ocfs2_write_begin_nolock
ret = ocfs2_write_begin_nolock(mapping, pos, len, OCFS2_WRITE_BUFFER,
ret = ocfs2_write_begin_nolock(inode->i_mapping, pos, len,
int ocfs2_write_begin_nolock(struct address_space *mapping,
err = ocfs2_write_begin_nolock(mapping, pos, len, OCFS2_WRITE_MMAP,
TRACE_EVENT(ocfs2_write_begin_nolock,