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/freebsd-10.1-release/sys/dev/isp/
H A Disp_freebsd.hdiff 260347 Sun Jan 05 20:52:52 MST 2014 mav MFC r257932:
Use relaxed (write-only) memory barriers when writing some of queue index
registers (for now on ISP2400+). We never read those registers back and
AFAIK their semantics does not require any immediate reaction on write.
H A Disp_pci.cdiff 260347 Sun Jan 05 20:52:52 MST 2014 mav MFC r257932:
Use relaxed (write-only) memory barriers when writing some of queue index
registers (for now on ISP2400+). We never read those registers back and
AFAIK their semantics does not require any immediate reaction on write.

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