Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752601AbbKJLYa (ORCPT ); Tue, 10 Nov 2015 06:24:30 -0500 Received: from mail-pa0-f44.google.com ([209.85.220.44]:36494 "EHLO mail-pa0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752173AbbKJLY3 (ORCPT ); Tue, 10 Nov 2015 06:24:29 -0500 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 9.0 \(3094\)) Subject: Re: [PATCH] arm64: add HAVE_LATENCYTOP_SUPPORT config From: yalin wang In-Reply-To: <20151110111829.GD31947@arm.com> Date: Tue, 10 Nov 2015 19:24:22 +0800 Cc: Heiko Carstens , Catalin Marinas , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Content-Transfer-Encoding: 7bit Message-Id: References: <1446825478-24824-1-git-send-email-yalin.wang2010@gmail.com> <20151106160501.GR6087@arm.com> <247F438B-3EEA-4550-970E-A649D0E604ED@gmail.com> <20151106162109.GT6087@arm.com> <20151110074124.GB6672@osiris> <20151110100547.GC31947@arm.com> <20151110110145.GE6672@osiris> <20151110111829.GD31947@arm.com> To: Will Deacon X-Mailer: Apple Mail (2.3094) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5974 Lines: 221 > On Nov 10, 2015, at 19:18, Will Deacon wrote: > > Ha, so it does! Patch below. The only non-trivial part was arch/arm/, > which has a dependency on !SMP which I believe is no longer required > as of d5996b2ff0e2 ("ARM: fix /proc/$PID/stack on SMP"). > > Will > > --->8 > > From 8dfb40e92ac322cbd68bf9f16cbb11fc5e210269 Mon Sep 17 00:00:00 2001 > From: Will Deacon > Date: Tue, 10 Nov 2015 11:10:04 +0000 > Subject: [PATCH] Kconfig: remove HAVE_LATENCYTOP_SUPPORT > > As illustrated by a3afe70b83fd ("[S390] latencytop s390 support."), > HAVE_LATENCYTOP_SUPPORT is defined by an architecture to advertise an > implementation of save_stack_trace_tsk. > > However, as of 9212ddb5eada ("stacktrace: provide save_stack_trace_tsk() > weak alias") a dummy implementation is provided if STACKTRACE=y. > Given that LATENCYTOP already depends on STACKTRACE_SUPPORT and selects > STACKTRACE, we can remove HAVE_LATENCYTOP_SUPPORT altogether. > > Signed-off-by: Will Deacon > --- > arch/arc/Kconfig | 3 --- > arch/arm/Kconfig | 5 ----- > arch/metag/Kconfig | 3 --- > arch/microblaze/Kconfig | 3 --- > arch/parisc/Kconfig | 3 --- > arch/powerpc/Kconfig | 3 --- > arch/s390/Kconfig | 3 --- > arch/sh/Kconfig | 3 --- > arch/sparc/Kconfig | 4 ---- > arch/unicore32/Kconfig | 3 --- > arch/x86/Kconfig | 3 --- > lib/Kconfig.debug | 1 - > 12 files changed, 37 deletions(-) > > diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig > index 2c2ac3f3ff80..6dc312fd6480 100644 > --- a/arch/arc/Kconfig > +++ b/arch/arc/Kconfig > @@ -73,9 +73,6 @@ config STACKTRACE_SUPPORT > def_bool y > select STACKTRACE > > -config HAVE_LATENCYTOP_SUPPORT > - def_bool y > - > config HAVE_ARCH_TRANSPARENT_HUGEPAGE > def_bool y > depends on ARC_MMU_V4 > diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig > index 35854e8d97ff..94eff0c6b0f8 100644 > --- a/arch/arm/Kconfig > +++ b/arch/arm/Kconfig > @@ -162,11 +162,6 @@ config STACKTRACE_SUPPORT > bool > default y > > -config HAVE_LATENCYTOP_SUPPORT > - bool > - depends on !SMP > - default y > - > config LOCKDEP_SUPPORT > bool > default y > diff --git a/arch/metag/Kconfig b/arch/metag/Kconfig > index 0b389a81c43a..a0fa88da3e31 100644 > --- a/arch/metag/Kconfig > +++ b/arch/metag/Kconfig > @@ -36,9 +36,6 @@ config STACKTRACE_SUPPORT > config LOCKDEP_SUPPORT > def_bool y > > -config HAVE_LATENCYTOP_SUPPORT > - def_bool y > - > config RWSEM_GENERIC_SPINLOCK > def_bool y > > diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig > index 0bce820428fc..5ecd0287a874 100644 > --- a/arch/microblaze/Kconfig > +++ b/arch/microblaze/Kconfig > @@ -67,9 +67,6 @@ config STACKTRACE_SUPPORT > config LOCKDEP_SUPPORT > def_bool y > > -config HAVE_LATENCYTOP_SUPPORT > - def_bool y > - > source "init/Kconfig" > > source "kernel/Kconfig.freezer" > diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig > index c36546959e86..16276d505cd6 100644 > --- a/arch/parisc/Kconfig > +++ b/arch/parisc/Kconfig > @@ -79,9 +79,6 @@ config TIME_LOW_RES > depends on SMP > default y > > -config HAVE_LATENCYTOP_SUPPORT > - def_bool y > - > # unless you want to implement ACPI on PA-RISC ... ;-) > config PM > bool > diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig > index db49e0d796b1..89210bfdfc7a 100644 > --- a/arch/powerpc/Kconfig > +++ b/arch/powerpc/Kconfig > @@ -47,9 +47,6 @@ config STACKTRACE_SUPPORT > bool > default y > > -config HAVE_LATENCYTOP_SUPPORT > - def_bool y > - > config TRACE_IRQFLAGS_SUPPORT > bool > default y > diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig > index 3a55f493c7da..69e22b502d09 100644 > --- a/arch/s390/Kconfig > +++ b/arch/s390/Kconfig > @@ -10,9 +10,6 @@ config LOCKDEP_SUPPORT > config STACKTRACE_SUPPORT > def_bool y > > -config HAVE_LATENCYTOP_SUPPORT > - def_bool y > - > config RWSEM_GENERIC_SPINLOCK > bool > > diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig > index d514df7e04dd..6c391a5d3e5c 100644 > --- a/arch/sh/Kconfig > +++ b/arch/sh/Kconfig > @@ -130,9 +130,6 @@ config STACKTRACE_SUPPORT > config LOCKDEP_SUPPORT > def_bool y > > -config HAVE_LATENCYTOP_SUPPORT > - def_bool y > - > config ARCH_HAS_ILOG2_U32 > def_bool n > > diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig > index 56442d2d7bbc..3203e42190dd 100644 > --- a/arch/sparc/Kconfig > +++ b/arch/sparc/Kconfig > @@ -101,10 +101,6 @@ config LOCKDEP_SUPPORT > bool > default y if SPARC64 > > -config HAVE_LATENCYTOP_SUPPORT > - bool > - default y if SPARC64 > - > config ARCH_HIBERNATION_POSSIBLE > def_bool y if SPARC64 > > diff --git a/arch/unicore32/Kconfig b/arch/unicore32/Kconfig > index c9faddc61100..910aaaaed969 100644 > --- a/arch/unicore32/Kconfig > +++ b/arch/unicore32/Kconfig > @@ -33,9 +33,6 @@ config NO_IOPORT_MAP > config STACKTRACE_SUPPORT > def_bool y > > -config HAVE_LATENCYTOP_SUPPORT > - def_bool y > - > config LOCKDEP_SUPPORT > def_bool y > > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig > index db3622f22b61..9574f7d1fe97 100644 > --- a/arch/x86/Kconfig > +++ b/arch/x86/Kconfig > @@ -177,9 +177,6 @@ config LOCKDEP_SUPPORT > config STACKTRACE_SUPPORT > def_bool y > > -config HAVE_LATENCYTOP_SUPPORT > - def_bool y > - > config MMU > def_bool y > > diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug > index 16bf3bc25e3e..6984710e75c9 100644 > --- a/lib/Kconfig.debug > +++ b/lib/Kconfig.debug > @@ -1547,7 +1547,6 @@ config FAULT_INJECTION_STACKTRACE_FILTER > > config LATENCYTOP > bool "Latency measuring infrastructure" > - depends on HAVE_LATENCYTOP_SUPPORT > depends on DEBUG_KERNEL > depends on STACKTRACE_SUPPORT > depends on PROC_FS > -- > 2.1.4 seems fine. :) -- 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/