bmilekic 70d52016a3 Change m_devget()'s outdated and unused `offset' argument to actually mean ... something: offset into the first mbuf of the target chain before copying the source data over. Make drivers using m_devget() with a first argument "data - ETHER_ALIGN" to use the offset argument to pass ETHER_ALIGN in. The way it was previously done is potentially dangerous if the source data was at the top of a page and the offset caused the previous page to be copied (if the previous page has not yet been appropriately mapped). The old `offset' argument in m_devget() is not used anywhere (it's always 0) and dates back to ~1995 (and earlier?) when support for ethernet trailers existed. With that support gone, it was merely collecting dust. Tested on alpha by: jlemon Partially submitted by: jlemon Reviewed by: jlemon MFC after: 3 weeks		2001-06-20 19:48:35 +00:00
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if_sf.c	Change m_devget()'s outdated and unused `offset' argument to actually mean	2001-06-20 19:48:35 +00:00
if_sfreg.h	Change and clean the mutex lock interface.	2001-02-09 06:11:45 +00:00