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.
Regards,
Atish
