Atish Patra <[email protected]> 於 2018年8月3日 週五 上午2:14寫道：
>
> On 8/2/18 8:23 AM, Zong Li wrote:
> > The boot_sec_cpu is for hutplug CPU on SMP system. It should
> > be conditional compiling. Otherwise, it causes undefined reference
> > to `smp_callin' when compiling uniprocessor kernel.
> >
> > Signed-off-by: Zong Li <[email protected]>
> > ---
> > arch/riscv/kernel/head.S | 2 ++
> > 1 file changed, 2 insertions(+)
> >
> > diff --git a/arch/riscv/kernel/head.S b/arch/riscv/kernel/head.S
> > index 11066d5..9b6f601 100644
> > --- a/arch/riscv/kernel/head.S
> > +++ b/arch/riscv/kernel/head.S
> > @@ -154,6 +154,7 @@ END(_start)
> > .section .text
> > .global boot_sec_cpu
> >
> > +#ifdef CONFIG_HOTPLUG_CPU
> > boot_sec_cpu:
> > /* clear all pending flags */
> > csrw sip, zero
> > @@ -162,6 +163,7 @@ boot_sec_cpu:
> > fence
> >
> > tail smp_callin
> > +#endif
> >
> > __PAGE_ALIGNED_BSS
> > /* Empty zero page */
> >
>
> Thanks for the fix. If you don't mind, I would like to merge it on top
> of my cpu hotplug patch and resubmit together to avoid confusion.
>
OK, just take it:)
