[PATCH] scripts/checkpatch: emit a warning if an imported file is touched

[Stefano Garzarella]

If a file imported from Linux is touched, emit a warning and suggest
using scripts/update-linux-headers.sh

Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
---
 scripts/checkpatch.pl | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index ff373a7083..b0e8266fa2 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -1374,6 +1374,7 @@ sub process {
        my $in_header_lines = $file ? 0 : 1;
        my $in_commit_log = 0;          #Scanning lines before patch
        my $reported_maintainer_file = 0;
+       my $reported_imported_file = 0;
        my $non_utf8_charset = 0;
 
        our @report = ();
@@ -1673,8 +1674,17 @@ sub process {
 # ignore non-hunk lines and lines being removed
                next if (!$hunk_line || $line =~ /^-/);
 
-# ignore files that are being periodically imported from Linux
-               next if ($realfile =~ 
/^(linux-headers|include\/standard-headers)\//);
+# ignore files that are being periodically imported from Linux and emit a 
warning
+               if ($realfile =~ 
/^(linux-headers|include\/standard-headers)\//) {
+                       if (!$reported_imported_file) {
+                               $reported_imported_file = 1;
+                               WARN("added, moved or deleted file(s) " .
+                                    "imported from Linux, are you using " .
+                                    "scripts/update-linux-headers.sh?\n" .
+                                    $herecurr);
+                       }
+                       next;
+               }
 
 #trailing whitespace
                if ($line =~ /^\+.*\015/) {
-- 
2.45.2