[Midnightbsd-cvs] src [7966] trunk/sys/amd64/amd64/fpu.c: stop caching

[laffer1 at midnightbsd.org]

Revision: 7966
          http://svnweb.midnightbsd.org/src/?rev=7966
Author:   laffer1
Date:     2016-09-14 19:35:46 -0400 (Wed, 14 Sep 2016)
Log Message:
-----------
stop caching

Modified Paths:
--------------
    trunk/sys/amd64/amd64/fpu.c

Modified: trunk/sys/amd64/amd64/fpu.c
===================================================================
--- trunk/sys/amd64/amd64/fpu.c	2016-09-14 23:35:14 UTC (rev 7965)
+++ trunk/sys/amd64/amd64/fpu.c	2016-09-14 23:35:46 UTC (rev 7966)
@@ -582,7 +582,6 @@
 void
 fpudna(void)
 {
-	struct pcb *pcb;
 
 	critical_enter();
 	if (PCPU_GET(fpcurthread) == curthread) {
@@ -604,11 +603,10 @@
 	 * Record new context early in case frstor causes a trap.
 	 */
 	PCPU_SET(fpcurthread, curthread);
-	pcb = curpcb;
 
 	fpu_clean_state();
 
-	if ((pcb->pcb_flags & PCB_FPUINITDONE) == 0) {
+	if ((curpcb->pcb_flags & PCB_FPUINITDONE) == 0) {
 		/*
 		 * This is the first time this thread has used the FPU or
 		 * the PCB doesn't contain a clean FPU state.  Explicitly
@@ -619,17 +617,17 @@
 		 * fpu_initialstate, to ignite the XSAVEOPT
 		 * tracking engine.
 		 */
-		bcopy(fpu_initialstate, pcb->pcb_save, cpu_max_ext_state_size);
-		fpurestore(pcb->pcb_save);
-		if (pcb->pcb_initial_fpucw != __INITIAL_FPUCW__)
-			fldcw(pcb->pcb_initial_fpucw);
-		if (PCB_USER_FPU(pcb))
-			set_pcb_flags(pcb,
+		bcopy(fpu_initialstate, curpcb->pcb_save, cpu_max_ext_state_size);
+		fpurestore(curpcb->pcb_save);
+		if (curpcb->pcb_initial_fpucw != __INITIAL_FPUCW__)
+			fldcw(curpcb->pcb_initial_fpucw);
+		if (PCB_USER_FPU(curpcb))
+			set_pcb_flags(curpcb,
 			    PCB_FPUINITDONE | PCB_USERFPUINITDONE);
 		else
-			set_pcb_flags(pcb, PCB_FPUINITDONE);
+			set_pcb_flags(curpcb, PCB_FPUINITDONE);
 	} else
-		fpurestore(pcb->pcb_save);
+		fpurestore(curpcb->pcb_save);
 	critical_exit();
 }
 
@@ -963,16 +961,14 @@
 int
 fpu_kern_thread(u_int flags)
 {
-	struct pcb *pcb;
 
-	pcb = curpcb;
 	KASSERT((curthread->td_pflags & TDP_KTHREAD) != 0,
 	    ("Only kthread may use fpu_kern_thread"));
-	KASSERT(pcb->pcb_save == get_pcb_user_save_pcb(pcb),
+	KASSERT(curpcb->pcb_save == get_pcb_user_save_pcb(curpcb),
 	    ("mangled pcb_save"));
-	KASSERT(PCB_USER_FPU(pcb), ("recursive call"));
+	KASSERT(PCB_USER_FPU(curpcb), ("recursive call"));
 
-	set_pcb_flags(pcb, PCB_KERNFPU);
+	set_pcb_flags(curpcb, PCB_KERNFPU);
 	return (0);
 }