From owner-freebsd-hackers@FreeBSD.ORG Mon Feb 6 10:40:47 2006 Return-Path: X-Original-To: freebsd-hackers@freebsd.org Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 2FD9116A420 for ; Mon, 6 Feb 2006 10:40:47 +0000 (GMT) (envelope-from tanmayinamdar@gmail.com) Received: from pproxy.gmail.com (pproxy.gmail.com [64.233.166.176]) by mx1.FreeBSD.org (Postfix) with ESMTP id A657043D46 for ; Mon, 6 Feb 2006 10:40:46 +0000 (GMT) (envelope-from tanmayinamdar@gmail.com) Received: by pproxy.gmail.com with SMTP id e30so93465pya for ; Mon, 06 Feb 2006 02:40:45 -0800 (PST) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:mime-version:content-type; b=bd4s8olVsaxajcqyRqIri11gyzgBwNDdiTnsriW56Ya5Z5ec4gzjgDMw6skrTMc/qlm6391qabTp191Jw1osoWcsU2EMfpYFxaRCKzkRhMNtXjtpGqDxOCn4PlyWbJkLcWg3ejsBEHBJpNnY4j7Bk0cTWEVtxFdZ1q2+5iG7a1c= Received: by 10.35.127.7 with SMTP id e7mr234935pyn; Mon, 06 Feb 2006 02:34:28 -0800 (PST) Received: by 10.35.13.10 with HTTP; Mon, 6 Feb 2006 02:34:28 -0800 (PST) Message-ID: Date: Mon, 6 Feb 2006 16:04:28 +0530 From: Tanmay To: freebsd-hackers@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Subject: What is '_KERNEL' in the source ? X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 06 Feb 2006 10:40:47 -0000 Hello, In various kernel source files,i came across '#ifdef _KERNEL'. What is '_KERNEL' used for ? In some files _KERNEL is #defined to nothing ?= ? Can anybody please explain this ? TIA. Regards, Tanmay