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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org,
        Masahiro Yamada <yamada.masahiro@socionext.com>,
        "George G. Davis" <george_davis@mentor.com>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.9 021/102] scripts/checkstack.pl: Fix arm64 wrong or unknown architecture
Date:   Mon,  8 Jul 2019 17:12:14 +0200
Message-Id: <20190708150527.302732202@linuxfoundation.org>
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[ Upstream commit 4f45d62a52297b10ded963412a158685647ecdec ]

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"

As suggested by Masahiro Yamada, fix the above error using regular
expressions in the same way it was fixed for the `ARCH=x86` case via
commit fda9f9903be6 ("scripts/checkstack.pl: automatically handle
32-bit and 64-bit mode for ARCH=x86").

Suggested-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: George G. Davis <george_davis@mentor.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 scripts/checkstack.pl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/checkstack.pl b/scripts/checkstack.pl
index 12a6940741fe..b8f616545277 100755
--- a/scripts/checkstack.pl
+++ b/scripts/checkstack.pl
@@ -45,7 +45,7 @@ my (@stack, $re, $dre, $x, $xs, $funcre);
 	$x	= "[0-9a-f]";	# hex character
 	$xs	= "[0-9a-f ]";	# hex character or space
 	$funcre = qr/^$x* <(.*)>:$/;
-	if ($arch eq 'aarch64') {
+	if ($arch =~ '^(aarch|arm)64$') {
 		#ffffffc0006325cc:       a9bb7bfd        stp     x29, x30, [sp, #-80]!
 		$re = qr/^.*stp.*sp, \#-([0-9]{1,8})\]\!/o;
 	} elsif ($arch eq 'arm') {
-- 
2.20.1