From: Ben Gras <ben@minix3.org>
Date: Wed, 25 Oct 2006 13:38:31 +0000 (+0000)
Subject: Part of wait()/waitpid() fix in revision 2629:2634 in PM - kernel
X-Git-Tag: v3.1.3~160
X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/addsub.png?a=commitdiff_plain;h=65a1d219637f05e74689be63baf4fe056fb1a0db;p=minix.git

Part of wait()/waitpid() fix in revision 2629:2634 in PM - kernel
unblocks a process that has no priority (stopped with sys_nice()
and PRIO_STOP) and reschedules it if that gives it RTS flags of 0.
---

diff --git a/kernel/system/do_sigsend.c b/kernel/system/do_sigsend.c
index 9e082b6f7..5e84bc374 100644
--- a/kernel/system/do_sigsend.c
+++ b/kernel/system/do_sigsend.c
@@ -77,6 +77,12 @@ message *m_ptr;			/* pointer to request message */
   rp->p_reg.sp = (reg_t) frp;
   rp->p_reg.pc = (reg_t) smsg.sm_sighandler;
 
+  /* Reschedule if necessary. */
+  if(rp->p_rts_flags & NO_PRIORITY) {
+	rp->p_rts_flags &= ~NO_PRIORITY;
+	if (rp->p_rts_flags == 0) lock_enqueue(rp);
+  } else kprintf("system: warning: sigsend a running process\n");
+
   return(OK);
 }