[Crash-utility] [PATCH v2] add option -s and -S for subcommand irq

Re-posting two patch as attachments. I'm sorry for the problems on the first pass. I have tested the two patches on RHEL 5.8beta (x86, x86_64) , RHEL 6.2ga (x86, x86_64), and RHEL 6.2ga with kernel 3.2 (x86, x86_64). -- Hello Dave, The subcommand irq can dump the most of the irq information. Here I add some options to make some improvements for irq. 1. option '-s': display the cpu affinity for in-use IRQs. 2. option '-S' and '-c': display the percpu irq stats. -c is used to specify the cpu for which irq stats should be displayed. Without option -c, 'irq -S' displays the irq stats for all cpus. The output of this option is just like 'cat /proc/interrupts' shows. Two patches attched: -s: 0001-Add-s-option-for-irq-to-dump-the-cpu-affinity-of-in-.patch -S and -c: 0002-Add-S-and-c-option-for-irq-to-dump-the-kernel-irq-st.patch And the second patch is made at the base of the first patch. Thanks. Zhang Yanfei