block_write_begin() no longer is being passed aop_flags.

The flag is now obsolete, we don't need to set flags here or
pass them.

Signed-off-by: Auke Kok <auke.kok@versity.com>

kmod/src/Makefile.kernelcompat

@@ -378,3 +378,11 @@ endif
 ifneq (,$(shell grep 'int mpage_read_folio.struct folio .folio' include/linux/mpage.h))
 ccflags-y += -DKC_MPAGE_READ_FOLIO
 endif
+
+#
+# v5.18-rc5-219-gb3992d1e2ebc
+#
+# block_write_begin() no longer is being passed aop_flags
+ifneq (,$(shell grep -C1 'int block_write_begin' include/linux/buffer_head.h | tail -n 2 | grep 'unsigned flags'))
+ccflags-y += -DKC_BLOCK_WRITE_BEGIN_AOP_FLAGS
+endif

kmod/src/data.c

@@ -836,7 +836,10 @@ struct write_begin_data {
 
 static int scoutfs_write_begin(struct file *file,
 			       struct address_space *mapping, loff_t pos,
-			       unsigned len, unsigned flags,
+			       unsigned len,
+#ifdef KC_BLOCK_WRITE_BEGIN_AOP_FLAGS
+			       unsigned flags,
+#endif
 			       struct page **pagep, void **fsdata)
 {
 	struct inode *inode = mapping->host;
@@ -871,13 +874,18 @@ retry:
 	if (ret < 0)
 		goto out;
 
+#ifdef KC_BLOCK_WRITE_BEGIN_AOP_FLAGS
 	/* can't re-enter fs, have trans */
 	flags |= AOP_FLAG_NOFS;
+#endif
 
 	/* generic write_end updates i_size and calls dirty_inode */
 	ret = scoutfs_dirty_inode_item(inode, wbd->lock) ?:
-	      block_write_begin(mapping, pos, len, flags, pagep,
-				scoutfs_get_block_write);
+	      block_write_begin(mapping, pos, len,
+#ifdef KC_BLOCK_WRITE_BEGIN_AOP_FLAGS
+				flags,
+#endif
+				pagep, scoutfs_get_block_write);
 	if (ret < 0) {
 		scoutfs_release_trans(sb);
 		scoutfs_inode_index_unlock(sb, &wbd->ind_locks);