drm/i915: Move WARN_ON/MISSING_CASE macros to i915_utils.h

We can't sometimes use these macros in other headers due to
include and definition order. As i915_utils.h already contains
other helper macros move these macros there.

v2: checkpatch cleanup for WARN() macro.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170328084513.174200-1-michal.wajdeczko@intel.com
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

drivers/gpu/drm/i915/i915_drv.h

@@ -82,24 +82,6 @@
 #define DRIVER_DATE		"20170320"
 #define DRIVER_TIMESTAMP	1489994464
 
-#undef WARN_ON
-/* Many gcc seem to no see through this and fall over :( */
-#if 0
-#define WARN_ON(x) ({ \
-	bool __i915_warn_cond = (x); \
-	if (__builtin_constant_p(__i915_warn_cond)) \
-		BUILD_BUG_ON(__i915_warn_cond); \
-	WARN(__i915_warn_cond, "WARN_ON(" #x ")"); })
-#else
-#define WARN_ON(x) WARN((x), "%s", "WARN_ON(" __stringify(x) ")")
-#endif
-
-#undef WARN_ON_ONCE
-#define WARN_ON_ONCE(x) WARN_ONCE((x), "%s", "WARN_ON_ONCE(" __stringify(x) ")")
-
-#define MISSING_CASE(x) WARN(1, "Missing switch case (%lu) in %s\n", \
-			     (long) (x), __func__);
-
 /* Use I915_STATE_WARN(x) and I915_STATE_WARN_ON() (rather than WARN() and
  * WARN_ON()) for hw state sanity checks to check for unexpected conditions
  * which may not necessarily be a user visible problem.  This will either

drivers/gpu/drm/i915/i915_utils.h

@@ -25,6 +25,24 @@
 #ifndef __I915_UTILS_H
 #define __I915_UTILS_H
 
+#undef WARN_ON
+/* Many gcc seem to no see through this and fall over :( */
+#if 0
+#define WARN_ON(x) ({ \
+	bool __i915_warn_cond = (x); \
+	if (__builtin_constant_p(__i915_warn_cond)) \
+		BUILD_BUG_ON(__i915_warn_cond); \
+	WARN(__i915_warn_cond, "WARN_ON(" #x ")"); })
+#else
+#define WARN_ON(x) WARN((x), "%s", "WARN_ON(" __stringify(x) ")")
+#endif
+
+#undef WARN_ON_ONCE
+#define WARN_ON_ONCE(x) WARN_ONCE((x), "%s", "WARN_ON_ONCE(" __stringify(x) ")")
+
+#define MISSING_CASE(x) WARN(1, "Missing switch case (%lu) in %s\n", \
+			     (long)(x), __func__)
+
 #if GCC_VERSION >= 70000
 #define add_overflows(A, B) \
 	__builtin_add_overflow_p((A), (B), (typeof((A) + (B)))0)

drivers/gpu/drm/i915/intel_pm.c

@@ -8088,7 +8088,7 @@ static inline int gen6_check_mailbox_status(struct drm_i915_private *dev_priv)
 	case GEN6_PCODE_TIMEOUT:
 		return -ETIMEDOUT;
 	default:
-		MISSING_CASE(flags)
+		MISSING_CASE(flags);
 		return 0;
 	}
 }