From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jens Axboe Subject: Re: [PATCH 2/11] x86: convert to generic helpers for IPI function calls Date: Tue, 22 Apr 2008 10:43:15 +0200 Message-ID: <20080422084315.GT12774@kernel.dk> References: <1208851058-8500-1-git-send-email-jens.axboe@oracle.com> <1208851058-8500-3-git-send-email-jens.axboe@oracle.com> <20080422083810.GA23540@uranus.ravnborg.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20080422083810.GA23540-QabhHTsIXMSnlFQ6Q1D1Y0B+6BGkLq7r@public.gmane.org> Sender: linux-arch-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: To: Sam Ravnborg Cc: linux-arch-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, npiggin-l3A5Bk7waGM@public.gmane.org, torvalds-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org, Ingo Molnar On Tue, Apr 22 2008, Sam Ravnborg wrote: > On Tue, Apr 22, 2008 at 09:57:28AM +0200, Jens Axboe wrote: > > This converts x86 and x86-64 to use the new helpers for > > smp_call_function() and friends, and adds support for > > smp_call_function_single(). > > > > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig > > index 87a693c..aab97e3 100644 > > --- a/arch/x86/Kconfig > > +++ b/arch/x86/Kconfig > > @@ -156,6 +156,11 @@ config GENERIC_PENDING_IRQ > > depends on GENERIC_HARDIRQS && SMP > > default y > > > > +config GENERIC_SMP_HELPERS > > + bool > > + depends on SMP > > + default y > > + > > Hi Jens. > > [Not x86 specific - it was the first patch > touching a Kconfig file] > > Could we define a single config variable > in for example kernel/Kconfig(*) > like this: > > config HAVE_GENERIC_SMP_HELPERS > def_bool n > > And then the archs that uses the generic SMP helpers just > do a simple: > > config X86 > + select HAVE_GENERIC_SMP_HELPERS > > > This is the recommended method today and is documented > in Documentation/kbuild/kconfig-language.txt if > you need a bit more intro. > > (*) I know we do not have kernel/Kconfig today. > But maybe this is a good time to add it and > source it from arch/Kconfig Ah yes, that looks like a better approach. I'll adapt the patches to this method instead of selecting smp.o, thanks. -- Jens Axboe From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from brick.kernel.dk ([87.55.233.238]:13497 "EHLO kernel.dk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756834AbYDVInT (ORCPT ); Tue, 22 Apr 2008 04:43:19 -0400 Date: Tue, 22 Apr 2008 10:43:15 +0200 From: Jens Axboe Subject: Re: [PATCH 2/11] x86: convert to generic helpers for IPI function calls Message-ID: <20080422084315.GT12774@kernel.dk> References: <1208851058-8500-1-git-send-email-jens.axboe@oracle.com> <1208851058-8500-3-git-send-email-jens.axboe@oracle.com> <20080422083810.GA23540@uranus.ravnborg.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080422083810.GA23540@uranus.ravnborg.org> Sender: linux-arch-owner@vger.kernel.org List-ID: To: Sam Ravnborg Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, npiggin@suse.de, torvalds@linux-foundation.org, Ingo Molnar Message-ID: <20080422084315.h_MxWBEkcV6IVhuhoKCg5TUINmCsJ-Jk5mESUWEnQlA@z> On Tue, Apr 22 2008, Sam Ravnborg wrote: > On Tue, Apr 22, 2008 at 09:57:28AM +0200, Jens Axboe wrote: > > This converts x86 and x86-64 to use the new helpers for > > smp_call_function() and friends, and adds support for > > smp_call_function_single(). > > > > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig > > index 87a693c..aab97e3 100644 > > --- a/arch/x86/Kconfig > > +++ b/arch/x86/Kconfig > > @@ -156,6 +156,11 @@ config GENERIC_PENDING_IRQ > > depends on GENERIC_HARDIRQS && SMP > > default y > > > > +config GENERIC_SMP_HELPERS > > + bool > > + depends on SMP > > + default y > > + > > Hi Jens. > > [Not x86 specific - it was the first patch > touching a Kconfig file] > > Could we define a single config variable > in for example kernel/Kconfig(*) > like this: > > config HAVE_GENERIC_SMP_HELPERS > def_bool n > > And then the archs that uses the generic SMP helpers just > do a simple: > > config X86 > + select HAVE_GENERIC_SMP_HELPERS > > > This is the recommended method today and is documented > in Documentation/kbuild/kconfig-language.txt if > you need a bit more intro. > > (*) I know we do not have kernel/Kconfig today. > But maybe this is a good time to add it and > source it from arch/Kconfig Ah yes, that looks like a better approach. I'll adapt the patches to this method instead of selecting smp.o, thanks. -- Jens Axboe