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From: Dave Airlie <airlied-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
Subject: [PATCH 1/4] amdgpu/dc: use kernel ilog2 for log_2.
Date: Tue,  3 Oct 2017 13:49:42 +1000	[thread overview]
Message-ID: <20171003034945.27909-1-airlied@gmail.com> (raw)

From: Dave Airlie <airlied@redhat.com>

This should produce the same result.

Signed-off-by: Dave Airlie <airlied@redhat.com>
---
 drivers/gpu/drm/amd/display/dc/basics/conversion.c | 10 ----------
 drivers/gpu/drm/amd/display/dc/basics/conversion.h |  5 ++++-
 2 files changed, 4 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/basics/conversion.c b/drivers/gpu/drm/amd/display/dc/basics/conversion.c
index a2e22ae..23c9a0e 100644
--- a/drivers/gpu/drm/amd/display/dc/basics/conversion.c
+++ b/drivers/gpu/drm/amd/display/dc/basics/conversion.c
@@ -102,13 +102,3 @@ void convert_float_matrix(
 		matrix[i] = (uint16_t)reg_value;
 	}
 }
-
-unsigned int log_2(unsigned int num)
-{
-	unsigned int result = 0;
-
-	while ((num >>= 1) != 0)
-		result++;
-
-	return result;
-}
diff --git a/drivers/gpu/drm/amd/display/dc/basics/conversion.h b/drivers/gpu/drm/amd/display/dc/basics/conversion.h
index 189325f..ade785c 100644
--- a/drivers/gpu/drm/amd/display/dc/basics/conversion.h
+++ b/drivers/gpu/drm/amd/display/dc/basics/conversion.h
@@ -38,6 +38,9 @@ void convert_float_matrix(
 	struct fixed31_32 *flt,
 	uint32_t buffer_size);
 
-unsigned int log_2(unsigned int num);
+static inline unsigned int log_2(unsigned int num)
+{
+	return ilog2(num);
+}
 
 #endif
-- 
2.9.5

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             reply	other threads:[~2017-10-03  3:49 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-10-03  3:49 Dave Airlie [this message]
     [not found] ` <20171003034945.27909-1-airlied-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-10-03  3:49   ` [PATCH 2/4] amdgpu/dc: drop dce110_types.h Dave Airlie
2017-10-03  3:49   ` [PATCH 3/4] amdgpu/dc: drop hw_sequencer_types.h Dave Airlie
2017-10-03  3:49   ` [PATCH 4/4] amdgpu/dc: remove bitmap implementation in gpio_service Dave Airlie
     [not found]     ` <20171003034945.27909-4-airlied-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-10-03 16:10       ` Harry Wentland
2017-10-03 19:29       ` Felix Kuehling

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