The current state of flags in the proc structure is the following:

#define	P_EXEC		0x04000	/* Process called exec. */
#define	P_FSTRACE	0x10000	/* Don't send SIGCHLD to parent on stop. */

/* Should be moved to machine-dependent areas. */
#define	P_OWEUPC	0x08000	/* Owe process an addupc() call at next ast. */
#define	P_SSTEP		0x20000	/* Process needs single-step fixup. */

I would like to add P_NOCLDWAIT and SA_NOCLDWAIT  which will avoid creating
zombies... As I was looking at the flags though, I noticed the following:

- P_SSTEP in not used anywhere
- P_OWEUPC is used by most ports, so I don't think that it is worth while to
  move it to mdproc.
- P_FSTRACE description is not very good.

I would like to make the following changes:

#define	P_EXEC		0x04000	/* Process called exec. */
#define	P_OWEUPC	0x08000	/* Owe process an addupc() call at next ast. */
#define	P_FSTRACE	0x10000	/* Debugged process being traced by procfs */
#define P_NOCLDWAIT	0x20000	/* Exiting children do not produce zombies */

Ok?

christos