The variable i is already declared as uint32_t in the same function. This fixes the following error, when compiling this code on older kernel: drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn32/dcn32_fpu.c: In function 'dcn32_full_validate_bw_helper': drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn32/dcn32_fpu.c:1018:3: error: 'for' loop initial declarations are only allowed in C99 or C11 mode for (int i = 0; i < dc->res_pool->pipe_count; i++) { ^~~ drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn32/dcn32_fpu.c:1018:3: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn32/dcn32_fpu.c:982:11: error: unused variable 'i' [-Werror=unused-variable] uint32_t i = 0; Fixes: f5b9c1ffabce ("drm/amd/display: Re-initialize viewport after pipe merge") Signed-off-by: Jocelyn Falempe <jfalempe@xxxxxxxxxx> --- drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c b/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c index 8e4c9d0887ce..56f02b1ea808 100644 --- a/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c +++ b/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c @@ -1015,7 +1015,7 @@ static void dcn32_full_validate_bw_helper(struct dc *dc, dcn32_merge_pipes_for_subvp(dc, context); // to re-initialize viewport after the pipe merge - for (int i = 0; i < dc->res_pool->pipe_count; i++) { + for (i = 0; i < dc->res_pool->pipe_count; i++) { struct pipe_ctx *pipe_ctx = &context->res_ctx.pipe_ctx[i]; if (!pipe_ctx->plane_state || !pipe_ctx->stream) -- 2.37.3