From: Zhou Wang <wangzhou1@hisilicon.com>
To: Arnd Bergmann <arnd@kernel.org>
Cc: Jean-Philippe Brucker <jean-philippe@linaro.org>,
kevin.tian@intel.com, Sihang Chen <chensihang1@hisilicon.com>,
Jason Gunthorpe <jgg@ziepe.ca>,
Linux API <linux-api@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Linux-MM <linux-mm@kvack.org>,
"open list:IOMMU DRIVERS" <iommu@lists.linux-foundation.org>,
Alexander Viro <viro@zeniv.linux.org.uk>,
gregkh <gregkh@linuxfoundation.org>,
Zhangfei Gao <zhangfei.gao@linaro.org>,
Andrew Morton <akpm@linux-foundation.org>,
"Liguozhu \(Kenneth\)" <liguozhu@hisilicon.com>,
Linux ARM <linux-arm-kernel@lists.infradead.org>
Subject: Re: [RFC PATCH v3 1/2] mempinfd: Add new syscall to provide memory pin
Date: Tue, 9 Feb 2021 17:27:30 +0800 [thread overview]
Message-ID: <753db746-292c-4f1d-c79f-9a7282a19ba2@hisilicon.com> (raw)
In-Reply-To: <CAK8P3a13aGbqvTxL+5OQxu-wPa6RDHQJkJ_n8O6YeOibbJQ2yg@mail.gmail.com>
On 2021/2/8 5:51, Arnd Bergmann wrote:
> On Sun, Feb 7, 2021 at 9:18 AM Zhou Wang <wangzhou1@hisilicon.com> wrote:
>
>> diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/unistd32.h
>> index cccfbbe..3f49529 100644
>> --- a/arch/arm64/include/asm/unistd32.h
>> +++ b/arch/arm64/include/asm/unistd32.h
>> @@ -891,6 +891,8 @@ __SYSCALL(__NR_faccessat2, sys_faccessat2)
>> __SYSCALL(__NR_process_madvise, sys_process_madvise)
>> #define __NR_epoll_pwait2 441
>> __SYSCALL(__NR_epoll_pwait2, compat_sys_epoll_pwait2)
>> +#define __NR_mempinfd 442
>> +__SYSCALL(__NR_mempinfd, sys_mempinfd)
>
> This adds a compat syscall for 32-bit tasks running on arm64 without adding
> the same for the native arch/arm syscall table. Those two need to always
> stay synchronized. In fact, new system call should ideally get assigned
> on all architectures at the same time, with the same number (or +110
> on arch/alpha).
Thank for pointing out this. I use an ARM64 machine to test, so
currently only add it for ARM64 :)
Best,
Zhou
>
> Arnd
>
> .
>
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next prev parent reply other threads:[~2021-02-09 9:27 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-07 8:18 [RFC PATCH v3 0/2] mempinfd: Add new syscall to provide memory pin Zhou Wang
2021-02-07 8:18 ` [RFC PATCH v3 1/2] " Zhou Wang
2021-02-07 21:34 ` Matthew Wilcox
2021-02-07 22:24 ` Song Bao Hua (Barry Song)
2021-02-08 1:30 ` Matthew Wilcox
2021-02-08 2:27 ` Song Bao Hua (Barry Song)
2021-02-08 8:21 ` David Hildenbrand
2021-02-08 10:13 ` Song Bao Hua (Barry Song)
2021-02-08 10:37 ` David Hildenbrand
2021-02-08 20:52 ` Song Bao Hua (Barry Song)
2021-02-08 2:18 ` David Rientjes via iommu
2021-02-08 5:34 ` Song Bao Hua (Barry Song)
2021-02-07 21:51 ` Arnd Bergmann
2021-02-09 9:27 ` Zhou Wang [this message]
2021-02-07 22:02 ` Andy Lutomirski
2021-02-09 9:17 ` Zhou Wang
2021-02-09 9:37 ` Greg KH
2021-02-09 11:58 ` Zhou Wang
2021-02-09 12:01 ` Greg KH
2021-02-09 12:20 ` Zhou Wang
2021-02-10 18:50 ` Matthew Wilcox
2021-02-08 8:14 ` David Hildenbrand
2021-02-08 18:33 ` Jason Gunthorpe
2021-02-08 20:35 ` Song Bao Hua (Barry Song)
2021-02-08 21:30 ` Jason Gunthorpe
2021-02-09 3:01 ` Song Bao Hua (Barry Song)
2021-02-09 13:53 ` Jason Gunthorpe
2021-02-09 22:22 ` Song Bao Hua (Barry Song)
2021-02-10 18:04 ` Jason Gunthorpe
2021-02-10 21:39 ` Song Bao Hua (Barry Song)
2021-02-11 10:28 ` David Hildenbrand
2021-02-07 8:18 ` [RFC PATCH v3 2/2] selftests/vm: add mempinfd test Zhou Wang
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