Push Giant down a little further:

- no longer serialize on Giant for thread_single*() and family in fork,
  exit and exec
- thread_wait() is mpsafe, assert no Giant
- reduce scope of Giant in exit to not cover thread_wait and just do
  vm_waitproc().
- assert that thread_single() family are not called with Giant
- remove the DROP/PICKUP_GIANT macros from thread_single() family
- assert that thread_suspend_check() s not called with Giant
- remove manual drop_giant hack in thread_suspend_check since we know it
  isn't held.
- remove the DROP/PICKUP_GIANT macros from thread_suspend_check() family
- mark kse_create() mpsafe

1 files changed, 1 insertions, 2 deletions

diff --git a/sys/kern/subr_trap.c b/sys/kern/subr_trap.c
index 3e40672..9d17208 100644
--- a/sys/kern/subr_trap.c
+++ b/sys/kern/subr_trap.c
@@ -114,9 +114,8 @@ userret(td, frame, oticks)
 	/*
 	 * Do special thread processing, e.g. upcall tweaking and such.
 	 */
-	if (p->p_flag & P_SA) {
+	if (p->p_flag & P_SA)
 		thread_userret(td, frame);
-	}
 
 	/*
 	 * Charge system time if profiling.