linux-kernel - Re: [PATCH] selftests: kvm: replace ternary operator with min()

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Date:   Thu, 12 May 2022 16:04:20 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Guo Zhengkui <guozhengkui@...o.com>, Marc Zyngier <maz@...nel.org>,
        James Morse <james.morse@....com>,
        Alexandru Elisei <alexandru.elisei@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Shuah Khan <shuah@...nel.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Christian Borntraeger <borntraeger@...ux.ibm.com>,
        Janosch Frank <frankja@...ux.ibm.com>,
        Claudio Imbrenda <imbrenda@...ux.ibm.com>,
        David Hildenbrand <david@...hat.com>,
        Anup Patel <anup@...infault.org>,
        "moderated list:KERNEL VIRTUAL MACHINE FOR ARM64 (KVM/arm64)" 
        <linux-arm-kernel@...ts.infradead.org>,
        "moderated list:KERNEL VIRTUAL MACHINE FOR ARM64 (KVM/arm64)" 
        <kvmarm@...ts.cs.columbia.edu>,
        "open list:KERNEL VIRTUAL MACHINE (KVM)" <kvm@...r.kernel.org>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        "open list:RISC-V ARCHITECTURE" <linux-riscv@...ts.infradead.org>
Cc:     zhengkui_guo@...look.com
Subject: Re: [PATCH] selftests: kvm: replace ternary operator with min()

On 5/11/22 14:05, Guo Zhengkui wrote:
> Fix the following coccicheck warnings:
> 
> tools/testing/selftests/kvm/lib/s390x/ucall.c:25:15-17: WARNING
> opportunity for min()
> tools/testing/selftests/kvm/lib/x86_64/ucall.c:27:15-17: WARNING
> opportunity for min()
> tools/testing/selftests/kvm/lib/riscv/ucall.c:56:15-17: WARNING
> opportunity for min()
> tools/testing/selftests/kvm/lib/aarch64/ucall.c:82:15-17: WARNING
> opportunity for min()
> tools/testing/selftests/kvm/lib/aarch64/ucall.c:55:20-21: WARNING
> opportunity for min()
> 
> min() is defined in tools/include/linux/kernel.h.
> 
> Signed-off-by: Guo Zhengkui <guozhengkui@...o.com>
> ---
>   tools/testing/selftests/kvm/lib/aarch64/ucall.c | 4 ++--
>   tools/testing/selftests/kvm/lib/riscv/ucall.c   | 2 +-
>   tools/testing/selftests/kvm/lib/s390x/ucall.c   | 2 +-
>   tools/testing/selftests/kvm/lib/x86_64/ucall.c  | 2 +-
>   4 files changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/tools/testing/selftests/kvm/lib/aarch64/ucall.c b/tools/testing/selftests/kvm/lib/aarch64/ucall.c
> index e0b0164e9af8..00be3ef195ca 100644
> --- a/tools/testing/selftests/kvm/lib/aarch64/ucall.c
> +++ b/tools/testing/selftests/kvm/lib/aarch64/ucall.c
> @@ -52,7 +52,7 @@ void ucall_init(struct kvm_vm *vm, void *arg)
>   	 * lower and won't match physical addresses.
>   	 */
>   	bits = vm->va_bits - 1;
> -	bits = vm->pa_bits < bits ? vm->pa_bits : bits;
> +	bits = min(vm->pa_bits, bits);
>   	end = 1ul << bits;
>   	start = end * 5 / 8;
>   	step = end / 16;
> @@ -79,7 +79,7 @@ void ucall(uint64_t cmd, int nargs, ...)
>   	va_list va;
>   	int i;
>   
> -	nargs = nargs <= UCALL_MAX_ARGS ? nargs : UCALL_MAX_ARGS;
> +	nargs = min(nargs, UCALL_MAX_ARGS);
>   
>   	va_start(va, nargs);
>   	for (i = 0; i < nargs; ++i)
> diff --git a/tools/testing/selftests/kvm/lib/riscv/ucall.c b/tools/testing/selftests/kvm/lib/riscv/ucall.c
> index 9e42d8248fa6..34f16fe70ce8 100644
> --- a/tools/testing/selftests/kvm/lib/riscv/ucall.c
> +++ b/tools/testing/selftests/kvm/lib/riscv/ucall.c
> @@ -53,7 +53,7 @@ void ucall(uint64_t cmd, int nargs, ...)
>   	va_list va;
>   	int i;
>   
> -	nargs = nargs <= UCALL_MAX_ARGS ? nargs : UCALL_MAX_ARGS;
> +	nargs = min(nargs, UCALL_MAX_ARGS);
>   
>   	va_start(va, nargs);
>   	for (i = 0; i < nargs; ++i)
> diff --git a/tools/testing/selftests/kvm/lib/s390x/ucall.c b/tools/testing/selftests/kvm/lib/s390x/ucall.c
> index 9d3b0f15249a..665267c1135d 100644
> --- a/tools/testing/selftests/kvm/lib/s390x/ucall.c
> +++ b/tools/testing/selftests/kvm/lib/s390x/ucall.c
> @@ -22,7 +22,7 @@ void ucall(uint64_t cmd, int nargs, ...)
>   	va_list va;
>   	int i;
>   
> -	nargs = nargs <= UCALL_MAX_ARGS ? nargs : UCALL_MAX_ARGS;
> +	nargs = min(nargs, UCALL_MAX_ARGS);
>   
>   	va_start(va, nargs);
>   	for (i = 0; i < nargs; ++i)
> diff --git a/tools/testing/selftests/kvm/lib/x86_64/ucall.c b/tools/testing/selftests/kvm/lib/x86_64/ucall.c
> index a3489973e290..2ea31a0ebe30 100644
> --- a/tools/testing/selftests/kvm/lib/x86_64/ucall.c
> +++ b/tools/testing/selftests/kvm/lib/x86_64/ucall.c
> @@ -24,7 +24,7 @@ void ucall(uint64_t cmd, int nargs, ...)
>   	va_list va;
>   	int i;
>   
> -	nargs = nargs <= UCALL_MAX_ARGS ? nargs : UCALL_MAX_ARGS;
> +	nargs = min(nargs, UCALL_MAX_ARGS);
>   
>   	va_start(va, nargs);
>   	for (i = 0; i < nargs; ++i)

Queued, thanks.

Paolo