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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2015-08-20 17:28:44 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2015-10-14 14:32:06 +0200 |
| commit | 1ec2772e0c3ca3159035c03165355e355efc326b (patch) | |
| tree | 469be3ba9032d367e4a796d6a31b25ccaab0d06a /arch/s390/kernel/processor.c | |
| parent | s390/bitops: implement cache friendly test_and_set_bit_lock (diff) | |
| download | linux-1ec2772e0c3ca3159035c03165355e355efc326b.tar.xz linux-1ec2772e0c3ca3159035c03165355e355efc326b.zip | |
s390/diag: add a statistic for diagnose calls
Introduce /sys/debug/kernel/diag_stat with a statistic how many diagnose
calls have been done by each CPU in the system.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/processor.c')
| -rw-r--r-- | arch/s390/kernel/processor.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/s390/kernel/processor.c b/arch/s390/kernel/processor.c index e6e077ae3990..7ce00e7a709a 100644 --- a/arch/s390/kernel/processor.c +++ b/arch/s390/kernel/processor.c @@ -11,6 +11,7 @@ #include <linux/seq_file.h> #include <linux/delay.h> #include <linux/cpu.h> +#include <asm/diag.h> #include <asm/elf.h> #include <asm/lowcore.h> #include <asm/param.h> @@ -20,8 +21,10 @@ static DEFINE_PER_CPU(struct cpuid, cpu_id); void notrace cpu_relax(void) { - if (!smp_cpu_mtid && MACHINE_HAS_DIAG44) + if (!smp_cpu_mtid && MACHINE_HAS_DIAG44) { + diag_stat_inc(DIAG_STAT_X044); asm volatile("diag 0,0,0x44"); + } barrier(); } EXPORT_SYMBOL(cpu_relax); |