fix checkstack.pl arch detection

uname -m was leaving a newline in $arch, and not passing the tests.

Also, printing the unknown arch on failure is probably helpful.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/scripts/checkstack.pl b/scripts/checkstack.pl
index 358f96c75b43..3eca62566d6b 100755
--- a/scripts/checkstack.pl
+++ b/scripts/checkstack.pl
@@ -36,6 +36,7 @@ my (@stack, $re, $dre, $x, $xs);
         my $arch = shift;
         if ($arch eq "") {
                 $arch = `uname -m`;
+                chomp($arch);
         }
 
         $x      = "[0-9a-f]";   # hex character
@@ -91,7 +92,7 @@ my (@stack, $re, $dre, $x, $xs);
                 #   0:   00 e8 38 01     LINK 0x4e0;
                 $re = qr/.*[[:space:]]LINK[[:space:]]*(0x$x{1,8})/o;
         } else {
-                print("wrong or unknown architecture\n");
+                print("wrong or unknown architecture \"$arch\"\n");
                 exit
         }
 }