Merge tag 'mm-stable-2023-06-24-19-15' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull mm updates from Andrew Morton:

 - Yosry Ahmed brought back some cgroup v1 stats in OOM logs

 - Yosry has also eliminated cgroup's atomic rstat flushing

 - Nhat Pham adds the new cachestat() syscall. It provides userspace
   with the ability to query pagecache status - a similar concept to
   mincore() but more powerful and with improved usability

 - Mel Gorman provides more optimizations for compaction, reducing the
   prevalence of page rescanning

 - Lorenzo Stoakes has done some maintanance work on the
   get_user_pages() interface

 - Liam Howlett continues with cleanups and maintenance work to the
   maple tree code. Peng Zhang also does some work on maple tree

 - Johannes Weiner has done some cleanup work on the compaction code

 - David Hildenbrand has contributed additional selftests for
   get_user_pages()

 - Thomas Gleixner has contributed some maintenance and optimization
   work for the vmalloc code

 - Baolin Wang has provided some compaction cleanups,

 - SeongJae Park continues maintenance work on the DAMON code

 - Huang Ying has done some maintenance on the swap code's usage of
   device refcounting

 - Christoph Hellwig has some cleanups for the filemap/directio code

 - Ryan Roberts provides two patch series which yield some
   rationalization of the kernel's access to pte entries - use the
   provided APIs rather than open-coding accesses

 - Lorenzo Stoakes has some fixes to the interaction between pagecache
   and directio access to file mappings

 - John Hubbard has a series of fixes to the MM selftesting code

 - ZhangPeng continues the folio conversion campaign

 - Hugh Dickins has been working on the pagetable handling code, mainly
   with a view to reducing the load on the mmap_lock

 - Catalin Marinas has reduced the arm64 kmalloc() minimum alignment
   from 128 to 8

 - Domenico Cerasuolo has improved the zswap reclaim mechanism by
   reorganizing the LRU management

 - Matthew Wilcox provides some fixups to make gfs2 work better with the
   buffer_head code

 - Vishal Moola also has done some folio conversion work

 - Matthew Wilcox has removed the remnants of the pagevec code - their
   functionality is migrated over to struct folio_batch

* tag 'mm-stable-2023-06-24-19-15' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (380 commits)
  mm/hugetlb: remove hugetlb_set_page_subpool()
  mm: nommu: correct the range of mmap_sem_read_lock in task_mem()
  hugetlb: revert use of page_cache_next_miss()
  Revert "page cache: fix page_cache_next/prev_miss off by one"
  mm/vmscan: fix root proactive reclaim unthrottling unbalanced node
  mm: memcg: rename and document global_reclaim()
  mm: kill [add|del]_page_to_lru_list()
  mm: compaction: convert to use a folio in isolate_migratepages_block()
  mm: zswap: fix double invalidate with exclusive loads
  mm: remove unnecessary pagevec includes
  mm: remove references to pagevec
  mm: rename invalidate_mapping_pagevec to mapping_try_invalidate
  mm: remove struct pagevec
  net: convert sunrpc from pagevec to folio_batch
  i915: convert i915_gpu_error to use a folio_batch
  pagevec: rename fbatch_count()
  mm: remove check_move_unevictable_pages()
  drm: convert drm_gem_put_pages() to use a folio_batch
  i915: convert shmem_sg_free_table() to use a folio_batch
  scatterlist: add sg_set_folio()
  ...

1 files changed, 9 insertions, 58 deletions

diff --git a/include/linux/pagevec.h b/include/linux/pagevec.h
index f582f7213ea5..87cc678adc85 100644
--- a/include/linux/pagevec.h
+++ b/include/linux/pagevec.h
@@ -3,65 +3,18 @@
  * include/linux/pagevec.h
  *
  * In many places it is efficient to batch an operation up against multiple
- * pages.  A pagevec is a multipage container which is used for that.
+ * folios.  A folio_batch is a container which is used for that.
  */
 
 #ifndef _LINUX_PAGEVEC_H
 #define _LINUX_PAGEVEC_H
 
-#include <linux/xarray.h>
+#include <linux/types.h>
 
-/* 15 pointers + header align the pagevec structure to a power of two */
+/* 15 pointers + header align the folio_batch structure to a power of two */
 #define PAGEVEC_SIZE	15
 
-struct page;
 struct folio;
-struct address_space;
-
-/* Layout must match folio_batch */
-struct pagevec {
-	unsigned char nr;
-	bool percpu_pvec_drained;
-	struct page *pages[PAGEVEC_SIZE];
-};
-
-void __pagevec_release(struct pagevec *pvec);
-
-static inline void pagevec_init(struct pagevec *pvec)
-{
-	pvec->nr = 0;
-	pvec->percpu_pvec_drained = false;
-}
-
-static inline void pagevec_reinit(struct pagevec *pvec)
-{
-	pvec->nr = 0;
-}
-
-static inline unsigned pagevec_count(struct pagevec *pvec)
-{
-	return pvec->nr;
-}
-
-static inline unsigned pagevec_space(struct pagevec *pvec)
-{
-	return PAGEVEC_SIZE - pvec->nr;
-}
-
-/*
- * Add a page to a pagevec.  Returns the number of slots still available.
- */
-static inline unsigned pagevec_add(struct pagevec *pvec, struct page *page)
-{
-	pvec->pages[pvec->nr++] = page;
-	return pagevec_space(pvec);
-}
-
-static inline void pagevec_release(struct pagevec *pvec)
-{
-	if (pagevec_count(pvec))
-		__pagevec_release(pvec);
-}
 
 /**
  * struct folio_batch - A collection of folios.
@@ -78,11 +31,6 @@ struct folio_batch {
 	struct folio *folios[PAGEVEC_SIZE];
 };
 
-/* Layout must match pagevec */
-static_assert(sizeof(struct pagevec) == sizeof(struct folio_batch));
-static_assert(offsetof(struct pagevec, pages) ==
-		offsetof(struct folio_batch, folios));
-
 /**
  * folio_batch_init() - Initialise a batch of folios
  * @fbatch: The folio batch.
@@ -105,7 +53,7 @@ static inline unsigned int folio_batch_count(struct folio_batch *fbatch)
 	return fbatch->nr;
 }
 
-static inline unsigned int fbatch_space(struct folio_batch *fbatch)
+static inline unsigned int folio_batch_space(struct folio_batch *fbatch)
 {
 	return PAGEVEC_SIZE - fbatch->nr;
 }
@@ -124,12 +72,15 @@ static inline unsigned folio_batch_add(struct folio_batch *fbatch,
 		struct folio *folio)
 {
 	fbatch->folios[fbatch->nr++] = folio;
-	return fbatch_space(fbatch);
+	return folio_batch_space(fbatch);
 }
 
+void __folio_batch_release(struct folio_batch *pvec);
+
 static inline void folio_batch_release(struct folio_batch *fbatch)
 {
-	pagevec_release((struct pagevec *)fbatch);
+	if (folio_batch_count(fbatch))
+		__folio_batch_release(fbatch);
 }
 
 void folio_batch_remove_exceptionals(struct folio_batch *fbatch);