From: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
To: Jarkko Sakkinen <jarkko@kernel.org>
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: Thu, 11 Feb 2021 14:17:12 +0800 [thread overview]
Message-ID: <5b48cbcb-4ef2-9c18-29cc-ef3f30d37180@linux.alibaba.com> (raw)
In-Reply-To: <YBnMeT32niwOW0K2@kernel.org>
On 2/3/21 6:04 AM, Jarkko Sakkinen wrote:
> 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
>
Will do in the next patch.
Thanks,
Tianjia
>> 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
>
prev parent reply other threads:[~2021-02-11 6:18 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
2021-02-11 6:17 ` Tianjia Zhang [this message]
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