fuse: drop redundant arguments to fuse_perform_write

pos is always equal to iocb->ki_pos, and mapping is always equal to
iocb->ki_filp->f_mapping.

Link: https://lkml.kernel.org/r/20230601145904.1385409-12-hch@lst.deSigned-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Acked-by: Miklos Szeredi <mszeredi@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andreas Gruenbacher <agruenba@redhat.com>
Cc: Anna Schumaker <anna@kernel.org>
Cc: Chao Yu <chao@kernel.org>
Cc: Christian Brauner <brauner@kernel.org>
Cc: "Darrick J. Wong" <djwong@kernel.org>
Cc: Ilya Dryomov <idryomov@gmail.com>
Cc: Jaegeuk Kim <jaegeuk@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Miklos Szeredi <miklos@szeredi.hu>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: Trond Myklebust <trond.myklebust@hammerspace.com>
Cc: Xiubo Li <xiubli@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

fs/fuse/file.c

@@ -1280,13 +1280,13 @@ static inline unsigned int fuse_wr_pages(loff_t pos, size_t len,
 		     max_pages);
 }
 
-static ssize_t fuse_perform_write(struct kiocb *iocb,
-				  struct address_space *mapping,
-				  struct iov_iter *ii, loff_t pos)
+static ssize_t fuse_perform_write(struct kiocb *iocb, struct iov_iter *ii)
 {
+	struct address_space *mapping = iocb->ki_filp->f_mapping;
 	struct inode *inode = mapping->host;
 	struct fuse_conn *fc = get_fuse_conn(inode);
 	struct fuse_inode *fi = get_fuse_inode(inode);
+	loff_t pos = iocb->ki_pos;
 	int err = 0;
 	ssize_t res = 0;
 
@@ -1383,8 +1383,7 @@ static ssize_t fuse_cache_write_iter(struct kiocb *iocb, struct iov_iter *from)
 		if (written < 0 || !iov_iter_count(from))
 			goto out;
 
-		written_buffered = fuse_perform_write(iocb, mapping, from,
-						      iocb->ki_pos);
+		written_buffered = fuse_perform_write(iocb, from);
 		if (written_buffered < 0) {
 			err = written_buffered;
 			goto out;
@@ -1403,7 +1402,7 @@ static ssize_t fuse_cache_write_iter(struct kiocb *iocb, struct iov_iter *from)
 
 		written += written_buffered;
 	} else {
-		written = fuse_perform_write(iocb, mapping, from, iocb->ki_pos);
+		written = fuse_perform_write(iocb, from);
 	}
 out:
 	inode_unlock(inode);