linux-kernel - Re: [PATCH -next v2 0/2]riscv: some refactorings realted to uaccess and extable

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Message-ID: <207ef9da-34d3-b059-9bfd-871a0c6ddab2@microchip.com>
Date:   Wed, 24 Aug 2022 16:49:12 +0000
From:   <Conor.Dooley@...rochip.com>
To:     <tongtiangen@...wei.com>, <paul.walmsley@...ive.com>,
        <palmer@...belt.com>, <palmer@...osinc.com>,
        <aou@...s.berkeley.edu>, <Conor.Dooley@...rochip.com>
CC:     <linux-riscv@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        <wangkefeng.wang@...wei.com>, <guohanjun@...wei.com>
Subject: Re: [PATCH -next v2 0/2]riscv: some refactorings realted to uaccess
 and extable

On 24/08/2022 07:31, Tong Tiangen wrote:
> Hi riscv maintainers, kindly ping...
> 
> Thanks,
> Tong.
> 
> 在 2022/8/15 11:20, Tong Tiangen 写道:

It's barely been more than a week, relax :)

checkpatch really does not like one of the macros you added. Please
consider whether this is valid:

ERROR: Macros with complex values should be enclosed in parentheses
#38: FILE: arch/riscv/include/asm/asm-extable.h:61:
+#define _ASM_EXTABLE_KACCESS_ERR_ZERO(insn, fixup, err, zero)          \
+       __DEFINE_ASM_GPR_NUMS                                           \
+       __ASM_EXTABLE_RAW(#insn, #fixup,                                \
+                         __stringify(EX_TYPE_KACCESS_ERR_ZERO),        \
+                         "("                                           \
+                           EX_DATA_REG(ERR, err) " | "                 \
+                           EX_DATA_REG(ZERO, zero)                     \
+                         ")")

Thanks,
Conor.

>> This patchset do some refactorings related to riscv's uaccess and extable,
>> mainly for the usage of __get/put_user_nocheck() which not distinguish user
>> access and kernel access.
>>
>> v1 -> v2:
>>    According to Conor's suggestion, split into two logically independent
>>    patches.
>>
>> Tong Tiangen (2):
>>    riscv: uaccess: rename __get/put_user_nocheck to __get/put_mem_nocheck
>>    riscv: extable: add new extable type EX_TYPE_KACCESS_ERR_ZERO support
>>
>>   arch/riscv/include/asm/asm-extable.h |  12 ++
>>   arch/riscv/include/asm/uaccess.h     | 162 +++++++++++++--------------
>>   arch/riscv/mm/extable.c              |   1 +
>>   3 files changed, 94 insertions(+), 81 deletions(-)
>>