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Blackfin arch: fix bug - kgdb fails to continue after setting breakpoint on bf561-ezkit kernel with smp patch 

Free spinlock before call IPI handlers.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>


Header from folded patch 'blackfin_arch__fix_bug_-_kgdb_fails_to_continue_after_setting_breakpoint_on_bf561-ezkit_kernel_with_smp_patch-1':

Blackfin arch: fix bug - kgdb fails to continue after setting breakpoint on bf561-ezkit kernel with smp patch

Don't test l1 code in SMP kernel.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
This commit is contained in:
Sonic Zhang 2009-03-05 16:44:53 +08:00 committed by Bryan Wu
parent 8bf6774d7f
commit 0bf3d93308
2 changed files with 12 additions and 3 deletions
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9
arch/blackfin/kernel/kgdb_test.c
View File

@ -20,6 +20,7 @@
static char cmdline[256];
static unsigned long len;
#ifndef CONFIG_SMP
static int num1 __attribute__((l1_data));
void kgdb_l1_test(void) __attribute__((l1_text));
@ -32,6 +33,8 @@ void kgdb_l1_test(void)
printk(KERN_ALERT "L1(after change) : data variable addr = 0x%p, data value is %d\n", &num1, num1);
return ;
}
#endif
#if L2_LENGTH
static int num2 __attribute__((l2));
@ -59,10 +62,12 @@ int kgdb_test(char *name, int len, int count, int z)
static int test_proc_output(char *buf)
{
kgdb_test("hello world!", 12, 0x55, 0x10);
#ifndef CONFIG_SMP
kgdb_l1_test();
#if L2_LENGTH
#endif
#if L2_LENGTH
kgdb_l2_test();
#endif
#endif
return 0;
}

6
arch/blackfin/mach-common/smp.c
View File

@ -158,10 +158,14 @@ static irqreturn_t ipi_handler(int irq, void *dev_instance)
kfree(msg);
break;
case BFIN_IPI_CALL_FUNC:
spin_unlock(&msg_queue->lock);
ipi_call_function(cpu, msg);
spin_lock(&msg_queue->lock);
break;
case BFIN_IPI_CPU_STOP:
spin_unlock(&msg_queue->lock);
ipi_cpu_stop(cpu);
spin_lock(&msg_queue->lock);
kfree(msg);
break;
default:
@ -457,7 +461,7 @@ void smp_icache_flush_range_others(unsigned long start, unsigned long end)
smp_flush_data.start = start;
smp_flush_data.end = end;
if (smp_call_function(&ipi_flush_icache, &smp_flush_data, 1))
if (smp_call_function(&ipi_flush_icache, &smp_flush_data, 0))
printk(KERN_WARNING "SMP: failed to run I-cache flush request on other CPUs\n");
}
EXPORT_SYMBOL_GPL(smp_icache_flush_range_others);