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authorSonic Zhang <sonic.zhang@analog.com>2012-11-01 17:07:09 +0800
committerBob Liu <lliubbo@gmail.com>2012-12-13 15:28:40 +0800
commit1439d030b9032261f1111a2dd16b9a8ca11112ef (patch)
treec63035724cef845a0c8b8b17904dd142dbdd0984 /arch/blackfin
parentf1a1d52508bd29c68a7f77412c0a9cf5e1b51154 (diff)
downloadvexpress-lsk-1439d030b9032261f1111a2dd16b9a8ca11112ef.tar.gz
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.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/arch/blackfin/kernel/kgdb.c b/arch/blackfin/kernel/kgdb.c
index 9b80b152435..b882ce22c34 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