MIPS: DSP: eleminate used_dsp. used_dsp was meant to be used like used_math - but since the FPU context is small and lazy context switching is a stupid idea on multiprocessors this idea only got halfway implemented and those bits are were now breaking ptrace.

Signed-off-by: Ralf Baechle <[e-mail]>

arch/mips/kernel/ptrace.c

···
 				ret = -EIO;
 				goto out;
 			}
-			if (child->thread.dsp.used_dsp) {
-				dregs = __get_dsp_regs(child);
-				tmp = (unsigned long) (dregs[addr - DSP_BASE]);
-			} else {
-				tmp = -1;	/* DSP registers yet used  */
-			}
+			dregs = __get_dsp_regs(child);
+			tmp = (unsigned long) (dregs[addr - DSP_BASE]);
 			break;
 		}
 		case DSP_CONTROL:

arch/mips/kernel/ptrace32.c

···
 				ret = -EIO;
 				goto out_tsk;
 			}
-			if (child->thread.dsp.used_dsp) {
-				dspreg_t *dregs = __get_dsp_regs(child);
-				tmp = (unsigned long) (dregs[addr - DSP_BASE]);
-			} else {
-				tmp = -1;	/* DSP registers yet used  */
-			}
+			dspreg_t *dregs = __get_dsp_regs(child);
+			tmp = (unsigned long) (dregs[addr - DSP_BASE]);
 			break;
 		case DSP_CONTROL:
 			if (!cpu_has_dsp) {

include/asm-mips/processor.h

···
 struct mips_dsp_state {
 	dspreg_t        dspr[NUM_DSP_REGS];
 	unsigned int    dspcontrol;
-	unsigned short	used_dsp;
 };
 
 #define INIT_DSP {{0,},}