MIPS: Replace hardcoded 32 with NUM_FPU_REGS in ptrace

NUM_FPU_REGS just makes it clearer what's going on, rather than the
magic hard coded 32.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/6424/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/kernel/signal.c

@@ -69,7 +69,7 @@ static int copy_fp_to_sigcontext(struct sigcontext __user *sc)
 	int i;
 	int err = 0;
 
-	for (i = 0; i < 32; i++) {
+	for (i = 0; i < NUM_FPU_REGS; i++) {
 		err |=
 		    __put_user(get_fpr64(&current->thread.fpu.fpr[i], 0),
 			       &sc->sc_fpregs[i]);
@@ -85,7 +85,7 @@ static int copy_fp_from_sigcontext(struct sigcontext __user *sc)
 	int err = 0;
 	u64 fpr_val;
 
-	for (i = 0; i < 32; i++) {
+	for (i = 0; i < NUM_FPU_REGS; i++) {
 		err |= __get_user(fpr_val, &sc->sc_fpregs[i]);
 		set_fpr64(&current->thread.fpu.fpr[i], 0, fpr_val);
 	}

arch/mips/kernel/signal32.c

@@ -84,7 +84,7 @@ static int copy_fp_to_sigcontext32(struct sigcontext32 __user *sc)
 	int err = 0;
 	int inc = test_thread_flag(TIF_32BIT_FPREGS) ? 2 : 1;
 
-	for (i = 0; i < 32; i += inc) {
+	for (i = 0; i < NUM_FPU_REGS; i += inc) {
 		err |=
 		    __put_user(get_fpr64(&current->thread.fpu.fpr[i], 0),
 			       &sc->sc_fpregs[i]);
@@ -101,7 +101,7 @@ static int copy_fp_from_sigcontext32(struct sigcontext32 __user *sc)
 	int inc = test_thread_flag(TIF_32BIT_FPREGS) ? 2 : 1;
 	u64 fpr_val;
 
-	for (i = 0; i < 32; i += inc) {
+	for (i = 0; i < NUM_FPU_REGS; i += inc) {
 		err |= __get_user(fpr_val, &sc->sc_fpregs[i]);
 		set_fpr64(&current->thread.fpu.fpr[i], 0, fpr_val);
 	}