Building system: Improve compatibility for delayed work

From: Mauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/v4l/scripts/make_config_compat.pl b/v4l/scripts/make_config_compat.pl
index 7c7841459..1f5b8bae6 100755
--- a/v4l/scripts/make_config_compat.pl
+++ b/v4l/scripts/make_config_compat.pl
@@ -338,6 +338,26 @@ sub check_bitops()
 	$out.= "\n#define NEED_BITOPS 1\n";
 }
 
+sub check_delayed_work()
+{
+	my @files = ( "$kdir//include/linux/workqueue.h" );
+
+	foreach my $file ( @files ) {
+		open IN, "<$file" or die "File not found: $file";
+		while (<IN>) {
+			if (m/struct\s+delayed_work/) {
+				close IN;
+				# definition found. No need for compat
+				return;
+			}
+		}
+		close IN;
+	}
+
+	# definition not found. This means that we need compat
+	$out.= "\n#define NEED_DELAYED_WORK 1\n";
+}
+
 sub check_other_dependencies()
 {
 	check_spin_lock();
@@ -357,6 +377,7 @@ sub check_other_dependencies()
 	check_poll_schedule();
 	check_snd_BUG_ON();
 	check_bitops();
+	check_delayed_work();
 }
 
 # Do the basic rules