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Commit 1439d030 authored by Sonic Zhang's avatar Sonic Zhang Committed by Bob Liu
Browse files

blackfin: kgdb: call generic_exec_single() directly 



Current generic API smp_call_function_single() is changed to avoid raise IPI
and call function in IPI handler on the same core which is necessary to support
KGDB switch master core in SMP case, so call generic_exec_single() directly
instead of smp_call_function_single().

Signed-off-by: default avatarSonic Zhang <sonic.zhang@analog.com>
Signed-off-by: default avatarBob Liu <lliubbo@gmail.com>
parent f1a1d525

arch/blackfin/kernel/kgdb.c

+11 −2
Original line number Diff line number Diff line
@@ -329,6 +329,9 @@ static void bfin_disable_hw_debug(struct pt_regs *regs) 
}



#ifdef CONFIG_SMP

extern void generic_exec_single(int cpu, struct call_single_data *data, int wait);

static struct call_single_data kgdb_smp_ipi_data[NR_CPUS];



void kgdb_passive_cpu_callback(void *info)

{

	kgdb_nmicallback(raw_smp_processor_id(), get_irq_regs());
@@ -336,12 +339,18 @@ void kgdb_passive_cpu_callback(void *info) 


void kgdb_roundup_cpus(unsigned long flags)

{

	smp_call_function(kgdb_passive_cpu_callback, NULL, 0);

	unsigned int cpu;



	for (cpu = cpumask_first(cpu_online_mask); cpu < nr_cpu_ids;

		cpu = cpumask_next(cpu, cpu_online_mask)) {

		kgdb_smp_ipi_data[cpu].func = kgdb_passive_cpu_callback;

		generic_exec_single(cpu, &kgdb_smp_ipi_data[cpu], 0);

	}

}



void kgdb_roundup_cpu(int cpu, unsigned long flags)

{

	smp_call_function_single(cpu, kgdb_passive_cpu_callback, NULL, 0);

	generic_exec_single(cpu, &kgdb_smp_ipi_data[cpu], 0);

}

#endif