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 Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 052E1C433EF for ; Thu, 9 Jun 2022 14:46:11 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4LJn355259z3chV for ; Fri, 10 Jun 2022 00:46:09 +1000 (AEST) Received: from gandalf.ozlabs.org (gandalf.ozlabs.org [150.107.74.76]) (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 4LJn2G1vtxz3bmQ for ; Fri, 10 Jun 2022 00:45:26 +1000 (AEST) Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mail.ozlabs.org (Postfix) with ESMTPSA id 4LJn2G1Cncz4xZ4; Fri, 10 Jun 2022 00:45:26 +1000 (AEST) From: Michael Ellerman To: linuxppc-dev@lists.ozlabs.org, Michael Ellerman In-Reply-To: <20220525032639.1947280-1-mpe@ellerman.id.au> References: <20220525032639.1947280-1-mpe@ellerman.id.au> Subject: Re: [PATCH] powerpc: Don't select HAVE_IRQ_EXIT_ON_IRQ_STACK Message-Id: <165478587253.589231.16242247816940188081.b4-ty@ellerman.id.au> Date: Fri, 10 Jun 2022 00:44:32 +1000 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit 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: , Cc: npiggin@gmail.com Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Wed, 25 May 2022 13:26:39 +1000, Michael Ellerman wrote: > The HAVE_IRQ_EXIT_ON_IRQ_STACK option tells generic code that irq_exit() > is called while still running on the hard irq stack (hardirq_ctx[] in > the powerpc code). > > Selecting the option means the generic code will *not* switch to the > softirq stack before running softirqs, because the code is already > running on the (mostly empty) hard irq stack. > > [...] Applied to powerpc/fixes. [1/1] powerpc: Don't select HAVE_IRQ_EXIT_ON_IRQ_STACK https://git.kernel.org/powerpc/c/1346d00e1bdfd4067f92bc14e8a6131a01de4190 cheers