From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E452EC43381 for ; Fri, 22 Feb 2019 10:02:27 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 603B52086C for ; Fri, 22 Feb 2019 10:02:27 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 603B52086C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 445Rhw6r05zDqP3 for ; Fri, 22 Feb 2019 21:02:24 +1100 (AEDT) Received: from ozlabs.org (bilbo.ozlabs.org [203.11.71.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 445RMt49kkzDqB3 for ; Fri, 22 Feb 2019 20:47:38 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au Received: by ozlabs.org (Postfix) id 445RMt27gbz9sDX; Fri, 22 Feb 2019 20:47:38 +1100 (AEDT) Received: by ozlabs.org (Postfix, from userid 1034) id 445RMs4hVcz9sBR; Fri, 22 Feb 2019 20:47:37 +1100 (AEDT) X-powerpc-patch-notification: thanks X-powerpc-patch-commit: 81dac817786263bb44cd5a200a07eff346f78e31 X-Patchwork-Hint: ignore In-Reply-To: <20190115063736.3679-1-mpe@ellerman.id.au> To: Michael Ellerman , linuxppc-dev@ozlabs.org From: Michael Ellerman Subject: Re: powerpc/64: Make sys_switch_endian() traceable Message-Id: <445RMs4hVcz9sBR@ozlabs.org> Date: Fri, 22 Feb 2019 20:47:37 +1100 (AEDT) X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Tue, 2019-01-15 at 06:37:36 UTC, Michael Ellerman wrote: > We weren't using SYSCALL_DEFINE for sys_switch_endian(), which means > it wasn't able to be traced by CONFIG_FTRACE_SYSCALLS. > > By using the macro we create the right metadata and the syscall is > visible. eg: > > # cd /sys/kernel/debug/tracing > # echo 1 | tee events/syscalls/sys_*_switch_endian/enable > # ~/switch_endian_test > # cat trace > ... > switch_endian_t-3604 [009] .... 315.175164: sys_switch_endian() > switch_endian_t-3604 [009] .... 315.175167: sys_switch_endian -> 0x5555aaaa5555aaaa > switch_endian_t-3604 [009] .... 315.175169: sys_switch_endian() > switch_endian_t-3604 [009] .... 315.175169: sys_switch_endian -> 0x5555aaaa5555aaaa > > Fixes: 529d235a0e19 ("powerpc: Add a proper syscall for switching endianness") > Signed-off-by: Michael Ellerman Applied to powerpc next. https://git.kernel.org/powerpc/c/81dac817786263bb44cd5a200a07eff3 cheers