From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-bn3nam01on0138.outbound.protection.outlook.com ([104.47.33.138]:24890 "EHLO NAM01-BN3-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752581AbeBCSBT (ORCPT ); Sat, 3 Feb 2018 13:01:19 -0500 From: Sasha Levin To: "linux-kernel@vger.kernel.org" , "stable@vger.kernel.org" CC: John David Anglin , Helge Deller , Sasha Levin Subject: [PATCH AUTOSEL for 4.14 016/110] parisc: Reduce thread stack to 16 kb Date: Sat, 3 Feb 2018 18:00:34 +0000 Message-ID: <20180203180015.29073-16-alexander.levin@microsoft.com> References: <20180203180015.29073-1-alexander.levin@microsoft.com> In-Reply-To: <20180203180015.29073-1-alexander.levin@microsoft.com> Content-Language: en-US Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org List-ID: From: John David Anglin [ Upstream commit da57c5414f49ef9e4bcb9ae0bbafd1d650b31411 ] In testing, I found that the thread stack can be 16 kB when using an irq stack. Without it, the thread stack needs to be 32 kB. Currently, the irq stack is 32 kB. While it probably could be 16 kB, I would prefer to leave i= t as is for safety. Signed-off-by: John David Anglin Signed-off-by: Helge Deller Signed-off-by: Sasha Levin --- arch/parisc/include/asm/thread_info.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/parisc/include/asm/thread_info.h b/arch/parisc/include/as= m/thread_info.h index c980a02a52bc..598c8d60fa5e 100644 --- a/arch/parisc/include/asm/thread_info.h +++ b/arch/parisc/include/asm/thread_info.h @@ -35,7 +35,12 @@ struct thread_info { =20 /* thread information allocation */ =20 +#ifdef CONFIG_IRQSTACKS +#define THREAD_SIZE_ORDER 2 /* PA-RISC requires at least 16k stack */ +#else #define THREAD_SIZE_ORDER 3 /* PA-RISC requires at least 32k stack */ +#endif + /* Be sure to hunt all references to this down when you change the size of * the kernel stack */ #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER) --=20 2.11.0