linux-kernel - Re: [PATCH v5] riscv: entry: set a0 = -ENOSYS only when syscall != -1

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Message-ID: <mvmr0cin6vc.fsf@suse.de>
Date: Thu, 27 Jun 2024 10:10:31 +0200
From: Andreas Schwab <schwab@...e.de>
To: Celeste Liu <coelacanthushex@...il.com>
Cc: "Dmitry V. Levin" <ldv@...ace.io>,  Palmer Dabbelt
 <palmer@...osinc.com>,  Paul Walmsley <paul.walmsley@...ive.com>,  Albert
 Ou <aou@...s.berkeley.edu>,  Guo Ren <guoren@...nel.org>,  Björn Töpel
 <bjorn@...osinc.com>,  Conor Dooley <conor.dooley@...rochip.com>,
  linux-riscv@...ts.infradead.org,  linux-kernel@...r.kernel.org,  David
 Laight <David.Laight@...LAB.COM>,  Felix Yan <felixonmars@...hlinux.org>,
  Ruizhe Pan <c141028@...il.com>,  Shiqi Zhang <shiqi@...c.iscas.ac.cn>,
  Emil Renner Berthing <emil.renner.berthing@...onical.com>,  "Ivan A.
 Melnikov" <iv@...linux.org>
Subject: Re: [PATCH v5] riscv: entry: set a0 = -ENOSYS only when syscall != -1

On Jun 27 2024, Celeste Liu wrote:

> suggestion and we found cast long to ulong is implementation-defined
> behavior in C

There is nothing implementaton-defined in a long to ulong conversion.

-- 
Andreas Schwab, SUSE Labs, schwab@...e.de
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