ext4: export iov_shorten from kernel for ext4's use

Export iov_shorten() from kernel so that ext4 can
truncate too-large writes to bitmapped files.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>

diff --git a/fs/read_write.c b/fs/read_write.c
index c4d3d17923f155004fec85fd04f836a06aa585f3..1c177f29e1b72be0aa63f38496ed81727d01f653 100644 (file)
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -446,6 +446,7 @@ unsigned long iov_shorten(struct iovec *iov, unsigned long nr_segs, size_t to)
        }
        return seg;
 }
+EXPORT_SYMBOL(iov_shorten);
 
 ssize_t do_sync_readv_writev(struct file *filp, const struct iovec *iov,
                unsigned long nr_segs, size_t len, loff_t *ppos, iov_fn_t fn)