From patchwork Thu Oct 29 22:18:21 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 11867765 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 84F7216C0 for ; Thu, 29 Oct 2020 22:32:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5CA66221F8 for ; Thu, 29 Oct 2020 22:32:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="OGd5ItDy"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="TjFVp80l" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725993AbgJ2Wcj (ORCPT ); Thu, 29 Oct 2020 18:32:39 -0400 Received: from Galois.linutronix.de ([193.142.43.55]:37650 "EHLO galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725856AbgJ2Wch (ORCPT ); Thu, 29 Oct 2020 18:32:37 -0400 Message-Id: <20201029222652.084086429@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1604010747; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: references:references; bh=u8HY47nQ1rEETIi4/9zdfAjblKurxchJCqLvsv7KpOQ=; b=OGd5ItDyZBG68g3Q+c21dg4YXqY6AU1fXntD0+4qRXFtAe9myI4S09jA8H5H52VIX6TbEw aripnIS0SkNeYd+9JaqJwHgPrF7G/QJzIJsmG3t8J40PuwxNo4M4l462GtszWUqe/bGtPs EMM+rXz872Zoer5cxsZcfpRMdIL6T2x6t1VE1Oan43+7K0ue8xxuUk5fWBdH9MPlETFuAR YoW9hBRdPZPiPGWDdPc/LK8Wpp0EfGM/tvtHR1KCrHHT+ZmiaZScGhfv5l6MH8jlTjGe9u iSt0tQstZ8WNpIvZuQfExYSsXD1wmG497Zjs0XzmNiX4irdf9nzD5T/IQuWKAw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1604010747; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: references:references; bh=u8HY47nQ1rEETIi4/9zdfAjblKurxchJCqLvsv7KpOQ=; b=TjFVp80l5Qxxiam18N27u7sQ7uvrjLOllX7xFjN/pV6e7D2EkdlFHRvIYC7x8vzRhlstTr cTQN3Or0UpEtVZCQ== Date: Thu, 29 Oct 2020 23:18:21 +0100 From: Thomas Gleixner To: LKML Cc: linux-arch@vger.kernel.org, Linus Torvalds , Peter Zijlstra , Paul McKenney , David Airlie , Daniel Vetter , Ard Biesheuvel , Herbert Xu , Christoph Hellwig , Sebastian Andrzej Siewior , Ingo Molnar , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Daniel Bristot de Oliveira , Andrew Morton , linux-mm@kvack.org, x86@kernel.org, Vineet Gupta , linux-snps-arc@lists.infradead.org, Russell King , Arnd Bergmann , linux-arm-kernel@lists.infradead.org, Guo Ren , linux-csky@vger.kernel.org, Michal Simek , Thomas Bogendoerfer , linux-mips@vger.kernel.org, Nick Hu , Greentime Hu , Vincent Chen , Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , linuxppc-dev@lists.ozlabs.org, "David S. Miller" , sparclinux@vger.kernel.org, Chris Zankel , Max Filippov , linux-xtensa@linux-xtensa.org Subject: [patch V2 15/18] io-mapping: Cleanup atomic iomap References: <20201029221806.189523375@linutronix.de> MIME-Version: 1.0 Content-transfer-encoding: 8-bit Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org Switch the atomic iomap implementation over to kmap_local and stick the preempt/pagefault mechanics into the generic code similar to the kmap_atomic variants. Rename the x86 map function in preparation for a non-atomic variant. Signed-off-by: Thomas Gleixner --- V2: New patch to make review easier --- arch/x86/include/asm/iomap.h | 9 +-------- arch/x86/mm/iomap_32.c | 6 ++---- include/linux/io-mapping.h | 8 ++++++-- 3 files changed, 9 insertions(+), 14 deletions(-) --- a/arch/x86/include/asm/iomap.h +++ b/arch/x86/include/asm/iomap.h @@ -13,14 +13,7 @@ #include #include -void __iomem *iomap_atomic_pfn_prot(unsigned long pfn, pgprot_t prot); - -static inline void iounmap_atomic(void __iomem *vaddr) -{ - kunmap_local_indexed((void __force *)vaddr); - pagefault_enable(); - preempt_enable(); -} +void __iomem *__iomap_local_pfn_prot(unsigned long pfn, pgprot_t prot); int iomap_create_wc(resource_size_t base, unsigned long size, pgprot_t *prot); --- a/arch/x86/mm/iomap_32.c +++ b/arch/x86/mm/iomap_32.c @@ -44,7 +44,7 @@ void iomap_free(resource_size_t base, un } EXPORT_SYMBOL_GPL(iomap_free); -void __iomem *iomap_atomic_pfn_prot(unsigned long pfn, pgprot_t prot) +void __iomem *__iomap_local_pfn_prot(unsigned long pfn, pgprot_t prot) { /* * For non-PAT systems, translate non-WB request to UC- just in @@ -60,8 +60,6 @@ void __iomem *iomap_atomic_pfn_prot(unsi /* Filter out unsupported __PAGE_KERNEL* bits: */ pgprot_val(prot) &= __default_kernel_pte_mask; - preempt_disable(); - pagefault_disable(); return (void __force __iomem *)__kmap_local_pfn_prot(pfn, prot); } -EXPORT_SYMBOL_GPL(iomap_atomic_pfn_prot); +EXPORT_SYMBOL_GPL(__iomap_local_pfn_prot); --- a/include/linux/io-mapping.h +++ b/include/linux/io-mapping.h @@ -69,13 +69,17 @@ io_mapping_map_atomic_wc(struct io_mappi BUG_ON(offset >= mapping->size); phys_addr = mapping->base + offset; - return iomap_atomic_pfn_prot(PHYS_PFN(phys_addr), mapping->prot); + preempt_disable(); + pagefault_disable(); + return __iomap_local_pfn_prot(PHYS_PFN(phys_addr), mapping->prot); } static inline void io_mapping_unmap_atomic(void __iomem *vaddr) { - iounmap_atomic(vaddr); + kunmap_local_indexed((void __force *)vaddr); + pagefault_enable(); + preempt_enable(); } static inline void __iomem *