radeon_dma.c:66:3: error: invalid output constraint '=%c' in asm
                COPY_DWORDS(out, data, count);
                ^
radeon_dma.c:42:12: note: instantiated from:
                              : "=%c" (__tmp), "=D" (dst), "=S" (__tmp) \
                                ^
radeon_dma.c:84:3: error: invalid output constraint '=%c' in asm
                COPY_DWORDS(out, data, count * 2);
                ^
radeon_dma.c:42:12: note: instantiated from:
                              : "=%c" (__tmp), "=D" (dst), "=S" (__tmp) \
                                ^
radeon_dma.c:103:3: error: invalid output constraint '=%c' in asm
                COPY_DWORDS(out, data, count * 3);
                ^
radeon_dma.c:42:12: note: instantiated from:
                              : "=%c" (__tmp), "=D" (dst), "=S" (__tmp) \
                                ^
radeon_dma.c:124:3: error: invalid output constraint '=%c' in asm
                COPY_DWORDS(out, data, count * 4);
                ^
radeon_dma.c:42:12: note: instantiated from:
                              : "=%c" (__tmp), "=D" (dst), "=S" (__tmp) \