f2fs: fix to use f2fs_readpage_limit() in f2fs_read_multi_pages()

Multipage read flow should consider fsverity, so it needs to use
f2fs_readpage_limit() instead of i_size_read() to check EOF condition.
Signed-off-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/data.c

@@ -2048,7 +2048,8 @@ int f2fs_read_multi_pages(struct compress_ctx *cc, struct bio **bio_ret,
 
 	f2fs_bug_on(sbi, f2fs_cluster_is_empty(cc));
 
-	last_block_in_file = (i_size_read(inode) + blocksize - 1) >> blkbits;
+	last_block_in_file = (f2fs_readpage_limit(inode) +
+					blocksize - 1) >> blkbits;
 
 	/* get rid of pages beyond EOF */
 	for (i = 0; i < cc->cluster_size; i++) {