[Crash-utility] [PATCH v2 13/25] modify irq -a to hide offline cpus' data

irq -a will dump cpu affinity for irqs. This patch will hide offline cpus. The original output is like below: <cut> crash> irq -a IRQ NAME AFFINITY 0 timer 0-3 1 i8042 0 6 floppy 0-3 8 rtc0 0-3 ... <cut> With data of offline cpu(cpu #2) hiden, the output is like below: <cut> crash> irq -a IRQ NAME AFFINITY 0 timer 0-1,3 1 i8042 0 6 floppy 0-1,3 8 rtc0 0-1,3 ... <cut> Signed-off-by: Qiao Nuohan <qiaonuohan(a)cn.fujitsu.com&gt; --- kernel.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/kernel.c b/kernel.c index 758edcf..8063d61 100755 --- a/kernel.c +++ b/kernel.c @@ -5733,14 +5733,19 @@ get_irq_desc_addr(int irq) static void display_cpu_affinity(ulong *mask) { - int cpu, seq, start, count; + int cpu, seq, start, count, cpu_exist; seq = FALSE; start = 0; count = 0; for (cpu = 0; cpu < kt->cpus; ++cpu) { - if (NUM_IN_BITMAP(mask, cpu)) { + /* + * on X86_64, offline cpu should not be displayed. + */ + cpu_exist = !hide_offline_cpu(cpu) && NUM_IN_BITMAP(mask, cpu); + + if (cpu_exist) { if (seq) continue; start = cpu; @@ -5757,6 +5762,9 @@ display_cpu_affinity(ulong *mask) } } + /* + * when seq is TRUE, the following cpus cannot be offline. + */ if (seq) { if (count) fprintf(fp, ","); -- 1.8.5.3