svn commit: r189573 - head/sys/sys

[Robert Watson]

Author: rwatson
Date: Mon Mar  9 13:12:48 2009
New Revision: 189573
URL: http://svn.freebsd.org/changeset/base/189573

Log:
  Use a u_int for p_lock instead of a char: this avoids a (somewhat
  unlikely but not impossible given modern thread counts) wrap-around,
  and the compiler was padding it out to an int (at least) anyway.
  
  MFC after:	3 days (but confirm ABI impact)

Modified:
  head/sys/sys/proc.h

Modified: head/sys/sys/proc.h
==============================================================================
--- head/sys/sys/proc.h	Mon Mar  9 13:11:16 2009	(r189572)
+++ head/sys/sys/proc.h	Mon Mar  9 13:12:48 2009	(r189573)
@@ -491,7 +491,7 @@ struct proc {
 	struct vnode	*p_tracevp;	/* (c + o) Trace to vnode. */
 	struct ucred	*p_tracecred;	/* (o) Credentials to trace with. */
 	struct vnode	*p_textvp;	/* (b) Vnode of executable. */
-	char		p_lock;		/* (c) Proclock (prevent swap) count. */
+	u_int		p_lock;		/* (c) Proclock (prevent swap) count. */
 	struct sigiolst	p_sigiolst;	/* (c) List of sigio sources. */
 	int		p_sigparent;	/* (c) Signal to parent on exit. */
 	int		p_sig;		/* (n) For core dump/debugger XXX. */