[PATCH v8 18/25] netfs: Remove netfs_alloc/free_folioq_buffer()

[David Howells <dhowells@redhat.com>]

Remove netfs_alloc/free_folioq_buffer() as bvecq_alloc_*() and bvecq_put()
should now be used instead.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Paulo Alcantara <pc@manguebit.org>
cc: Matthew Wilcox <willy@infradead.org>
cc: Christoph Hellwig <hch@infradead.org>
cc: Steve French <sfrench@samba.org>
cc: linux-cifs@vger.kernel.org
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
---
 fs/afs/dir_edit.c       |  1 -
 fs/netfs/misc.c         | 98 -----------------------------------------
 fs/smb/client/smb2ops.c |  1 -
 include/linux/netfs.h   |  6 ---
 4 files changed, 106 deletions(-)

diff --git a/fs/afs/dir_edit.c b/fs/afs/dir_edit.c
index 01c6265e8865..31fdef23c6b6 100644
--- a/fs/afs/dir_edit.c
+++ b/fs/afs/dir_edit.c
@@ -10,7 +10,6 @@
 #include <linux/namei.h>
 #include <linux/pagemap.h>
 #include <linux/iversion.h>
-#include <linux/folio_queue.h>
 #include "internal.h"
 #include "xdr_fs.h"
 
diff --git a/fs/netfs/misc.c b/fs/netfs/misc.c
index ee67a0681784..8fc4e5ef2152 100644
--- a/fs/netfs/misc.c
+++ b/fs/netfs/misc.c
@@ -8,104 +8,6 @@
 #include <linux/swap.h>
 #include "internal.h"
 
-#if 0
-/**
- * netfs_alloc_folioq_buffer - Allocate buffer space into a folio queue
- * @mapping: Address space to set on the folio (or NULL).
- * @_buffer: Pointer to the folio queue to add to (may point to a NULL; updated).
- * @_cur_size: Current size of the buffer (updated).
- * @size: Target size of the buffer.
- * @gfp: The allocation constraints.
- */
-int netfs_alloc_folioq_buffer(struct address_space *mapping,
-			      struct folio_queue **_buffer,
-			      size_t *_cur_size, ssize_t size, gfp_t gfp)
-{
-	struct folio_queue *tail = *_buffer, *p;
-
-	size = round_up(size, PAGE_SIZE);
-	if (*_cur_size >= size)
-		return 0;
-
-	if (tail)
-		while (tail->next)
-			tail = tail->next;
-
-	do {
-		struct folio *folio;
-		int order = 0, slot;
-
-		if (!tail || folioq_full(tail)) {
-			p = netfs_folioq_alloc(0, GFP_NOFS, netfs_trace_folioq_alloc_buffer);
-			if (!p)
-				return -ENOMEM;
-			if (tail) {
-				tail->next = p;
-				p->prev = tail;
-			} else {
-				*_buffer = p;
-			}
-			tail = p;
-		}
-
-		if (size - *_cur_size > PAGE_SIZE)
-			order = umin(ilog2(size - *_cur_size) - PAGE_SHIFT,
-				     MAX_PAGECACHE_ORDER);
-
-		folio = folio_alloc(gfp, order);
-		if (!folio && order > 0)
-			folio = folio_alloc(gfp, 0);
-		if (!folio)
-			return -ENOMEM;
-
-		folio->mapping = mapping;
-		folio->index = *_cur_size / PAGE_SIZE;
-		trace_netfs_folio(folio, netfs_folio_trace_alloc_buffer);
-		slot = folioq_append_mark(tail, folio);
-		*_cur_size += folioq_folio_size(tail, slot);
-	} while (*_cur_size < size);
-
-	return 0;
-}
-EXPORT_SYMBOL(netfs_alloc_folioq_buffer);
-
-/**
- * netfs_free_folioq_buffer - Free a folio queue.
- * @fq: The start of the folio queue to free
- *
- * Free up a chain of folio_queues and, if marked, the marked folios they point
- * to.
- */
-void netfs_free_folioq_buffer(struct folio_queue *fq)
-{
-	struct folio_queue *next;
-	struct folio_batch fbatch;
-
-	folio_batch_init(&fbatch);
-
-	for (; fq; fq = next) {
-		for (int slot = 0; slot < folioq_count(fq); slot++) {
-			struct folio *folio = folioq_folio(fq, slot);
-
-			if (!folio ||
-			    !folioq_is_marked(fq, slot))
-				continue;
-
-			trace_netfs_folio(folio, netfs_folio_trace_put);
-			if (folio_batch_add(&fbatch, folio))
-				folio_batch_release(&fbatch);
-		}
-
-		netfs_stat_d(&netfs_n_folioq);
-		next = fq->next;
-		kfree(fq);
-	}
-
-	folio_batch_release(&fbatch);
-}
-EXPORT_SYMBOL(netfs_free_folioq_buffer);
-#endif
-
 /**
  * netfs_dirty_folio - Mark folio dirty and pin a cache object for writeback
  * @mapping: The mapping the folio belongs to.
diff --git a/fs/smb/client/smb2ops.c b/fs/smb/client/smb2ops.c
index 2b5d745ba16e..28902d3c5ef4 100644
--- a/fs/smb/client/smb2ops.c
+++ b/fs/smb/client/smb2ops.c
@@ -13,7 +13,6 @@
 #include <linux/sort.h>
 #include <crypto/aead.h>
 #include <linux/fiemap.h>
-#include <linux/folio_queue.h>
 #include <uapi/linux/magic.h>
 #include "cifsfs.h"
 #include "cifsglob.h"
diff --git a/include/linux/netfs.h b/include/linux/netfs.h
index 6b43978bfcda..621f1d41e9f5 100644
--- a/include/linux/netfs.h
+++ b/include/linux/netfs.h
@@ -472,12 +472,6 @@ void netfs_end_io_write(struct inode *inode);
 int netfs_start_io_direct(struct inode *inode);
 void netfs_end_io_direct(struct inode *inode);
 
-/* Buffer wrangling helpers API. */
-int netfs_alloc_folioq_buffer(struct address_space *mapping,
-			      struct folio_queue **_buffer,
-			      size_t *_cur_size, ssize_t size, gfp_t gfp);
-void netfs_free_folioq_buffer(struct folio_queue *fq);
-
 /* Writeback exclusion API. */
 bool netfs_wb_begin(struct netfs_inode *ictx, bool nowait);
 void netfs_wb_end(struct netfs_inode *ictx);