[PATCH] md: convert recently exported symbol to GPL

...because that seems to be the preferred practice these days.
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/md/md.c

@@ -478,7 +478,7 @@ int sync_page_io(struct block_device *bdev, sector_t sector, int size,
 	bio_put(bio);
 	return ret;
 }
-EXPORT_SYMBOL(sync_page_io);
+EXPORT_SYMBOL_GPL(sync_page_io);
 
 static int read_disk_sb(mdk_rdev_t * rdev, int size)
 {