asami b50b9c7209 Change how mirror writes are handled, according to the discussion on the ... mailing list. When initiating a write, ccdbuffer() returns two "struct ccdbuf *"s linked together by the cb_mirror field. "cb_pflags & CCDPF_MIRROR_DONE" is set to 0 on both of them. When a component returns to ccdiodone(), it checks if "cb_pflags & CCDPF_MIRROR_DONE" is set or not. If not, it sets the partner's flag and returns. If it is, it means its partner has already returned, so it will go to the regular cleanup (which is in the fallthrough code). There should be no performance or functionality changes unless the higher-level scsi driver does something with the resid value. The change is purely aesthetical and prepares us for the parity implementation.		1996-03-26 02:29:11 +00:00
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geom_ccd.c	Change how mirror writes are handled, according to the discussion on the	1996-03-26 02:29:11 +00:00