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From: Florian Weimer <fw@deneb.enyo.de>
To: Xi Ruoyao via Libc-alpha <libc-alpha@sourceware.org>
Cc: Xi Ruoyao <xry111@xry111.site>,  caiyinyu <caiyinyu@loongson.cn>,  Wang
 Xuerui <i@xen0n.name>,  Adhemerval Zanella Netto
 <adhemerval.zanella@linaro.org>,  Andreas Schwab <schwab@suse.de>
Subject: Re: [PATCH] linux: Allow avoiding va_list for generic syscall and
 use it for LoongArch
References: <20230324072745.4138-1-xry111@xry111.site>
Date: Fri, 24 Mar 2023 10:47:57 +0100
In-Reply-To: <20230324072745.4138-1-xry111@xry111.site> (Xi Ruoyao via
	Libc-alpha's message of "Fri, 24 Mar 2023 15:27:45 +0800")
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* Xi Ruoyao via Libc-alpha:

> Currently GCC generates highly sub-optimal code on architectures where
> the calling convention prefers registers for arugment passing.  This is

Typo: ar[gu]ment

> LoongArch is benefited from this (saving about 430 CPU cycles per
> syscall, though I won't call it a significant improvement because
> syscall is "slow" in nature).  And in the future we may switch more
> ports to use the generic syscall without a performance regression,
> reducing the number of target-specific syscall.{c,S} files we need to
> maintain.

Does this impact the open* and fcntl* wrappers as well?