Enhanced context switch performance

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1167 42af7a65-404d-4744-a932-0658087f49c3

arch/sh/src/common/up_blocktask.c

@@ -139,7 +139,7 @@ void up_block_task(_TCB *tcb, tstate_t task_state)
 
               /* Then switch contexts */
 
-              up_copystate(current_regs, rtcb->xcp.regs);
+              current_regs = rtcb->xcp.regs;
             }
 
           /* Copy the user C context into the TCB at the (old) head of the

arch/sh/src/common/up_releasepending.c

@@ -105,7 +105,7 @@ void up_release_pending(void)
 
           /* Then switch contexts */
 
-          up_copystate(current_regs, rtcb->xcp.regs);
+          current_regs = rtcb->xcp.regs;
         }
 
       /* Copy the exception context into the TCB of the task that

arch/sh/src/common/up_reprioritizertr.c

@@ -153,7 +153,7 @@ void up_reprioritize_rtr(_TCB *tcb, ubyte priority)
 
               /* Then switch contexts */
 
-              up_copystate(current_regs, rtcb->xcp.regs);
+              current_regs = rtcb->xcp.regs;
             }
 
           /* Copy the exception context into the TCB at the (old) head of the

arch/sh/src/common/up_unblocktask.c

@@ -131,7 +131,7 @@ void up_unblock_task(_TCB *tcb)
 
               /* Then switch contexts */
 
-              up_copystate(current_regs, rtcb->xcp.regs);
+              current_regs = rtcb->xcp.regs;
             }
 
           /* We are not in an interrupt handler.  Copy the user C context