- Merge struct procsig with struct sigacts.

- Move struct sigacts out of the u-area and malloc() it using the
  M_SUBPROC malloc bucket.
- Add a small sigacts_*() API for managing sigacts structures: sigacts_alloc(),
  sigacts_free(), sigacts_copy(), sigacts_share(), and sigacts_shared().
- Remove the p_sigignore, p_sigacts, and p_sigcatch macros.
- Add a mutex to struct sigacts that protects all the members of the struct.
- Add sigacts locking.
- Remove Giant from nosys(), kill(), killpg(), and kern_sigaction() now
  that sigacts is locked.
- Several in-kernel functions such as psignal(), tdsignal(), trapsignal(),
  and thread_stopped() are now MP safe.

Reviewed by:	arch@
Approved by:	re (rwatson)

1 files changed, 6 insertions, 2 deletions

diff --git a/sys/compat/linprocfs/linprocfs.c b/sys/compat/linprocfs/linprocfs.c
index 033346b..14f9aeb 100644
--- a/sys/compat/linprocfs/linprocfs.c
+++ b/sys/compat/linprocfs/linprocfs.c
@@ -547,6 +547,7 @@ linprocfs_doprocstatus(PFS_FILL_ARGS)
 	char *state;
 	segsz_t lsize;
 	struct thread *td2;
+	struct sigacts *ps;
 	int i;
 
 	PROC_LOCK(p);
@@ -653,8 +654,11 @@ linprocfs_doprocstatus(PFS_FILL_ARGS)
 	 * relation to struct proc, so SigBlk is left unimplemented.
 	 */
 	sbuf_printf(sb, "SigBlk:\t%08x\n",	0); /* XXX */
-	sbuf_printf(sb, "SigIgn:\t%08x\n",	p->p_sigignore.__bits[0]);
-	sbuf_printf(sb, "SigCgt:\t%08x\n",	p->p_sigcatch.__bits[0]);
+	ps = p->p_sigacts;
+	mtx_lock(&ps->ps_mtx);
+	sbuf_printf(sb, "SigIgn:\t%08x\n",	ps->ps_sigignore.__bits[0]);
+	sbuf_printf(sb, "SigCgt:\t%08x\n",	ps->ps_sigcatch.__bits[0]);
+	mtx_unlock(&ps->ps_mtx);
 	PROC_UNLOCK(p);
 	
 	/*