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 e2c719b75c8c186deb86570d8466df9e9eff919b
Author: Rob Clark <robdclark@xxxxxxxxx>
Date: Mon Dec 15 13:56:32 2014 -0500
drm/i915: tame the chattermouth (v2)
Reported-by: Jim Davis <jim.epost@xxxxxxxxx>
Reference: http://mid.gmane.org/CA+r1ZhgHTi7bS2irhtuSUs9aO=Br1dumN8=oAOeaMJDZ_ZhwBw@xxxxxxxxxxxxxx
Cc: Rob Clark <robdclark@xxxxxxxxx>
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_drv.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index e008fa0c58da..66f0c607dbef 100644
--- 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"); \
} \
--
2.1.4
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