From: Ville Syrjälä <ville.syrj...@linux.intel.com>
__iowmb() isn't available on most architectures. Make
its use optional so that the driver can be built on
other architectures with COMPILE_TEST=y.
v2: Add a comment stating this is for COMPILE_TEST (Tomi)
Cc: Tomi Valkeinen <tomi.valkei...@ideasonboard.com>
Acked-by: Jyri Sarha <jyri.sa...@iki.fi>
Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
---
drivers/gpu/drm/tilcdc/tilcdc_regs.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_regs.h
b/drivers/gpu/drm/tilcdc/tilcdc_regs.h
index f90e2dc3457c..332b24327386 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_regs.h
+++ b/drivers/gpu/drm/tilcdc/tilcdc_regs.h
@@ -125,7 +125,10 @@ static inline void tilcdc_write64(struct drm_device *dev,
u32 reg, u64 data)
#if defined(iowrite64) && !defined(iowrite64_is_nonatomic)
iowrite64(data, addr);
#else
+ /* allow compilation without __iowmb() for COMPILE_TEST */
+#ifdef __iowmb
__iowmb();
+#endif
/* This compiles to strd (=64-bit write) on ARM7 */
*(volatile u64 __force *)addr = __cpu_to_le64(data);
#endif
--
2.45.2
