>>+       if (mtod(m, intptr_t) & 0x3) {
>>+               intptr_t i = mtod(m, intptr_t) & 0x3;
>>+               bcopy(m->m_data, m->m_data - i, m->m_len);
>Since the arguments overlap, that should be ovbcopy.

	just to be sure: there's no ovbcopy in the kernel any more.
	bcopy in the kernel is safe against overlap. (sys/lib/libkern/bcopy.c)

itojun