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Re: [PATCH 8/9] target/ppc: silence the compiler warnings
From: |
Philippe Mathieu-Daudé |
Subject: |
Re: [PATCH 8/9] target/ppc: silence the compiler warnings |
Date: |
Wed, 28 Oct 2020 10:56:45 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.3.1 |
On 10/28/20 5:18 AM, Chen Qun wrote:
> When using -Wimplicit-fallthrough in our CFLAGS, the compiler showed warning:
> target/ppc/mmu_helper.c: In function ‘dump_mmu’:
> target/ppc/mmu_helper.c:1351:12: warning: this statement may fall through
> [-Wimplicit-fallthrough=]
> 1351 | if (ppc64_v3_radix(env_archcpu(env))) {
> | ^
> target/ppc/mmu_helper.c:1358:5: note: here
> 1358 | default:
> | ^~~~~~~
>
> Add the corresponding "fall through" comment to fix it.
>
> Reported-by: Euler Robot <euler.robot@huawei.com>
> Signed-off-by: Chen Qun <kuhn.chenqun@huawei.com>
> ---
> Cc: David Gibson <david@gibson.dropbear.id.au>
> ---
> target/ppc/mmu_helper.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/target/ppc/mmu_helper.c b/target/ppc/mmu_helper.c
> index 8972714775..51749b62df 100644
> --- a/target/ppc/mmu_helper.c
> +++ b/target/ppc/mmu_helper.c
> @@ -1355,6 +1355,7 @@ void dump_mmu(CPUPPCState *env)
> break;
> }
> #endif
> + /* fall through */
I'm surprise the compiler emit a warning for missing comment,
but don't emit one for superfluous and confusing ones (when
building a ppc32-only target). You'd need to put this before
the #endif.
But instead of this band-aid to silent warning, replace the
TODO by a LOG_UNIMP call, and add a break before the #endif.
> default:
> qemu_log_mask(LOG_UNIMP, "%s: unimplemented\n", __func__);
> }
>
- Re: [PATCH 1/9] target/i386: silence the compiler warnings in gen_shiftd_rm_T1, (continued)
Re: [PATCH 1/9] target/i386: silence the compiler warnings in gen_shiftd_rm_T1, Richard Henderson, 2020/10/28
[PATCH 4/9] linux-user/mips/cpu_loop: silence the compiler warnings, Chen Qun, 2020/10/28
[PATCH 8/9] target/ppc: silence the compiler warnings, Chen Qun, 2020/10/28
[PATCH 9/9] hw/timer/renesas_tmr: silence the compiler warnings, Chen Qun, 2020/10/28
RE: [PATCH 9/9] hw/timer/renesas_tmr: silence the compiler warnings, Chenqun (kuhn), 2020/10/29
[PATCH 3/9] accel/tcg/user-exec: silence the compiler warnings, Chen Qun, 2020/10/28