Create basic char device

1 files changed, 22 insertions, 0 deletions

diff --git a/util.h b/util.h
new file mode 100644
index 0000000..bd9bcc3
--- /dev/null
+++ b/util.h
@@ -0,0 +1,22 @@
+#ifndef UTIL_H
+#define UTIL_H
+
+#define ORFAIL(cond, label) \
+({ \
+	err = (cond); \
+	if (err < 0) { \
+		goto label; \
+	} \
+})
+
+#define ORFAIL_PTR(cond, lvalue, label) \
+({ \
+	lvalue = (cond); \
+	if (IS_ERR(lvalue)) { \
+		err = PTR_ERR(lvalue); \
+		goto label; \
+	} \
+})
+	
+
+#endif