Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sat, 13 Jul 2002 11:59:51 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sat, 13 Jul 2002 11:59:50 -0400 Received: from pc2-cwma1-5-cust12.swa.cable.ntl.com ([80.5.121.12]:35312 "EHLO irongate.swansea.linux.org.uk") by vger.kernel.org with ESMTP id ; Sat, 13 Jul 2002 11:59:49 -0400 Subject: Re: Advice saught on math functions From: Alan Cox To: Pavel Machek Cc: Kirk Reiser , linux-kernel@vger.kernel.org In-Reply-To: <20020713140024.GB163@elf.ucw.cz> References:

<20020713140024.GB163@elf.ucw.cz> Content-Type: text/plain Content-Transfer-Encoding: 7bit X-Mailer: Ximian Evolution 1.0.3 (1.0.3-6) Date: 13 Jul 2002 18:10:37 +0100 Message-Id: <1026580237.13885.17.camel@irongate.swansea.linux.org.uk> Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 639 Lines: 17 On Sat, 2002-07-13 at 15:00, Pavel Machek wrote: > > You can't use FPU operations in the x86 kernel. > > Actually, you can do kernel_fpu_begin(); any FPU you want; > kernel_fpu_end(); but it is rarely good idea to do that. Only Providing the CPU has FPU facilities Providing you do no blocking operation during the kernel_fpu_* range Non x86 has other rules that may be even more complex. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/