- 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, 4 insertions, 0 deletions

diff --git a/sys/sparc64/sparc64/machdep.c b/sys/sparc64/sparc64/machdep.c
index 6cf0f6af2df8..669f4c7b30f5 100644
--- a/sys/sparc64/sparc64/machdep.c
+++ b/sys/sparc64/sparc64/machdep.c
@@ -403,7 +403,9 @@ sendsig(sig_t catcher, int sig, sigset_t *mask, u_long code)
 	oonstack = 0;
 	td = curthread;
 	p = td->td_proc;
+	PROC_LOCK_ASSERT(p, MA_OWNED);
 	psp = p->p_sigacts;
+	mtx_assert(&psp->ps_mtx, MA_OWNED);
 	tf = td->td_frame;
 	sp = tf->tf_sp + SPOFF;
 	oonstack = sigonstack(sp);
@@ -437,6 +439,7 @@ sendsig(sig_t catcher, int sig, sigset_t *mask, u_long code)
 		    p->p_sigstk.ss_size - sizeof(struct sigframe));
 	} else
 		sfp = (struct sigframe *)sp - 1;
+	mtx_unlock(&psp->ps_mtx);
 	PROC_UNLOCK(p);
 
 	fp = (struct frame *)sfp - 1;
@@ -476,6 +479,7 @@ sendsig(sig_t catcher, int sig, sigset_t *mask, u_long code)
 	    tf->tf_sp);
 
 	PROC_LOCK(p);
+	mtx_lock(&psp->ps_mtx);
 }
 
 #ifndef	_SYS_SYSPROTO_H_