linux-kernel - [PATCH 3/3] drm/i915: Temporary conversion to new GENMASK/BIT macros

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Date:   Mon,  8 May 2023 22:14:03 -0700
From:   Lucas De Marchi <lucas.demarchi@...el.com>
To:     intel-gfx@...ts.freedesktop.org, intel-xe@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-kernel@...r.kernel.org,
        Masahiro Yamada <masahiroy@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Kevin Brodsky <kevin.brodsky@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Lucas De Marchi <lucas.demarchi@...el.com>
Subject: [PATCH 3/3] drm/i915: Temporary conversion to new GENMASK/BIT macros

Convert the REG_* macros from i915_reg_defs.h to use the new macros
defined in linux/bits.h. This is just to help on the implementation
of the new macros and not intended to be applied.

Signed-off-by: Lucas De Marchi <lucas.demarchi@...el.com>
---
 drivers/gpu/drm/i915/i915_reg_defs.h | 28 +++++-----------------------
 1 file changed, 5 insertions(+), 23 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_reg_defs.h b/drivers/gpu/drm/i915/i915_reg_defs.h
index 622d603080f9..61fbb8d62b25 100644
--- a/drivers/gpu/drm/i915/i915_reg_defs.h
+++ b/drivers/gpu/drm/i915/i915_reg_defs.h
@@ -17,10 +17,7 @@
  *
  * @return: Value with bit @__n set.
  */
-#define REG_BIT(__n)							\
-	((u32)(BIT(__n) +						\
-	       BUILD_BUG_ON_ZERO(__is_constexpr(__n) &&		\
-				 ((__n) < 0 || (__n) > 31))))
+#define REG_BIT(__n) BIT_U32(__n)
 
 /**
  * REG_BIT8() - Prepare a u8 bit value
@@ -30,10 +27,7 @@
  *
  * @return: Value with bit @__n set.
  */
-#define REG_BIT8(__n)                                                   \
-	((u8)(BIT(__n) +                                                \
-	       BUILD_BUG_ON_ZERO(__is_constexpr(__n) &&         \
-				 ((__n) < 0 || (__n) > 7))))
+#define REG_BIT8(__n) BIT_U8(__n)
 
 /**
  * REG_GENMASK() - Prepare a continuous u32 bitmask
@@ -44,11 +38,7 @@
  *
  * @return: Continuous bitmask from @__high to @__low, inclusive.
  */
-#define REG_GENMASK(__high, __low)					\
-	((u32)(GENMASK(__high, __low) +					\
-	       BUILD_BUG_ON_ZERO(__is_constexpr(__high) &&	\
-				 __is_constexpr(__low) &&		\
-				 ((__low) < 0 || (__high) > 31 || (__low) > (__high)))))
+#define REG_GENMASK(__high, __low) GENMASK_U32(__high, __low)
 
 /**
  * REG_GENMASK64() - Prepare a continuous u64 bitmask
@@ -59,11 +49,7 @@
  *
  * @return: Continuous bitmask from @__high to @__low, inclusive.
  */
-#define REG_GENMASK64(__high, __low)					\
-	((u64)(GENMASK_ULL(__high, __low) +				\
-	       BUILD_BUG_ON_ZERO(__is_constexpr(__high) &&		\
-				 __is_constexpr(__low) &&		\
-				 ((__low) < 0 || (__high) > 63 || (__low) > (__high)))))
+#define REG_GENMASK64(__high, __low) GENMASK_ULL(__high, __low)
 
 /**
  * REG_GENMASK8() - Prepare a continuous u8 bitmask
@@ -74,11 +60,7 @@
  *
  * @return: Continuous bitmask from @__high to @__low, inclusive.
  */
-#define REG_GENMASK8(__high, __low)                                     \
-	((u8)(GENMASK(__high, __low) +                                  \
-	       BUILD_BUG_ON_ZERO(__is_constexpr(__high) &&      \
-				 __is_constexpr(__low) &&               \
-				 ((__low) < 0 || (__high) > 7 || (__low) > (__high)))))
+#define REG_GENMASK8(__high, __low) GENMASK_U8(__high, __low)
 
 /*
  * Local integer constant expression version of is_power_of_2().
-- 
2.40.1