- 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, 3 insertions, 0 deletions

diff --git a/sys/alpha/osf1/osf1_signal.c b/sys/alpha/osf1/osf1_signal.c
index bc3e06c..4ba7e86 100644
--- a/sys/alpha/osf1/osf1_signal.c
+++ b/sys/alpha/osf1/osf1_signal.c
@@ -471,6 +471,7 @@ osf1_sendsig(sig_t catcher, int sig, sigset_t *mask, u_long code)
 	p = td->td_proc;
 	PROC_LOCK_ASSERT(p, MA_OWNED);
 	psp = p->p_sigacts;
+	mtx_assert(&psp->ps_mtx, MA_OWNED);
 
 	frame = td->td_frame;
 	oonstack = sigonstack(alpha_pal_rdusp());
@@ -490,6 +491,7 @@ osf1_sendsig(sig_t catcher, int sig, sigset_t *mask, u_long code)
 		p->p_sigstk.ss_flags |= SS_ONSTACK;
 	} else
 		sip = (osiginfo_t *)(alpha_pal_rdusp() - rndfsize);
+	mtx_unlock(&psp->ps_mtx);
 	PROC_UNLOCK(p);
 
 	/*
@@ -551,6 +553,7 @@ osf1_sendsig(sig_t catcher, int sig, sigset_t *mask, u_long code)
 	frame->tf_regs[FRAME_FLAGS] = 0;   	/* full restore */
 	alpha_pal_wrusp((unsigned long)sip);
 	PROC_LOCK(p);
+	mtx_lock(&psp->ps_mtx);
 }