From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6D7A030E0F4 for ; Thu, 22 Jan 2026 10:27:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769077670; cv=none; b=sQTzFSTMH0oJDIvLumRXvzgVJvrnNely/f/vp2Iih/WQG5DCE9ZDfP5iHKxlUDI1Yf2ZU9OIs2ZZ3isWPIkf8lypFtMW3HFZ+Psss25JOhigLcntSgzPicmcapRpOK9pzOGiQizyW9j/rAbUXLXwA8N8n63kVmD9ZCSQU76l4DI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769077670; c=relaxed/simple; bh=OeivXOaV30guu1PmajmK/XSeMsLGc9hAT6DOW3UEViw=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=lAcSRbRmwupBBzYeqKnOGo2ehLol8Gfl5/dwYD1SqYaviCnSpwcDC412WlROFKEWw1hd2o+lTb+gNx03f7Us+5A1wI8o1L7C6QyuPHx75u7BTJHV+yTGogpYGOfRFQov05kd9rMoC60S3WoOTlkCtz7N+BenAHQr1p8eGxPom78= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=KoJzjRMG; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="KoJzjRMG" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A6066C116C6; Thu, 22 Jan 2026 10:27:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1769077668; bh=OeivXOaV30guu1PmajmK/XSeMsLGc9hAT6DOW3UEViw=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=KoJzjRMGMSQqjkZ80Vf0Sr+WbMWa3ustxr0TtvRX6IqT/yZEGklnfa0AuM763mcbQ k5BSCrrFTmB8KgYQJg9/Wn1t0K4q0+RJBC3pw4kiG8h7k6/mMDeEBynKOGU3vN/VUl QIROFCdDbbb0xY/vtPTaguBDkbQ7mKoyAXsXaWu9/9H5QWV/LeZ61czDkX1GHd0BRL E1KyohSR4Ukmmg1Dz1pHx5qEztxa8rD1H9soC0it/eIQIhJ8I0LsCwlE4RkvRxgntA psSdvhwOPygFQcvayV2mnxZ3Xk4HluqhO6R+ZcHnZFog9bLTgZ3uyIt1dSU1BToIfq uBgkIfpPxOO8g== Message-ID: Date: Thu, 22 Jan 2026 11:27:43 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] powerpc/vdso: Provide clock_getres_time64() To: =?UTF-8?Q?Thomas_Wei=C3=9Fschuh?= , "Sverdlin, Alexander" Cc: "npiggin@gmail.com" , "luto@kernel.org" , "maddy@linux.ibm.com" , "tglx@kernel.org" , "mpe@ellerman.id.au" , "vincenzo.frascino@arm.com" , "linuxppc-dev@lists.ozlabs.org" , "linux-kernel@vger.kernel.org" References: <20260114-vdso-powerpc-align-v1-1-acf09373d568@linutronix.de> <20260122104257-3124dc96-5916-4d25-bbce-9b868b30ee18@linutronix.de> Content-Language: fr-FR From: "Christophe Leroy (CS GROUP)" In-Reply-To: <20260122104257-3124dc96-5916-4d25-bbce-9b868b30ee18@linutronix.de> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Hi Thomas, Le 22/01/2026 à 10:50, Thomas Weißschuh a écrit : > Hi Alexander, > > On Thu, Jan 22, 2026 at 09:39:09AM +0000, Sverdlin, Alexander wrote: >> Hi Thomas, Christophe, >> >> On Wed, 2026-01-14 at 08:26 +0100, Thomas Weißschuh wrote: >>> For consistency with __vdso_clock_gettime64() there should also be a >>> 64-bit variant of clock_getres(). This will allow the extension of >>> CONFIG_COMPAT_32BIT_TIME to the vDSO and finally the removal of 32-bit >>> time types from the kernel and UAPI. >>> >>> Signed-off-by: Thomas Weißschuh >> >> I've bisected this patch to cause the following build failure on my side: >> >> LDS arch/powerpc/kernel/vdso/vdso32.lds >> VDSO32A arch/powerpc/kernel/vdso/sigtramp32-32.o >> VDSO32A arch/powerpc/kernel/vdso/gettimeofday-32.o >> VDSO32A arch/powerpc/kernel/vdso/datapage-32.o >> VDSO32A arch/powerpc/kernel/vdso/cacheflush-32.o >> VDSO32A arch/powerpc/kernel/vdso/note-32.o >> VDSO32A arch/powerpc/kernel/vdso/getcpu-32.o >> VDSO32A arch/powerpc/kernel/vdso/getrandom-32.o >> VDSO32A arch/powerpc/kernel/vdso/vgetrandom-chacha-32.o >> VDSO32C arch/powerpc/kernel/vdso/vgettimeofday-32.o >> VDSO32C arch/powerpc/kernel/vdso/vgetrandom-32.o >> VDSO32A arch/powerpc/kernel/vdso/crtsavres-32.o >> VDSO32L arch/powerpc/kernel/vdso/vdso32.so.dbg >> arch/powerpc/kernel/vdso/vdso32.so.dbg: dynamic relocations are not supported >> make[2]: *** [arch/powerpc/kernel/vdso/Makefile:79: arch/powerpc/kernel/vdso/vdso32.so.dbg] Error 1 >> make[1]: *** [arch/powerpc/Makefile:388: vdso_prepare] Error 2 > > Thanks for the report! > >> Does it ring any bells? What could I try/test? > > Not immediately, but I'll look into it. > >> I'm using gcc-15.2.0 and binutils 2.45.1. > > Is this a toolchain from https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fcdn.kernel.org%2Fpub%2Ftools%2Fcrosstool%2F&data=05%7C02%7Cchristophe.leroy%40csgroup.eu%7C03b93d2aa659407b3e5a08de599bb85e%7C8b87af7d86474dc78df45f69a2011bb5%7C0%7C0%7C639046722536758587%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=b9WoZvMR2V3RUpOwrJtm6kmXrpnLti%2BeMJ6zpyB%2Fv4k%3D&reserved=0 ? > Could you also share your configuration? I've just been able to reproduce it with ppc64_defconfig + CONFIG_CC_OPTIMIZE_FOR_SIZE VDSO32L arch/powerpc/kernel/vdso/vdso32.so.dbg arch/powerpc/kernel/vdso/vdso32.so.dbg: dynamic relocations are not supported make[2]: *** [arch/powerpc/kernel/vdso/Makefile:79: arch/powerpc/kernel/vdso/vdso32.so.dbg] Error 1 make[1]: *** [arch/powerpc/Makefile:388: vdso_prepare] Error 2 make: *** [Makefile:248: __sub-make] Error 2 I'll investigate Christophe > >>> --- >>> Based on tip/timers/vdso. >>> >>> This was missed in the original vdso_getres_time64() series as powerpc >>> does not use include/vdso/gettime.h. >>> --- >>> arch/powerpc/include/asm/vdso/gettimeofday.h | 2 ++ >>> arch/powerpc/kernel/vdso/gettimeofday.S | 12 ++++++++++++ >>> arch/powerpc/kernel/vdso/vdso32.lds.S | 1 + >>> arch/powerpc/kernel/vdso/vgettimeofday.c | 6 ++++++ >>> 4 files changed, 21 insertions(+) > > (...)