cvs commit: src/sys/amd64/isa atpic.c src/sys/i386/isa atpic.c

John Baldwin jhb at
Thu Mar 20 14:53:28 PDT 2008

jhb         2008-03-20 21:53:27 UTC

  FreeBSD src repository

  Modified files:
    sys/amd64/isa        atpic.c 
    sys/i386/isa         atpic.c 
  Explicitly use spinlock_enter/exit rather than locking the icu_lock spin
  lock in the 8259A drivers as these drivers are only used on UP systems.
  This slightly reduces the penalty of an SMP kernel (such as GENERIC) on
  a UP x86 machine.
  Revision  Changes    Path
  1.24      +14 -15    src/sys/amd64/isa/atpic.c
  1.30      +14 -15    src/sys/i386/isa/atpic.c

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