splice: remove generic_file_splice_write_nolock()

Remove the now unused generic_file_splice_write_nolock() function.
It's conceptually broken anyway, because splice may need to wait for
pipe events so holding locks across the whole operation is wrong.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

1 files changed, 0 insertions, 59 deletions

diff --git a/fs/splice.c b/fs/splice.c
index 584b2b7a1dbe..128ee36a719b 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -811,65 +811,6 @@ ssize_t splice_from_pipe(struct pipe_inode_info *pipe, struct file *out,
 }
 
 /**
- * generic_file_splice_write_nolock - generic_file_splice_write without mutexes
- * @pipe:       pipe info
- * @out:        file to write to
- * @ppos:       position in @out
- * @len:        number of bytes to splice
- * @flags:      splice modifier flags
- *
- * Description:
- *    Will either move or copy pages (determined by @flags options) from
- *    the given pipe inode to the given file. The caller is responsible
- *    for acquiring i_mutex on both inodes.
- *
- */
-ssize_t
-generic_file_splice_write_nolock(struct pipe_inode_info *pipe, struct file *out,
-                                 loff_t *ppos, size_t len, unsigned int flags)
-{
-        struct address_space *mapping = out->f_mapping;
-        struct inode *inode = mapping->host;
-        struct splice_desc sd = {
-                .total_len = len,
-                .flags = flags,
-                .pos = *ppos,
-                .u.file = out,
-        };
-        ssize_t ret;
-        int err;
-
-        err = file_remove_suid(out);
-        if (unlikely(err))
-                return err;
-
-        ret = __splice_from_pipe(pipe, &sd, pipe_to_file);
-        if (ret > 0) {
-                unsigned long nr_pages;
-
-                *ppos += ret;
-                nr_pages = (ret + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
-
-                /*
-                 * If file or inode is SYNC and we actually wrote some data,
-                 * sync it.
-                 */
-                if (unlikely((out->f_flags & O_SYNC) || IS_SYNC(inode))) {
-                        err = generic_osync_inode(inode, mapping,
-                                                  OSYNC_METADATA|OSYNC_DATA);
-
-                        if (err)
-                                ret = err;
-                }
-                balance_dirty_pages_ratelimited_nr(mapping, nr_pages);
-        }
-
-        return ret;
-}
-
-EXPORT_SYMBOL(generic_file_splice_write_nolock);
-
-/**
  * generic_file_splice_write - splice data from a pipe to a file
  * @pipe:       pipe info
  * @out:        file to write to