commit: http://blackfin.uclinux.org/git/?p=linux-kernel;a=commitdiff;h=e9fc52332b446ef6a5d3a79bc93de3977a8ebb79 branch: http://blackfin.uclinux.org/git/?p=linux-kernel;a=shortlog;h=refs/heads/trunk
Current smp_call_function_single generic API is changed to avoid raise IPI and call function in IPI handler on the same core. But this is necessary to support KGDB to switch master core in SMP case. So, call generic_exec_single diretly instead of smp_call_function_single. Signed-off-by: Sonic Zhang <[email protected]> --- arch/blackfin/kernel/kgdb.c | 13 +++++++++++-- 1 files changed, 11 insertions(+), 2 deletions(-) diff --git a/arch/blackfin/kernel/kgdb.c b/arch/blackfin/kernel/kgdb.c index 9b80b15..b882ce2 100644 --- a/arch/blackfin/kernel/kgdb.c +++ b/arch/blackfin/kernel/kgdb.c @@ -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
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