svn commit: r332945 - head/sys/mips/mips

[John Baldwin]

Author: jhb
Date: Tue Apr 24 17:31:20 2018
New Revision: 332945
URL: https://svnweb.freebsd.org/changeset/base/332945

Log:
  Don't fetch the current instruction for faults on user "trap" instructions.
  
  The value of 'instr' was not used to handle the fault.
  
  Reported by:	GCC's -Wunused-but-set-variable

Modified:
  head/sys/mips/mips/trap.c

Modified: head/sys/mips/mips/trap.c
==============================================================================
--- head/sys/mips/mips/trap.c	Tue Apr 24 17:22:17 2018	(r332944)
+++ head/sys/mips/mips/trap.c	Tue Apr 24 17:31:20 2018	(r332945)
@@ -875,15 +875,12 @@ dofault:
 	case T_TRAP + T_USER:
 		{
 			intptr_t va;
-			uint32_t instr;
 			struct trapframe *locr0 = td->td_frame;
 
 			/* compute address of trap instruction */
 			va = trapframe->pc;
 			if (DELAYBRANCH(trapframe->cause))
 				va += sizeof(int);
-			/* read break instruction */
-			instr = fuword32((caddr_t)va);
 
 			if (DELAYBRANCH(trapframe->cause)) {	/* Check BD bit */
 				locr0->pc = MipsEmulateBranch(locr0, trapframe->pc, 0,