linux-kernel - Re: [PATCH v3 1/2] RISC-V: Define sys_riscv_flush

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Message-ID: <20180810083804.GA20415@infradead.org>
Date:   Fri, 10 Aug 2018 01:38:04 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Palmer Dabbelt <palmer@...ive.com>
Cc:     Christoph Hellwig <hch@...radead.org>, linux@...ck-us.net,
        aou@...s.berkeley.edu, Andrew Waterman <andrew@...ive.com>,
        Arnd Bergmann <arnd@...db.de>, linux-kernel@...r.kernel.org,
        linux@...inikbrodowski.net, tklauser@...tanz.ch,
        linux-riscv@...ts.infradead.org, dan.carpenter@...cle.com
Subject: Re: [PATCH v3 1/2] RISC-V: Define sys_riscv_flush_icache when SMP=n

On Thu, Aug 09, 2018 at 03:19:51PM -0700, Palmer Dabbelt wrote:
> This would be necessary to make non-SMP builds work, but there is
> another error in the implementation of our syscall linkage that actually
> just causes sys_riscv_flush_icache to never build.  I've build tested
> this on allnoconfig and allnoconfig+SMP=y, as well as defconfig like
> normal.

Would't it make sense to use COND_SYSCALL to stub out the syscall
for !SMP builds?