what does smp_cross_call does?

Jacky lin h.t.jacky at gmail.com
Tue Jun 26 13:02:19 EDT 2012

Hi all,

Could any one tell me what does smp_cross_call() means?

My device (Dual call) encounter a soft lockup here with following info:

[  101.654724:0] PC is at generic_exec_single+0x7c/0x94
[  101.659698:0] LR is at arch_send_call_function_single_ipi+0x3c/0x48

I check the code, and find the LR is point to smp_cross_call()

void arch_send_call_function_single_ipi(int cpu)
    smp_cross_call(cpumask_of(cpu), IPI_CALL_FUNC_SINGLE);

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