graphic: 0.585 device: 0.440 performance: 0.437 network: 0.355 architecture: 0.346 semantic: 0.323 mistranslation: 0.319 ppc: 0.308 vnc: 0.305 socket: 0.246 x86: 0.202 kernel: 0.176 hypervisor: 0.161 risc-v: 0.157 i386: 0.147 PID: 0.140 KVM: 0.139 arm: 0.134 peripherals: 0.132 user-level: 0.126 debug: 0.124 VMM: 0.119 register: 0.109 TCG: 0.106 virtual: 0.093 boot: 0.087 files: 0.086 assembly: 0.047 permissions: 0.041 qemu/hw/char/exynos4210_uart.c: possible pointless local variable ? $ fgrep frame_size qemu/hw/char/exynos4210_uart.c int speed, parity, data_bits, stop_bits, frame_size; frame_size = 1; /* start bit */ frame_size++; /* parity bit */ frame_size += data_bits + stop_bits; $ Suggest either use it or delete it. Thanks for the report -- patch sent to mailing list which deletes the variable. Now fixed in git master, commit e62694a078f182.