linux-kernel - Re: [PATCH 9/9] RISC-V: Build Infastructure

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Message-ID: <20170628212500.GN6973@jhogan-linux.le.imgtec.org>
Date:   Wed, 28 Jun 2017 22:25:00 +0100
From:   James Hogan <james.hogan@...tec.com>
To:     Palmer Dabbelt <palmer@...belt.com>
CC:     <peterz@...radead.org>, <mingo@...hat.com>, <mcgrof@...nel.org>,
        <viro@...iv.linux.org.uk>, <sfr@...b.auug.org.au>,
        <nicolas.dichtel@...nd.com>, <rmk+kernel@...linux.org.uk>,
        <msalter@...hat.com>, <tklauser@...tanz.ch>, <will.deacon@....com>,
        <paul.gortmaker@...driver.com>, <linux@...ck-us.net>,
        <linux-kernel@...r.kernel.org>, <linux-arch@...r.kernel.org>,
        <albert@...ive.com>
Subject: Re: [PATCH 9/9] RISC-V: Build Infastructure

Hi Palmer,

On Wed, Jun 28, 2017 at 11:55:38AM -0700, Palmer Dabbelt wrote:
> +	select SYSRISCV_ATOMIC if !ISA_A
...
> +config SYSRISCV_ATOMIC
> +	bool "Include support for atomic operation syscalls"
> +	default !ISA_A
> +	help
> +	  If atomic memory instructions are present, i.e.,
> +	  CONFIG_ISA_A, this includes support for the syscall that
> +	  provides atomic accesses.  This is only useful to run
> +	  binaries that require atomic access but were compiled with
> +	  -mno-atomic.
> +
> +	  If CONFIG_ISA_A is unset, this option is mandatory.
> +
> +	  If you don't know what to do here, say N.

Can this be removed now that you mentioned the atomics syscall being
mandatory? I can't find any other references to it.

Cheers
James

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