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From: John Baldwin <jhb@FreeBSD.org>
Date: Thu, 31 Jul 2003 11:50:58 -0700 (PDT)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org,
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X-FreeBSD-CVS-Branch: HEAD
Subject: cvs commit: src/sys/kern subr_witness.c src/sys/sys lock.h
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jhb         2003/07/31 11:50:58 PDT

  FreeBSD src repository

  Modified files:
    sys/kern             subr_witness.c 
    sys/sys              lock.h 
  Log:
  Add a new function to look for a spinlock's instance when it is held by
  another thread.  We use the td_oncpu member of the other field to locate
  it's associated CPU and then search the that CPU's list of spin locks
  contained in its per-CPU data.  This is not always safe and may in fact
  panic or just not work, but it is useful in at least one case.
  
  Revision  Changes    Path
  1.157     +21 -0     src/sys/kern/subr_witness.c
  1.48      +1 -0      src/sys/sys/lock.h