CVS commit: syssrc

[Jason R Thorpe <thorpej%netbsd.org@localhost>]

Module Name:    syssrc
Committed By:   thorpej
Date:           Tue Jul 27 21:29:17 UTC 1999

Modified Files:
        syssrc/sys/kern: kern_lock.c
        syssrc/sys/sys: lock.h

Log Message:
Improve the LOCKDEBUG code:
- Now compatible with MULTIPROCESSOR (requires other changes not yet
  committed, but which will be later today).
- In addition to tracking simple locks, track exclusive spin locks.
- Count spin locks like we do sleep locks (in the cpu_info for this
  CPU).
- Lock debug lists are now TAILQs, so as to make the locking order
  more obvious when dumping the list.

Also, some suggestions from Bill Sommerfeld:
- SIMPLELOCK_LOCKED and SIMPLELOCK_UNLOCKED constants, which may be
  defined in <machine/lock.h> (default to 1 and 0, respectively).  This
  makes it easier to support architectures which use test-and-clear
  rather than test-and-set.
- Add __attribute__((__aligned__)) to the `lock_data' member of the
  simplelock structure.  This makes it easier to support architectures
  which can only perform atomic operations on very-well-aligned memory
  locations.  NOTE: This changes the size of struct simplelock, and
  will cause a version bump.


To generate a diff of this commit:
cvs rdiff -r1.20 -r1.21 syssrc/sys/kern/kern_lock.c
cvs rdiff -r1.19 -r1.20 syssrc/sys/sys/lock.h

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.