2 files changed, 8 insertions, 3 deletions

diff --git a/editors/patch.c b/editors/patch.c
index 5f7f7d028..f071a0854 100644
--- a/editors/patch.c
+++ b/editors/patch.c
@@ -55,10 +55,12 @@ static char *extract_filename(char *line, int patch_level)
         int i;
 
         /* Terminate string at end of source filename */
-        temp = strchr(filename_start_ptr, '\t');
-        if (temp) *temp = 0;
+        temp = strchrnul(filename_start_ptr, '\t');
+        *temp = '\0';
 
-        /* skip over (patch_level) number of leading directories */
+        /* Skip over (patch_level) number of leading directories */
+        if (patch_level == -1)
+                patch_level = INT_MAX;
         for (i = 0; i < patch_level; i++) {
                 temp = strchr(filename_start_ptr, '/');
                 if (!temp)
diff --git a/scripts/checkstack.pl b/scripts/checkstack.pl
index 41454ceb1..6f455241a 100755
--- a/scripts/checkstack.pl
+++ b/scripts/checkstack.pl
@@ -39,6 +39,9 @@ my (@stack, $re, $x, $xs);
         if ($arch eq 'arm') {
                 #c0008ffc:      e24dd064        sub     sp, sp, #100    ; 0x64
                 $re = qr/.*sub.*sp, sp, #(([0-9]{2}|[3-9])[0-9]{2})/o;
+        } elsif ($arch eq 'blackfin') {
+                #      52:       00 e8 03 00     LINK 0xc;
+                $re = qr/.*LINK (0x$x{1,5});$/o;
         } elsif ($arch =~ /^i[3456]86$/) {
                 #c0105234:       81 ec ac 05 00 00       sub    $0x5ac,%esp
                 $re = qr/^.*[as][du][db]    \$(0x$x{1,8}),\%esp$/o;