scripts/checkstack.pl: Fix arm64 wrong or unknown architecture

[ 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>

diff --git a/scripts/checkstack.pl b/scripts/checkstack.pl
index 12a6940..b8f6165 100755 (executable)
--- 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') {