CVS commit: src/sys/kern

[Andrew Doran <ad%netbsd.org@localhost>]

Module Name:    src
Committed By:   ad
Date:           Mon Jun 16 10:02:15 UTC 2008

Modified Files:
        src/sys/kern: kern_sleepq.c

Log Message:
PR kern/38761: new (?) race in buffer cache code

sleepq_changepri, sleepq_lendpri: don't let an active sleep queue head become
empty. The condvar code inspects the queue head without holding the sleep
queue lock and needs to see a non-empty queue if there are waiters.


To generate a diff of this commit:
cvs rdiff -r1.31 -r1.32 src/sys/kern/kern_sleepq.c

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