linux-kernel - [RFC][PATCH] Makefile: Fix checkstack.pl arm64 wrong or unknown architecture

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Date:   Fri, 31 May 2019 11:26:11 -0400
From:   "George G. Davis" <george_davis@...tor.com>
To:     Andy Whitcroft <apw@...onical.com>, Joe Perches <joe@...ches.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        <linux-arm-kernel@...ts.infradead.org>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Michal Marek <michal.lkml@...kovi.net>,
        <linux-kbuild@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
CC:     "George G. Davis" <george_davis@...tor.com>
Subject: [RFC][PATCH] Makefile: Fix checkstack.pl arm64 wrong or unknown architecture

The following error occurs for the `make ARCH=arm64 checkstack` case:

aarch64-linux-gnu-objdump -d vmlinux $(find . -name '*.ko') | \
perl ./scripts/checkstack.pl arm64
wrong or unknown architecture "arm64"

Fix the above error by setting `CHECKSTACK_ARCH := aarch64` for the
ARCH=arm64 case.

Signed-off-by: George G. Davis <george_davis@...tor.com>
---
 Makefile | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 11358153d8f2..3e615e8553c0 100644
--- a/Makefile
+++ b/Makefile
@@ -1695,7 +1695,11 @@ PHONY += checkstack kernelrelease kernelversion image_name
 ifeq ($(ARCH), um)
 CHECKSTACK_ARCH := $(SUBARCH)
 else
-CHECKSTACK_ARCH := $(ARCH)
+	ifeq ($(ARCH), arm64)
+		CHECKSTACK_ARCH := aarch64
+	else
+		CHECKSTACK_ARCH := $(ARCH)
+	endif
 endif
 checkstack:
 	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
-- 
2.7.4