MIPS: SMP: Allow boot_secondary SMP op to return errors
Allow the boot_secondary SMP op to return an error to __cpu_up(), which
will in turn return it to its caller.
This will allow SMP implementations to return errors quickly in cases
they they know have failed, rather than relying upon __cpu_up()
eventually timing out waiting for the cpu_running completion.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/17014/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/kernel/smp-mt.c b/arch/mips/kernel/smp-mt.c
index 5a7b585..30415a7 100644
--- a/arch/mips/kernel/smp-mt.c
+++ b/arch/mips/kernel/smp-mt.c
@@ -152,7 +152,7 @@ static void vsmp_smp_finish(void)
* (unsigned long)idle->thread_info the gp
* assumes a 1:1 mapping of TC => VPE
*/
-static void vsmp_boot_secondary(int cpu, struct task_struct *idle)
+static int vsmp_boot_secondary(int cpu, struct task_struct *idle)
{
struct thread_info *gp = task_thread_info(idle);
dvpe();
@@ -184,6 +184,8 @@ static void vsmp_boot_secondary(int cpu, struct task_struct *idle)
clear_c0_mvpcontrol(MVPCONTROL_VPC);
evpe(EVPE_ENABLE);
+
+ return 0;
}
/*