[MIPS] FP affinity: Coding style cleanups

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/kernel/mips-mt.c

@@ -109,7 +109,7 @@ asmlinkage long mipsmt_sys_sched_setaffinity(pid_t pid, unsigned int len,
 	read_unlock(&tasklist_lock);
 
 	/* Compute new global allowed CPU set if necessary */
-	if( (p->thread.mflags & MF_FPUBOUND)
+	if ((p->thread.mflags & MF_FPUBOUND)
 	&& cpus_intersects(new_mask, mt_fpu_cpumask)) {
 		cpus_and(effective_mask, new_mask, mt_fpu_cpumask);
 		retval = set_cpus_allowed(p, effective_mask);
@@ -195,27 +195,31 @@ void mips_mt_regdump(unsigned long mvpctl)
 	nvpe = ((mvpconf0 & MVPCONF0_PVPE) >> MVPCONF0_PVPE_SHIFT) + 1;
 	ntc = ((mvpconf0 & MVPCONF0_PTC) >> MVPCONF0_PTC_SHIFT) + 1;
 	printk("-- per-VPE State --\n");
-	for(i = 0; i < nvpe; i++) {
+	for (i = 0; i < nvpe; i++) {
-	    for(tc = 0; tc < ntc; tc++) {
+		for (tc = 0; tc < ntc; tc++) {
 			settc(tc);
-		if((read_tc_c0_tcbind() & TCBIND_CURVPE) == i) {
+			if ((read_tc_c0_tcbind() & TCBIND_CURVPE) == i) {
-		    printk("  VPE %d\n", i);
+				printk("  VPE %d\n", i);
-		    printk("   VPEControl : %08lx\n", read_vpe_c0_vpecontrol());
+				printk("   VPEControl : %08lx\n",
-		    printk("   VPEConf0 : %08lx\n", read_vpe_c0_vpeconf0());
+				       read_vpe_c0_vpecontrol());
-		    printk("   VPE%d.Status : %08lx\n",
+				printk("   VPEConf0 : %08lx\n",
-				i, read_vpe_c0_status());
+				       read_vpe_c0_vpeconf0());
-		    printk("   VPE%d.EPC : %08lx\n", i, read_vpe_c0_epc());
+				printk("   VPE%d.Status : %08lx\n",
-		    printk("   VPE%d.Cause : %08lx\n", i, read_vpe_c0_cause());
+				       i, read_vpe_c0_status());
-		    printk("   VPE%d.Config7 : %08lx\n",
+				printk("   VPE%d.EPC : %08lx\n",
-				i, read_vpe_c0_config7());
+				       i, read_vpe_c0_epc());
-		    break; /* Next VPE */
+				printk("   VPE%d.Cause : %08lx\n",
+				       i, read_vpe_c0_cause());
+				printk("   VPE%d.Config7 : %08lx\n",
+				       i, read_vpe_c0_config7());
+				break; /* Next VPE */
+			}
 		}
-	    }
 	}
 	printk("-- per-TC State --\n");
-	for(tc = 0; tc < ntc; tc++) {
+	for (tc = 0; tc < ntc; tc++) {
 		settc(tc);
-		if(read_tc_c0_tcbind() == read_c0_tcbind()) {
+		if (read_tc_c0_tcbind() == read_c0_tcbind()) {
 			/* Are we dumping ourself?  */
 			haltval = 0; /* Then we're not halted, and mustn't be */
 			tcstatval = flags; /* And pre-dump TCStatus is flags */
@@ -384,7 +388,7 @@ void mips_mt_set_cpuoptions(void)
 		mt_fpemul_threshold = fpaff_threshold;
 	} else {
 		mt_fpemul_threshold =
-			(FPUSEFACTOR * (loops_per_jiffy/(500000/HZ))) / HZ;
+			(FPUSEFACTOR * (loops_per_jiffy / (500000 / HZ))) / HZ;
 	}
 	printk("FPU Affinity set after %ld emulations\n",
 			mt_fpemul_threshold);

arch/mips/kernel/traps.c

@@ -752,6 +752,33 @@ asmlinkage void do_ri(struct pt_regs *regs)
 	force_sig(SIGILL, current);
 }
 
+/*
+ * MIPS MT processors may have fewer FPU contexts than CPU threads. If we've
+ * emulated more than some threshold number of instructions, force migration to
+ * a "CPU" that has FP support.
+ */
+static void mt_ase_fp_affinity(void)
+{
+#ifdef CONFIG_MIPS_MT_FPAFF
+	if (mt_fpemul_threshold > 0 &&
+	     ((current->thread.emulated_fp++ > mt_fpemul_threshold))) {
+		/*
+		 * If there's no FPU present, or if the application has already
+		 * restricted the allowed set to exclude any CPUs with FPUs,
+		 * we'll skip the procedure.
+		 */
+		if (cpus_intersects(current->cpus_allowed, mt_fpu_cpumask)) {
+			cpumask_t tmask;
+
+			cpus_and(tmask, current->thread.user_cpus_allowed,
+			         mt_fpu_cpumask);
+			set_cpus_allowed(current, tmask);
+			current->thread.mflags |= MF_FPUBOUND;
+		}
+	}
+#endif /* CONFIG_MIPS_MT_FPAFF */
+}
+
 asmlinkage void do_cpu(struct pt_regs *regs)
 {
 	unsigned int cpid;
@@ -785,36 +812,8 @@ asmlinkage void do_cpu(struct pt_regs *regs)
 						&current->thread.fpu, 0);
 			if (sig)
 				force_sig(sig, current);
-#ifdef CONFIG_MIPS_MT_FPAFF
+			else
-			else {
+				mt_ase_fp_affinity();
-			/*
-			 * MIPS MT processors may have fewer FPU contexts
-			 * than CPU threads. If we've emulated more than
-			 * some threshold number of instructions, force
-			 * migration to a "CPU" that has FP support.
-			 */
-			 if(mt_fpemul_threshold > 0
-			 && ((current->thread.emulated_fp++
-			    > mt_fpemul_threshold))) {
-			  /*
-			   * If there's no FPU present, or if the
-			   * application has already restricted
-			   * the allowed set to exclude any CPUs
-			   * with FPUs, we'll skip the procedure.
-			   */
-			  if (cpus_intersects(current->cpus_allowed,
-			  			mt_fpu_cpumask)) {
-			    cpumask_t tmask;
-
-			    cpus_and(tmask,
-					current->thread.user_cpus_allowed,
-					mt_fpu_cpumask);
-			    set_cpus_allowed(current, tmask);
-			    current->thread.mflags |= MF_FPUBOUND;
-			  }
-			 }
-			}
-#endif /* CONFIG_MIPS_MT_FPAFF */
 		}
 
 		return;

include/asm-mips/system.h

@@ -44,7 +44,7 @@ struct task_struct;
  * different thread.
  */
 
-#define switch_to(prev,next,last)					\
+#define __mips_mt_fpaff_switch_to(prev)					\
 do {									\
 	if (cpu_has_fpu &&						\
 	    (prev->thread.mflags & MF_FPUBOUND) &&			\
@@ -52,24 +52,22 @@ do {									\
 		prev->thread.mflags &= ~MF_FPUBOUND;			\
 		prev->cpus_allowed = prev->thread.user_cpus_allowed;	\
 	}								\
-	if (cpu_has_dsp)						\
-		__save_dsp(prev);					\
 	next->thread.emulated_fp = 0;					\
-	(last) = resume(prev, next, task_thread_info(next));		\
-	if (cpu_has_dsp)						\
-		__restore_dsp(current);					\
 } while(0)
 
 #else
+#define __mips_mt_fpaff_switch_to(prev) do { (prev); } while (0)
+#endif
+
 #define switch_to(prev,next,last)					\
 do {									\
+	__mips_mt_fpaff_switch_to(prev);				\
 	if (cpu_has_dsp)						\
 		__save_dsp(prev);					\
 	(last) = resume(prev, next, task_thread_info(next));		\
 	if (cpu_has_dsp)						\
 		__restore_dsp(current);					\
 } while(0)
-#endif
 
 /*
  * On SMP systems, when the scheduler does migration-cost autodetection,