Remove redundant code to drop per-thread debug register state from

cpu_exit() as this is already performed in cpu_thread_exit() and the
debug state is per-thread rather than per-process.

2 files changed, 1 insertions, 14 deletions

diff --git a/sys/amd64/amd64/vm_machdep.c b/sys/amd64/amd64/vm_machdep.c
index b144dfb..d784d02 100644
--- a/sys/amd64/amd64/vm_machdep.c
+++ b/sys/amd64/amd64/vm_machdep.c
@@ -185,13 +185,6 @@ cpu_set_fork_handler(td, func, arg)
 void
 cpu_exit(struct thread *td)
 {
-	struct pcb *pcb = td->td_pcb;
-
-	if (pcb->pcb_flags & PCB_DBREGS) {
-		/* disable all hardware breakpoints */
-		reset_dbregs();
-		pcb->pcb_flags &= ~PCB_DBREGS;
-	}
 }
 
 void
diff --git a/sys/i386/i386/vm_machdep.c b/sys/i386/i386/vm_machdep.c
index cc98727..1b002dc 100644
--- a/sys/i386/i386/vm_machdep.c
+++ b/sys/i386/i386/vm_machdep.c
@@ -291,8 +291,6 @@ void
 cpu_exit(struct thread *td)
 {
 	struct mdproc *mdp;
-	struct pcb *pcb = td->td_pcb; 
-
 
 	/* Reset pc->pcb_gs and %gs before possibly invalidating it. */
 	mdp = &td->td_proc->p_md;
@@ -301,17 +299,13 @@ cpu_exit(struct thread *td)
 		load_gs(_udatasel);
 		user_ldt_free(td);
 	}
-	if (pcb->pcb_flags & PCB_DBREGS) {
-		/* disable all hardware breakpoints */
-		reset_dbregs();
-		pcb->pcb_flags &= ~PCB_DBREGS;
-	}
 }
 
 void
 cpu_thread_exit(struct thread *td)
 {
 	struct pcb *pcb = td->td_pcb; 
+
 #ifdef DEV_NPX
 	if (td == PCPU_GET(fpcurthread))
 		npxdrop();