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From: Jarkko Sakkinen <jarkko@kernel.org>
To: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	"H. Peter Anvin" <hpa@zytor.com>,
	Sean Christopherson <seanjc@google.com>,
	Shuah Khan <shuah@kernel.org>,
	x86@kernel.org, linux-sgx@vger.kernel.org,
	linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org,
	Jia Zhang <zhang.jia@linux.alibaba.com>
Subject: Re: [PATCH v4 5/5] x86/sgx: Remove redundant if conditions in sgx_encl_create
Date: Wed, 3 Feb 2021 00:04:41 +0200	[thread overview]
Message-ID: <YBnMeT32niwOW0K2@kernel.org> (raw)
In-Reply-To: <20210201132653.35690-6-tianjia.zhang@linux.alibaba.com>

On Mon, Feb 01, 2021 at 09:26:53PM +0800, Tianjia Zhang wrote:
> In this scenario, there is no case where va_page is NULL, and
> the error has been checked. The if condition statement here is

if-condition, i.e. dash missing

> redundant, so remove the condition detection.
> 
> Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
> ---
>  arch/x86/kernel/cpu/sgx/ioctl.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/x86/kernel/cpu/sgx/ioctl.c b/arch/x86/kernel/cpu/sgx/ioctl.c
> index 1c6ecf9fbeff..719c21cca569 100644
> --- a/arch/x86/kernel/cpu/sgx/ioctl.c
> +++ b/arch/x86/kernel/cpu/sgx/ioctl.c
> @@ -66,9 +66,10 @@ static int sgx_encl_create(struct sgx_encl *encl, struct sgx_secs *secs)
>  	va_page = sgx_encl_grow(encl);
>  	if (IS_ERR(va_page))
>  		return PTR_ERR(va_page);
> -	else if (va_page)
> -		list_add(&va_page->list, &encl->va_pages);
> -	/* else the tail page of the VA page list had free slots. */
> +	if (!va_page)
> +		return -EIO;
> +
> +	list_add(&va_page->list, &encl->va_pages);
>  
>  	/* The extra page goes to SECS. */
>  	encl_size = secs->size + PAGE_SIZE;
> -- 
> 2.19.1.3.ge56e4f7
> 
> 

Acked-by: Jarkko Sakkinen <jarkko@kernel.org>

/Jarkko

  reply	other threads:[~2021-02-02 22:06 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-01 13:26 [PATCH v4 0/5] Some optimizations related to sgx Tianjia Zhang
2021-02-01 13:26 ` [PATCH v4 1/5] selftests/x86: Use getauxval() to simplify the code in sgx Tianjia Zhang
2021-02-02 22:02   ` Jarkko Sakkinen
2021-02-09  0:09     ` Shuah Khan
2021-02-12 12:20       ` Jarkko Sakkinen
2021-02-01 13:26 ` [PATCH v4 2/5] x86/sgx: Reduce the locking range in sgx_sanitize_section() Tianjia Zhang
2021-02-02 22:00   ` Jarkko Sakkinen
2021-02-11  6:15     ` Tianjia Zhang
2021-02-01 13:26 ` [PATCH v4 3/5] x86/sgx: Optimize the free_cnt count in sgx_epc_section Tianjia Zhang
2021-02-02 21:54   ` Jarkko Sakkinen
2021-02-11  6:05     ` Tianjia Zhang
2021-02-01 13:26 ` [PATCH v4 4/5] x86/sgx: Allows ioctl PROVISION to execute before CREATE Tianjia Zhang
2021-02-02 21:57   ` Jarkko Sakkinen
2021-02-11  6:11     ` Tianjia Zhang
2021-02-01 13:26 ` [PATCH v4 5/5] x86/sgx: Remove redundant if conditions in sgx_encl_create Tianjia Zhang
2021-02-02 22:04   ` Jarkko Sakkinen [this message]
2021-02-11  6:17     ` Tianjia Zhang

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