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MFC 217292:
authorjhb <jhb@ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f>
Fri, 4 Feb 2011 16:30:13 +0000 (16:30 +0000)
committerjhb <jhb@ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f>
Fri, 4 Feb 2011 16:30:13 +0000 (16:30 +0000)
commit37cd51e20526cb401cbd1a171a55fc79a8f82713
treee4f6c374f2ca1dbc96f25997e6ec23f4518a5233
parent864f26d8e9ef522ad5e51c133b8f359fa8411814
MFC 217292:
- Retire some unused ithread priorities: PI_TTYHIGH, PI_TAPE, and
  PI_DISKLOW.  While here, rename PI_TTYLOW to PI_TTY.
- Add a macro PI_SWI() that takes a SWI_* constant as an argument and
  returns the suitable thread priority.

To preserve the KBI, I did not renumber priorities but simply removed
unused ones.

git-svn-id: svn://svn.freebsd.org/base/stable/8@218283 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
sys/kern/kern_intr.c
sys/sys/priority.h