Hi Geert-san,
> From: Geert Uytterhoeven, Sent: Wednesday, December 26, 2018 8:06 PM
>
> I have pushed renesas-drivers-2018-12-26-v4.20 to
> https://git.kernel.org/cgit/linux/kernel/git/geert/renesas-drivers.git
>
> This tree is meant to ease development of platform support and drivers
> for Renesas ARM SoCs. It is created by merging (a) the for-next branches
> of various subsystem trees and (b) branches with driver code submitted
> or planned for submission to maintainers into the development branch of
> Simon Horman's renesas.git tree.
>
> Today's version is based on renesas-devel-20181220-v4.20-rc7.
I built this version with "gcc version 5.2.1 20151005 (Linaro GCC
5.2-2015.11-1)",
and then the following build error happened:
AS arch/arm64/kernel/head.o
/home/shimoda/development/renesas/renesas-drivers/arch/arm64/kernel/head.S:
Assembler messages:
/home/shimoda/development/renesas/renesas-drivers/arch/arm64/kernel/head.S:824:
Error: missing ')'
/home/shimoda/development/renesas/renesas-drivers/arch/arm64/kernel/head.S:824:
Error: missing ')'
/home/shimoda/development/renesas/renesas-drivers/arch/arm64/kernel/head.S:824:
Error: missing ')'
/home/shimoda/development/renesas/renesas-drivers/arch/arm64/kernel/head.S:824:
Error: unexpected characters following instruction at operand 2 -- `mov
x2,#(2)|(2U<<(8))'
This error seems to cause the commit 66f16a24512f ("arm64: smp: Rework early
feature mismatched detection").
And if I modified the code as following, the build error disappeared:
---
diff --git a/arch/arm64/include/asm/smp.h b/arch/arm64/include/asm/smp.h
index 18955618..e9b9cee 100644
--- a/arch/arm64/include/asm/smp.h
+++ b/arch/arm64/include/asm/smp.h
@@ -30,7 +30,7 @@
#define CPU_PANIC_KERNEL (3)
#define CPU_STUCK_REASON_52_BIT_VA (1U << CPU_STUCK_REASON_SHIFT)
-#define CPU_STUCK_REASON_NO_GRAN (2U << CPU_STUCK_REASON_SHIFT)
+#define CPU_STUCK_REASON_NO_GRAN (UL(2) << CPU_STUCK_REASON_SHIFT)
#ifndef __ASSEMBLY__
---
So, I think we have to fix this, but what do you think?
# I don't know why the line 812 doesn't cause the build error,
# but the line 824 causes the build error though...
Best regards,
Yoshihiro Shimoda
