Blackfin: drop per-cpu loops_per_jiffy tracking

On Blackfin SMP, a per-cpu loops_per_jiffy is pointless since both cores
always run at the same CCLK.  In addition, the current implementation has
flaws since the main consumer for loops_per_jiffy (asm/delay.h) uses the
global kernel loops_per_jiffy and not the per_cpu one.  So punt all of the
per-cpu handling and go back to the global shared one.
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

arch/blackfin/include/asm/cpu.h

@@ -32,7 +32,6 @@ struct blackfin_cpudata {
 	struct task_struct *idle;
 	unsigned int imemctl;
 	unsigned int dmemctl;
-	unsigned long loops_per_jiffy;
 	unsigned long dcache_invld_count;
 	unsigned long icache_invld_count;
 };

arch/blackfin/kernel/setup.c

@@ -168,7 +168,6 @@ void __cpuinit bfin_setup_cpudata(unsigned int cpu)
 	struct blackfin_cpudata *cpudata = &per_cpu(cpu_data, cpu);
 
 	cpudata->idle = current;
-	cpudata->loops_per_jiffy = loops_per_jiffy;
 	cpudata->imemctl = bfin_read_IMEM_CONTROL();
 	cpudata->dmemctl = bfin_read_DMEM_CONTROL();
 }
@@ -1159,9 +1158,9 @@ static int show_cpuinfo(struct seq_file *m, void *v)
 		sclk/1000000, sclk%1000000);
 	seq_printf(m, "bogomips\t: %lu.%02lu\n"
 		"Calibration\t: %lu loops\n",
-		(cpudata->loops_per_jiffy * HZ) / 500000,
-		((cpudata->loops_per_jiffy * HZ) / 5000) % 100,
-		(cpudata->loops_per_jiffy * HZ));
+		(loops_per_jiffy * HZ) / 500000,
+		((loops_per_jiffy * HZ) / 5000) % 100,
+		(loops_per_jiffy * HZ));
 
 	/* Check Cache configutation */
 	switch (cpudata->dmemctl & (1 << DMC0_P | 1 << DMC1_P)) {

arch/blackfin/mach-common/smp.c

@@ -450,7 +450,7 @@ void __init smp_cpus_done(unsigned int max_cpus)
 	unsigned int cpu;
 
 	for_each_online_cpu(cpu)
-		bogosum += per_cpu(cpu_data, cpu).loops_per_jiffy;
+		bogosum += loops_per_jiffy;
 
 	printk(KERN_INFO "SMP: Total of %d processors activated "
 	       "(%lu.%02lu BogoMIPS).\n",