drm/i915: fix build for CONFIG_BUG=n

jnikula · danvet · commit 2f3408c7ef47 · 2015-01-12T23:43:09.000+01:00
If CONFIG_BUG=n __WARN_printf won't be defined leading to the below build failure. The double underscores should have told us to steer clear of it anyway. drivers/gpu/drm/i915/intel_display.c: In function ‘assert_pll’: drivers/gpu/drm/i915/intel_display.c:1027:2: error: implicit declaration of function ‘__WARN_printf’ [-Werror=implicit-function-declaration] I915_STATE_WARN(cur_state != state, Use WARN(1, ...) instead. It handles CONFIG_BUG=n gracefully and, with the constant condition, a sane compiler should reduce it to __WARN_printf. This is a regression introduced by commit e2c719b Author: Rob Clark <robdclark@gmail.com> Date: Mon Dec 15 13:56:32 2014 -0500 drm/i915: tame the chattermouth (v2) Reported-by: Jim Davis <jim.epost@gmail.com> Reference: http://mid.gmane.org/CA+r1ZhgHTi7bS2irhtuSUs9aO=Br1dumN8=oAOeaMJDZ_ZhwBw@mail.gmail.com Cc: Rob Clark <robdclark@gmail.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
@@ -83,7 +83,7 @@
 	int __ret_warn_on = !!(condition);				\
 	if (unlikely(__ret_warn_on)) {					\
 		if (i915.verbose_state_checks)				\
-			__WARN_printf(format);				\
+			WARN(1, format);				\
 		else 							\
 			DRM_ERROR(format);				\
 	}								\
@@ -94,7 +94,7 @@
 	int __ret_warn_on = !!(condition);				\
 	if (unlikely(__ret_warn_on)) {					\
 		if (i915.verbose_state_checks)				\
-			__WARN_printf("WARN_ON(" #condition ")\n");	\
+			WARN(1, "WARN_ON(" #condition ")\n");		\
 		else 							\
 			DRM_ERROR("WARN_ON(" #condition ")\n");		\
 	}								\
