v2 booke/kprobe: Fix stack corrupt issue when kprobe 'stwu'
From: Tiejun Chen <hidden>
Date: 2011-07-11 02:36:33
v1 -> v2: when allocate pgirq_ctx, use 'hw_cpu' to identify cpu ID in exc_lvl_early_init(). BTW, I already validated these patches on fsl mpc8536 by kprobe do_fork() and show_interrupts(). Note this bug I fixed is from another email thread, "[BUG?]3.0-rc4+ftrace+kprobe: set kprobe at instruction 'stwu' lead to system crash/freeze", Yong Zhang, [off-list ref] previously reported. Tiejun