eperezma@redhat.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Jerrin Shaji George <jerrin.shaji-george@broadcom.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: SeongJae Park <sj@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/include/linux/balloon_compaction.h b/include/linux/balloon_compaction.h
index 1452ea0635245c359465b4bcf6d3245c0f9876ac..e5451cf1f658941f8d2192060cb80e32077b760c 100644 (file)
--- a/include/linux/balloon_compaction.h
+++ b/include/linux/balloon_compaction.h
@@ -126,34 +126,4 @@ static inline void balloon_page_finalize(struct page *page)
                set_page_private(page, 0);
        /* PageOffline is sticky until the page is freed to the buddy. */
 }
-
-/*
- * balloon_page_push - insert a page into a page list.
- * @head : pointer to list
- * @page : page to be added
- *
- * Caller must ensure the page is private and protect the list.
- */
-static inline void balloon_page_push(struct list_head *pages, struct page *page)
-{
-       list_add(&page->lru, pages);
-}
-
-/*
- * balloon_page_pop - remove a page from a page list.
- * @head : pointer to list
- * @page : page to be added
- *
- * Caller must ensure the page is private and protect the list.
- */
-static inline struct page *balloon_page_pop(struct list_head *pages)
-{
-       struct page *page = list_first_entry_or_null(pages, struct page, lru);
-
-       if (!page)
-               return NULL;
-
-       list_del(&page->lru);
-       return page;
-}
 #endif /* _LINUX_BALLOON_COMPACTION_H */

diff --git a/mm/balloon_compaction.c b/mm/balloon_compaction.c
index cf4d931763920ee3495e3a9dab086db894ef522b..5e1507a13a52f314a5f2dd7400e6753564d0a3e2 100644 (file)
--- a/mm/balloon_compaction.c
+++ b/mm/balloon_compaction.c
@@ -128,9 +128,8 @@ EXPORT_SYMBOL_GPL(balloon_page_alloc);
  * Drivers must call this function to properly enqueue a new allocated balloon
  * page before definitively removing the page from the guest system.
  *
- * Drivers must not call balloon_page_enqueue on pages that have been pushed to
- * a list with balloon_page_push before removing them with balloon_page_pop. To
- * enqueue a list of pages, use balloon_page_list_enqueue instead.
+ * Drivers must not enqueue pages while page->lru is still in
+ * use, and must not use page->lru until a page was unqueued again.
  */
 void balloon_page_enqueue(struct balloon_dev_info *b_dev_info,
                          struct page *page)