checkpatch: warn on uapi #includes that #include <uapi/...

Avoid specifying internal uapi #include paths with uapi/...  as
userspace should not use and never see that.

Neaten message line wrapping above.

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: David Howells <dhowells@redhat.com>
Acked-by: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 5 insertions, 2 deletions

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 1d6e4c541370..4d2c7dfdaabd 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2226,8 +2226,11 @@ sub process {
                         my $path = $1;
                         if ($path =~ m{//}) {
                                 ERROR("MALFORMED_INCLUDE",
-                                      "malformed #include filename\n" .
-                                        $herecurr);
+                                      "malformed #include filename\n" . $herecurr);
+                        }
+                        if ($path =~ "^uapi/" && $realfile =~ m@\binclude/uapi/@) {
+                                ERROR("UAPI_INCLUDE",
+                                      "No #include in ...include/uapi/... should use a uapi/ path prefix\n" . $herecurr);
                         }
                 }