Jeff Roberson fade8dd714 Refactor unmapped buffer address handling. ... - Use pointer assignment rather than a combination of pointers and flags to switch buffers between unmapped and mapped. This eliminates multiple flags and generally simplifies the logic. - Eliminate b_saveaddr since it is only used with pager bufs which have their b_data re-initialized on each allocation. - Gather up some convenience routines in the buffer cache for manipulating buf space and buf malloc space. - Add an inline, buf_mapped(), to standardize checks around unmapped buffers. In collaboration with: mlaier Reviewed by: kib Tested by: pho (many small revisions ago) Sponsored by: EMC / Isilon Storage Division		2015-07-23 19:13:41 +00:00
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ffs	Refactor unmapped buffer address handling.	2015-07-23 19:13:41 +00:00
ufs	Remove several write-only variables, all reported by the gcc 4.9	2015-05-29 13:24:17 +00:00