1 files changed, 17 insertions, 0 deletions

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 182be0f12407..ac1d6b0a6f09 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -4014,6 +4014,23 @@ sub process {
                         }
                 }
 
+# check for unnecessary "Out of Memory" messages
+                if ($line =~ /^\+.*\b$logFunctions\s*\(/ &&
+                    $prevline =~ /^[ \+]\s*if\s*\(\s*(\!\s*|NULL\s*==\s*)?($Lval)(\s*==\s*NULL\s*)?\s*\)/ &&
+                    (defined $1 || defined $3) &&
+                    $linenr > 3) {
+                        my $testval = $2;
+                        my $testline = $lines[$linenr - 3];
+
+                        my ($s, $c) = ctx_statement_block($linenr - 3, $realcnt, 0);
+#                       print("line: <$line>\nprevline: <$prevline>\ns: <$s>\nc: <$c>\n\n\n");
+
+                        if ($c =~ /(?:^|\n)[ \+]\s*(?:$Type\s*)?\Q$testval\E\s*=\s*(?:\([^\)]*\)\s*)?\s*(?:devm_)?(?:[kv][czm]alloc(?:_node|_array)?\b|kstrdup|(?:dev_)?alloc_skb)/) {
+                                WARN("OOM_MESSAGE",
+                                     "Possible unnecessary 'out of memory' message\n" . $hereprev);
+                        }
+                }
+
 # check for bad placement of section $InitAttribute (e.g.: __initdata)
                 if ($line =~ /(\b$InitAttribute\b)/) {
                         my $attr = $1;