From nobody Tue Jan 6 07:49:18 2026 X-Original-To: dev-commits-src-main@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4dljwt3Zdnz6NHfC for ; Tue, 06 Jan 2026 07:49:18 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R13" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4dljwt1nyfz3nRK for ; Tue, 06 Jan 2026 07:49:18 +0000 (UTC) (envelope-from git@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1767685758; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=PBbsJakUtqwepxopSHXpl9ZzbZ6LobNpocUyTXC7ZHI=; b=yLiciAKiwkLI/BhNplRU2z757w0VsVn3/RG8dCMUuoH9XjBTRp4HkKnG2cQxSReWa4fARA 3b5UlT2UKCQtaciS9tgIQI/MywSHGB397WgFZvZ01ZxTSsBUuti8+Q3khToEchuU9+O81s 3rgVW5zOREPShSTvC9gFjVHKohH+itrF+XPrEBGZw6x7nteZQz45ispZIQPlIyLWJ0LFfO lBTsjsjvj/rkIgkTjkoN1w8/qEjfzf5jBKcIT1HkN5bQynPFQHnygeN0J/C1O0/djaUndA /ymuyFQlC+XjmCQ6Wx9zkFmfFQdz0be2Dc8eknIxXeg6xaGb8J1E210wLVRKWw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1767685758; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=PBbsJakUtqwepxopSHXpl9ZzbZ6LobNpocUyTXC7ZHI=; b=YzSoC2D0sESuWn2QjvSTTRXP3JmRN7dHrYBdiV7ScF8FVyfv3oRK/ni9OUGlM86ArIgX/c W3L7mglbbvmOL0v9secR+xiBNkkq87tsEPWXWTNa4SVCj4teqv58WENkFnDyDnDXWEpa/4 YoQ2mfAVh68bx/eaW0EaN9Mh2bDgMt3QNCGqMoZ1XKRnXBUiWrkP6VXNP7TzbwpruCaX3s c4NzW9QSS7tajDzz5sUBubLWA9KkdNftULdkTXOhv+oM1Jvys/K2AeoL0kTqzeWHpfObEd Gp6B6knBACY07MHLMxXdKTWIAgzbM0B+BnLXJLNGKXFH3yKa0ruwRtTV9vDagQ== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1767685758; a=rsa-sha256; cv=none; b=lfj10sO/PcQMEoGDgKM9V8W4WnxWktJU4T/oyPpryqf+juiyNHl8vHtYvg61zmfTgVibIL gBg57JopxlQiD4kIGO+NQlz3ip2CepXWfYIfYSnWIlR0s0S8gXfQr2np1/EWOutlfwYjDu L5u1k8vSVywvsv8CVlNMUzgfZdoR+wZTwJe+BJU5diEcOPsHuyoa6duFXvN6SorO9SRDLF kGRAUW7i1xOChjOvh7j0ou7/u9PJk7Liszl/zHOKS1+iq+hN2sqG4MnDn4J+XztvtZnUnE w1Topj7fkD6y8D7c5G2yp8QfSCOCDG5ECChHhT4pyMC5/YuFvZi3XBNeQV2vsA== ARC-Authentication-Results: i=1; mx1.freebsd.org; none Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) by mxrelay.nyi.freebsd.org (Postfix) with ESMTP id 4dljwt131Jzy0M for ; Tue, 06 Jan 2026 07:49:18 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from git (uid 1279) (envelope-from git@FreeBSD.org) id 3daf1 by gitrepo.freebsd.org (DragonFly Mail Agent v0.13+ on gitrepo.freebsd.org); Tue, 06 Jan 2026 07:49:18 +0000 To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Cc: Anagh Verma From: Enji Cooper Subject: git: f384784289db - main - kern_syscall_deregister: document syscall 0 no-op logic List-Id: Commit messages for the main branch of the src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-main List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: dev-commits-src-main@freebsd.org Sender: owner-dev-commits-src-main@FreeBSD.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: ngie X-Git-Repository: src X-Git-Refname: refs/heads/main X-Git-Reftype: branch X-Git-Commit: f384784289dba13b90138a89d3df3a8ea063aff9 Auto-Submitted: auto-generated Date: Tue, 06 Jan 2026 07:49:18 +0000 Message-Id: <695cbe7e.3daf1.20a5a762@gitrepo.freebsd.org> The branch main has been updated by ngie: URL: https://cgit.FreeBSD.org/src/commit/?id=f384784289dba13b90138a89d3df3a8ea063aff9 commit f384784289dba13b90138a89d3df3a8ea063aff9 Author: Anagh Verma AuthorDate: 2026-01-06 07:42:56 +0000 Commit: Enji Cooper CommitDate: 2026-01-06 07:48:54 +0000 kern_syscall_deregister: document syscall 0 no-op logic Document syscall #0 being handled specially in `kern_syscall_deregister(..)`: it's a reserved syscall and not dynamically registered, and hence does not need to be deregistered in the function. Co-authored-by: ngie@ MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D54326 --- sys/kern/kern_syscalls.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/sys/kern/kern_syscalls.c b/sys/kern/kern_syscalls.c index a93d711e7597..7ddc28ed4e26 100644 --- a/sys/kern/kern_syscalls.c +++ b/sys/kern/kern_syscalls.c @@ -161,8 +161,14 @@ kern_syscall_deregister(struct sysent *sysents, int offset, { struct sysent *se; - if (offset == 0) - return (0); /* XXX? */ + if (offset == 0) { + /* + * Syscall #0 is reserved and is not dynamically registered. + * Treat deregistration as a no-op to simplify module unload + * paths. + */ + return (0); + } se = &sysents[offset]; if ((se->sy_thrcnt & SY_THR_STATIC) != 0)