From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e06smtp12.uk.ibm.com (e06smtp12.uk.ibm.com [195.75.94.108]) (using TLSv1 with cipher CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 0852D1A1A0C for ; Wed, 20 Jan 2016 20:43:37 +1100 (AEDT) Received: from localhost by e06smtp12.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 20 Jan 2016 09:43:33 -0000 Received: from b06cxnps4076.portsmouth.uk.ibm.com (d06relay13.portsmouth.uk.ibm.com [9.149.109.198]) by d06dlp03.portsmouth.uk.ibm.com (Postfix) with ESMTP id A46441B0804B for ; Wed, 20 Jan 2016 09:43:35 +0000 (GMT) Received: from d06av03.portsmouth.uk.ibm.com (d06av03.portsmouth.uk.ibm.com [9.149.37.213]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u0K9hV0P62849062 for ; Wed, 20 Jan 2016 09:43:31 GMT Received: from d06av03.portsmouth.uk.ibm.com (localhost [127.0.0.1]) by d06av03.portsmouth.uk.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u0K9hSAK030434 for ; Wed, 20 Jan 2016 02:43:30 -0700 Date: Wed, 20 Jan 2016 10:43:26 +0100 From: Heiko Carstens To: Ard Biesheuvel Cc: linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, x86@kernel.org, keescook@chromium.org, akpm@linux-foundation.org, mingo@kernel.org, hpa@zytor.com, benh@kernel.crashing.org, mpe@ellerman.id.au, mmarek@suse.cz, rusty@rustcorp.com.au Subject: Re: [PATCH 3/4] s390: enable text relative kallsyms for 64-bit targets Message-ID: <20160120094326.GD3395@osiris> References: <1453280738-18721-1-git-send-email-ard.biesheuvel@linaro.org> <1453280738-18721-4-git-send-email-ard.biesheuvel@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <1453280738-18721-4-git-send-email-ard.biesheuvel@linaro.org> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Wed, Jan 20, 2016 at 10:05:37AM +0100, Ard Biesheuvel wrote: > This enables the newly introduced text-relative kallsyms support when > building 64-bit targets. This cuts the size of the kallsyms address > table in half, reducing the memory footprint of the kernel .rodata > section by about 250 KB for a defconfig build. > > Signed-off-by: Ard Biesheuvel > --- > > diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig > index dbeeb3a049f2..588160fd1db0 100644 > --- a/arch/s390/Kconfig > +++ b/arch/s390/Kconfig > @@ -149,6 +149,7 @@ config S390 > select HAVE_REGS_AND_STACK_ACCESS_API > select HAVE_SYSCALL_TRACEPOINTS > select HAVE_VIRT_CPU_ACCOUNTING > + select KALLSYMS_TEXT_RELATIVE if 64BIT Please remove the "if 64BIT" since s390 is always 64BIT in the meantime. Tested on s390 and everything seems still to work ;) Acked-by: Heiko Carstens