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Date:   Mon, 3 Jun 2019 10:30:39 -0400
From:   "George G. Davis" <george_davis@...tor.com>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>,
        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>,
        Michal Marek <michal.lkml@...kovi.net>,
        <linux-kbuild@...r.kernel.org>, Qian Cai <cai@....pw>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "George G. Davis" <george_davis@...tor.com>,
        Breno Leitao <leitao@...ian.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        open list <linux-kernel@...r.kernel.org>
Subject: [PATCH v2] 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@...ionext.com>
Signed-off-by: George G. Davis <george_davis@...tor.com>
---
v1:
- https://patchwork.kernel.org/patch/10970393/
v2:
- Updates as Suggested-by: Masahiro Yamada
- Update commit subject due to moving the fix from Makefile to
  checkstack.pl
---
 scripts/checkstack.pl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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;
-- 
2.7.4

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