From 8c709f5c43f3a51871847104fccc507afb6586a4 Mon Sep 17 00:00:00 2001 From: Dave Airlie Date: Tue, 3 Oct 2017 13:49:42 +1000 Subject: [PATCH 2449/4131] amdgpu/dc: use kernel ilog2 for log_2. This should produce the same result. Signed-off-by: Dave Airlie --- 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 -- 2.7.4