CVS commit: syssrc

[Bill Sommerfeld <sommerfeld%netbsd.org@localhost>]

Module Name:    syssrc
Committed By:   sommerfeld
Date:           Wed Feb  9 16:46:11 UTC 2000

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

Log Message:
Three MULTIPROCESSOR + LOCKDEBUG fixes:
1) fix typo preventing compilation (missing comma).
2) in SLOCK_WHERE, display cpu number in the MP case.
3) the folowing race condition was observed in _simple_lock:
        cpu 1 releases lock,
        cpu 0 grabs lock
        cpu 1 sees it's already locked.
        cpu 1 sees that lock_holder== "cpu 1"
        cpu 1 assumes that it already holds it and barfs.
        cpu 0 sets lock_holder == "cpu 0"
Fix: set lock_holder to LK_NOCPU in _simple_unlock().


To generate a diff of this commit:
cvs rdiff -r1.25 -r1.26 syssrc/sys/kern/kern_lock.c

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