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MIPS: SMP: Allow boot_secondary SMP op to return errors

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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>
This commit is contained in:
Paul Burton
2017-08-12 19:49:40 -07:00
committed by Ralf Baechle
parent 68923cdc2e
commit d595d423d0
14 changed files with 37 additions and 15 deletions
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3
arch/mips/kernel/smp-cmp.c
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@@ -78,7 +78,7 @@ static void cmp_smp_finish(void)
* __KSTK_TOS(idle) is apparently the stack pointer
* (unsigned long)idle->thread_info the gp
*/
static void cmp_boot_secondary(int cpu, struct task_struct *idle)
static int cmp_boot_secondary(int cpu, struct task_struct *idle)
{
struct thread_info *gp = task_thread_info(idle);
unsigned long sp = __KSTK_TOS(idle);
@@ -95,6 +95,7 @@ static void cmp_boot_secondary(int cpu, struct task_struct *idle)
#endif
amon_cpu_start(cpu, pc, sp, (unsigned long)gp, a0);
return 0;
}
/*