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| author | Sonic Zhang <sonic.zhang@analog.com> | 2012-11-01 17:07:09 +0800 |
|---|---|---|
| committer | Bob Liu <lliubbo@gmail.com> | 2012-12-13 15:28:40 +0800 |
| commit | 1439d030b9032261f1111a2dd16b9a8ca11112ef (patch) | |
| tree | c63035724cef845a0c8b8b17904dd142dbdd0984 /arch/blackfin | |
| parent | f1a1d52508bd29c68a7f77412c0a9cf5e1b51154 (diff) | |
| download | lwn-1439d030b9032261f1111a2dd16b9a8ca11112ef.tar.gz lwn-1439d030b9032261f1111a2dd16b9a8ca11112ef.zip | |
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: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
Diffstat (limited to 'arch/blackfin')
| -rw-r--r-- | 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 9b80b152435e..b882ce22c347 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 |