scripts/checkstack.pl: Fix 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"

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>

1 files changed, 1 insertions, 1 deletions

diff --git a/scripts/checkstack.pl b/scripts/checkstack.pl
index 122aef5e4e14..371bd17a4983 100755
--- a/scripts/checkstack.pl
+++ b/scripts/checkstack.pl
@@ -46,7 +46,7 @@ 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]!
                 #a110:       d11643ff        sub     sp, sp, #0x590
                 $re = qr/^.*stp.*sp, \#-([0-9]{1,8})\]\!/o;