cvs commit: src/sys/alpha/alpha busdma_machdep.c

[John Baldwin]

jhb         2005-09-26 19:35:33 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_6)
    sys/alpha/alpha      busdma_machdep.c 
  Log:
  MFC: Add a memory barrier for PREWRITE operations to ensure all writes by
  the CPU have drained before further writes to kick off the DMA operation.
  
  Approved by:    re (kensmith)
  
  Revision  Changes    Path
  1.51.2.1  +4 -0      src/sys/alpha/alpha/busdma_machdep.c