From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 89022C43458 for ; Tue, 7 Jul 2026 19:07:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:Subject:Cc:To: From:Message-ID:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: List-Owner; bh=XT/0yajMTKLGjriZhTUWkr3shKhUhIXfq1sJeWU7Zec=; b=VqP6aTo22AHE7H WcSEGFBzNUoK+te+j/gkMBeCoiJ07eW25JgPL9pp6fJQM6jFyLcco3j7i/YPeO7GEoFwJkOZ83EK+ tFXCDbzf9rihyKC7+qoOciXm+yxcswF4rkB4IzZizySLfwYiAuNx8KZPD/nbOOA5fdfRYLqYzyGlo eN7354ucq5204cWNohzb0N8SAT64ebviN0ZMiy3I0YAqpJ5oTnnKvMvl/kU88oMBGKgq0Co4sr7Wi RvPrcqEJhlFtC81sSuuoIqg/gabCAofdv0FFqDlOJHv77RZ/fk5IZuoukJNXMlu10oc6k+S1llVrx M78xPM/EaBGBwYDXq7hg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1whB8V-0000000FhoY-0kh2; Tue, 07 Jul 2026 19:07:15 +0000 Received: from sea.source.kernel.org ([2600:3c0a:e001:78e:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1whB7v-0000000FhDX-0Szs; Tue, 07 Jul 2026 19:06:39 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id D33BD43592; Tue, 7 Jul 2026 19:06:38 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E87121F00A3A; Tue, 7 Jul 2026 19:06:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1783451198; bh=bOhoOM4hOcQqUzsvXhQz1H8YtW+B68Wkj0kvWsv9ysw=; h=Date:From:To:Cc:Subject:References; b=h91mvxoSmiGeQM8FkyaGYFZNxd9/IUcToDeSMIPvZRCL7a8UMwB0b0QBesp5xIbLU i7PsT94Sw2onA3+UmpAOBRZfRcPLnTsutjo1QPB6poAvdbvPFcNvVkGP1hB6jDLYDb RKWnZ0yte8HArLwcv9oJe3tjBUUeDOAyh5mMWkxYWu67e92T5hj3A/OUFslD9ZYdOb CoRjmiJVDNi/JotogxyAKQWnRnlRYa4L0e21jTcDihICBULLgdAZvlp5GRhmagJ2DT +Aa9ucQxYNr6w3TZVbEH8jmFMex+6xgUViSmWosj6uNAuMiuHhylsKUcB2NMwZIOYT B1ISbmvWG+Pgw== Date: Tue, 07 Jul 2026 21:06:36 +0200 Message-ID: <20260707190254.181086755@kernel.org> User-Agent: quilt/0.69 From: Thomas Gleixner To: LKML Cc: Peter Zijlstra , Michael Ellerman , Shrikanth Hegde , linuxppc-dev@lists.ozlabs.org, Kees Cook , Huacai Chen , loongarch@lists.linux.dev, Paul Walmsley , Palmer Dabbelt , linux-riscv@lists.infradead.org, Sven Schnelle , linux-s390@vger.kernel.org, x86@kernel.org, Mark Rutland , Jinjie Ruan , Andy Lutomirski , Oleg Nesterov , Richard Henderson , Russell King , Catalin Marinas , Guo Ren , Geert Uytterhoeven , Thomas Bogendoerfer , Helge Deller , Yoshinori Sato , Richard Weinberger , Chris Zankel , linux-arm-kernel@lists.infradead.org, linux-alpha@vger.kernel.org, linux-csky@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linux-sh@vger.kernel.org, linux-um@lists.infradead.org, Arnd Bergmann , Vineet Gupta , Will Deacon , Brian Cain , Michal Simek , Dinh Nguyen , "David S. Miller" , Andreas Larsson , linux-snps-arc@lists.infradead.org, linux-hexagon@vger.kernel.org, linux-openrisc@vger.kernel.org, sparclinux@vger.kernel.org, linux-arch@vger.kernel.org, =?UTF-8?q?Michal=20Such=C3=A1nek?= , Jonathan Corbet , linux-doc@vger.kernel.org Subject: [patch 10/18] entry: Use syscall number instead of rereading it References: <20260707181957.433213175@kernel.org> MIME-Version: 1.0 X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org rseq_syscall_enter_work() is invoked before the syscall number can be modified. So there is no point in rereading it from pt_regs. Signed-off-by: Thomas Gleixner --- include/linux/entry-common.h | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) --- a/include/linux/entry-common.h +++ b/include/linux/entry-common.h @@ -70,9 +70,10 @@ static inline void syscall_enter_audit(s } } -static __always_inline long syscall_trace_enter(struct pt_regs *regs, unsigned long work) +static __always_inline long syscall_trace_enter(struct pt_regs *regs, unsigned long work, + long syscall) { - long syscall, ret = 0; + long ret = 0; /* * Handle Syscall User Dispatch. This must comes first, since @@ -90,7 +91,7 @@ static __always_inline long syscall_trac * through hrtimer_interrupt(). */ if (work & SYSCALL_WORK_SYSCALL_RSEQ_SLICE) - rseq_syscall_enter_work(syscall_get_nr(current, regs)); + rseq_syscall_enter_work(syscall); /* Handle ptrace */ if (work & (SYSCALL_WORK_SYSCALL_TRACE | SYSCALL_WORK_SYSCALL_EMU)) { @@ -145,7 +146,7 @@ static __always_inline long syscall_ente unsigned long work = READ_ONCE(current_thread_info()->syscall_work); if (work & SYSCALL_WORK_ENTER) - syscall = syscall_trace_enter(regs, work); + syscall = syscall_trace_enter(regs, work, syscall); return syscall; } _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv