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Commit 8e102301 authored by Heiko Carstens's avatar Heiko Carstens Committed by Martin Schwidefsky
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[S390] prevent unneccesary loops_per_jiffy recalculation 



When the seqfile /proc/cpuinfo gets accesses for each possible cpu
loops_per_jiffy gets recalculated. However its value is only needed
on first access.
In addition loops_per_jiffy should be recalculated when the machine
reports a capability change.

Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 19726cec

arch/s390/kernel/processor.c

+1 −1
Original line number Diff line number Diff line
@@ -46,8 +46,8 @@ static int show_cpuinfo(struct seq_file *m, void *v) 
	unsigned long n = (unsigned long) v - 1;

	int i;



	s390_adjust_jiffies();

	if (!n) {

		s390_adjust_jiffies();

		seq_printf(m, "vendor_id       : IBM/S390\n"

			   "# processors    : %i\n"

			   "bogomips per cpu: %lu.%02lu\n",

drivers/s390/char/sclp_config.c

+1 −0
Original line number Diff line number Diff line
@@ -33,6 +33,7 @@ static void sclp_cpu_capability_notify(struct work_struct *work) 
	int cpu;

	struct sys_device *sysdev;



	s390_adjust_jiffies();

	pr_warning("cpu capability changed.\n");

	get_online_cpus();

	for_each_online_cpu(cpu) {