[Intel-gfx] [PATCH v2 1/2] drm/i915: Introduce INTEL_GEN_MASK

[Joonas Lahtinen]

Split INTEL_GEN_MASK out of IS_GEN macro, and make it usable
within static declarations (unlike combound statements).

Cc: Jani Nikula <jani.nikula at intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Signed-off-by: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
Reviewed-by: Jani Nikula <jani.nikula at intel.com>
Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_drv.h | 22 ++++++++++------------
 1 file changed, 10 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 63ca2ffcafef..c3f9d7d7b146 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2873,23 +2873,21 @@ intel_info(const struct drm_i915_private *dev_priv)
 #define INTEL_REVID(dev_priv)	((dev_priv)->drm.pdev->revision)
 
 #define GEN_FOREVER (0)
+
+#define INTEL_GEN_MASK(s, e) ( \
+        BUILD_BUG_ON_ZERO(!__builtin_constant_p(s)) + \
+        BUILD_BUG_ON_ZERO(!__builtin_constant_p(e)) + \
+        GENMASK((e) != GEN_FOREVER ? (e) - 1 : BITS_PER_LONG - 1, \
+	        (s) != GEN_FOREVER ? (s) - 1 : 0) \
+)
+
 /*
  * Returns true if Gen is in inclusive range [Start, End].
  *
  * Use GEN_FOREVER for unbound start and or end.
  */
-#define IS_GEN(dev_priv, s, e) ({ \
-	unsigned int __s = (s), __e = (e); \
-	BUILD_BUG_ON(!__builtin_constant_p(s)); \
-	BUILD_BUG_ON(!__builtin_constant_p(e)); \
-	if ((__s) != GEN_FOREVER) \
-		__s = (s) - 1; \
-	if ((__e) == GEN_FOREVER) \
-		__e = BITS_PER_LONG - 1; \
-	else \
-		__e = (e) - 1; \
-	!!((dev_priv)->info.gen_mask & GENMASK((__e), (__s))); \
-})
+#define IS_GEN(dev_priv, s, e) \
+	(!!((dev_priv)->info.gen_mask & INTEL_GEN_MASK((s), (e))))
 
 /*
  * Return true if revision is in range [since,until] inclusive.
-- 
2.13.5