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-rw-r--r--mm/filemap.c39
1 files changed, 0 insertions, 39 deletions
diff --git a/mm/filemap.c b/mm/filemap.c
index f863e1d7e227..3587554f45ef 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2462,45 +2462,6 @@ out:
2462} 2462}
2463EXPORT_SYMBOL(__generic_file_aio_write); 2463EXPORT_SYMBOL(__generic_file_aio_write);
2464 2464
2465
2466/**
2467 * generic_file_aio_write_nolock - write data, usually to a device
2468 * @iocb: IO state structure
2469 * @iov: vector with data to write
2470 * @nr_segs: number of segments in the vector
2471 * @pos: position in file where to write
2472 *
2473 * This is a wrapper around __generic_file_aio_write() which takes care of
2474 * syncing the file in case of O_SYNC file. It does not take i_mutex for the
2475 * write itself but may do so during syncing. It is meant for users like block
2476 * devices which do not need i_mutex during write. If your filesystem needs to
2477 * do a write but already holds i_mutex, use __generic_file_aio_write()
2478 * directly and then sync the file like generic_file_aio_write().
2479 */
2480ssize_t generic_file_aio_write_nolock(struct kiocb *iocb,
2481 const struct iovec *iov, unsigned long nr_segs, loff_t pos)
2482{
2483 struct file *file = iocb->ki_filp;
2484 struct address_space *mapping = file->f_mapping;
2485 struct inode *inode = mapping->host;
2486 ssize_t ret;
2487
2488 BUG_ON(iocb->ki_pos != pos);
2489
2490 ret = __generic_file_aio_write(iocb, iov, nr_segs, &iocb->ki_pos);
2491
2492 if ((ret > 0 || ret == -EIOCBQUEUED) &&
2493 ((file->f_flags & O_SYNC) || IS_SYNC(inode))) {
2494 ssize_t err;
2495
2496 err = sync_page_range_nolock(inode, mapping, pos, ret);
2497 if (err < 0 && ret > 0)
2498 ret = err;
2499 }
2500 return ret;
2501}
2502EXPORT_SYMBOL(generic_file_aio_write_nolock);
2503
2504/** 2465/**
2505 * generic_file_aio_write - write data to a file 2466 * generic_file_aio_write - write data to a file
2506 * @iocb: IO state structure 2467 * @iocb: IO state structure