drm/radeon: Use hweight32

Use hweight32 instead of counting for each bit

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: David Airlie <airlied@linux.ie>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 1 insertions, 7 deletions

diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index cda280d157da..169ecc9628ea 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -1424,13 +1424,7 @@ u32 r6xx_remap_render_backend(struct radeon_device *rdev,
 
 int r600_count_pipe_bits(uint32_t val)
 {
-        int i, ret = 0;
-
-        for (i = 0; i < 32; i++) {
-                ret += val & 1;
-                val >>= 1;
-        }
-        return ret;
+        return hweight32(val);
 }
 
 static void r600_gpu_init(struct radeon_device *rdev)