LKML Archive on
 help / color / Atom feed
From: Palmer Dabbelt <>
Subject: Re: [PATCH] RISC-V: Don't use a global include guard for uapi/asm/syscalls.h
Date: Thu, 09 Aug 2018 13:58:47 -0700 (PDT)
Message-ID: <mhng-0e048cc1-42e3-4552-88c5-00177db30a5c@palmer-si-x1c4> (raw)
In-Reply-To: <>

On Thu, 09 Aug 2018 06:26:12 PDT (-0700), wrote:
> On Fri, Aug 03, 2018 at 12:53:44PM -0700, Palmer Dabbelt wrote:
>> This file is expected to be included multiple times in the same file in
>> order to allow the __SYSCALL macro to generate system call tables.  With
>> a global include guard we end up missing __NR_riscv_flush_icache in the
>> syscall table, which results in icache flushes that escape the vDSO call
>> to not actually do anything.
>> The fix is to move to per-#define include guards, which allows the
>> system call tables to actually be populated.  Thanks to Macrus Comstedt
>> for finding and fixing the bug!
>> I also went ahead and fixed the SPDX header to use a //-style comment,
>> which I've been told is the canonical way to do it.
>> Cc: Marcus Comstedt <>
>> Signed-off-by: Palmer Dabbelt <>
> Fails to build riscv:allnoconfig.
> CC      arch/riscv/kernel/syscall_table.o
> ./arch/riscv/include/uapi/asm/syscalls.h:29:36: error:
> ‘sys_riscv_flush_icache’ undeclared here (not in a function); did you mean ‘__NR_riscv_flush_icache’?

Thanks.  I added you to another patch set.

      reply index

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <>
2018-08-04  8:54 ` Christoph Hellwig
2018-08-06 20:42   ` Palmer Dabbelt
2018-08-06 20:42     ` [PATCH v2] " Palmer Dabbelt
2018-08-06 21:00       ` Randy Dunlap
2018-08-07  0:11         ` Palmer Dabbelt
2018-08-07 12:45       ` Christoph Hellwig
2018-08-09  5:58       ` Christoph Hellwig
2018-08-09 20:58         ` Palmer Dabbelt
2018-08-09 13:26 ` [PATCH] " Guenter Roeck
2018-08-09 20:58   ` Palmer Dabbelt [this message]

Reply instructions:

You may reply publically to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=mhng-0e048cc1-42e3-4552-88c5-00177db30a5c@palmer-si-x1c4 \ \ \ \ \ \ \

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

LKML Archive on

Archives are clonable:
	git clone --mirror lkml/git/0.git
	git clone --mirror lkml/git/1.git
	git clone --mirror lkml/git/2.git
	git clone --mirror lkml/git/3.git
	git clone --mirror lkml/git/4.git
	git clone --mirror lkml/git/5.git
	git clone --mirror lkml/git/6.git
	git clone --mirror lkml/git/7.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 lkml lkml/ \
	public-inbox-index lkml

Newsgroup available over NNTP:

AGPL code for this site: git clone public-inbox