From patchwork Tue Nov 3 09:27:31 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 11876919 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 2A8CC6A2 for ; Tue, 3 Nov 2020 10:36:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 05FBD2242A for ; Tue, 3 Nov 2020 10:36:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="4QvDGqKV"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="nHEOgyol" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728371AbgKCKgC (ORCPT ); Tue, 3 Nov 2020 05:36:02 -0500 Received: from Galois.linutronix.de ([193.142.43.55]:39008 "EHLO galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728429AbgKCKdv (ORCPT ); Tue, 3 Nov 2020 05:33:51 -0500 Message-Id: <20201103095858.516281567@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1604399626; 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=dYx1Yl6wgjFDzL4d7wpy+MQ/ca4VbI4dshzY4C94zCg=; b=4QvDGqKVKPFjYTZiH7xhv8zBsxgNw5ucuOWpbKZ18rMtaNCpT4m1fIgg7d42Pf4ttY8gnQ j6STlpHNZtb54KQolCEvAOtfIBn6Zvac5eoLzhR1q+EBZQKhuxC69WReFFoUfX3tPRPCts 2HTD6Fl5QJuJ5QyiXhkDQiJfASqZgrTfuQJiZK0MqskHi6zDD6EHlpfZpwHaxGhXXwPr9X Vb4k2kb3SczzsSlpmpaZ3L8Dy/cZbHaEz0VgKRZkMQL3dGerZvWCuwHHNLPkfinWQIFB0j gsmyZDxZFqomNDAg2jzR8z96x8DEnYsbXhV7JtsOk/xYyutDKygozbXhq2uhKw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1604399626; 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=dYx1Yl6wgjFDzL4d7wpy+MQ/ca4VbI4dshzY4C94zCg=; b=nHEOgyol8j2FfkUQAHNBZiJ0Vnv+JbHd05D8vSpMEVgHoPEClg1kXmC2+PGwuxytijKdb7 OO86HAY7UU5tfdBw== Date: Tue, 03 Nov 2020 10:27:31 +0100 From: Thomas Gleixner To: LKML Cc: Linus Torvalds , Peter Zijlstra , Paul McKenney , Christoph Hellwig , Sebastian Andrzej Siewior , Andrew Morton , linux-mm@kvack.org, Alexander Viro , Benjamin LaHaise , linux-fsdevel@vger.kernel.org, linux-aio@kvack.org, Chris Mason , Josef Bacik , David Sterba , linux-btrfs@vger.kernel.org, x86@kernel.org, Vineet Gupta , linux-snps-arc@lists.infradead.org, Russell King , Arnd Bergmann , linux-arm-kernel@lists.infradead.org, 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, Ingo Molnar , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Daniel Bristot de Oliveira , Christian Koenig , Huang Rui , David Airlie , Daniel Vetter , dri-devel@lists.freedesktop.org, VMware Graphics , Roland Scheidegger , Dave Airlie , Gerd Hoffmann , virtualization@lists.linux-foundation.org, spice-devel@lists.freedesktop.org, Ben Skeggs , nouveau@lists.freedesktop.org, Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , intel-gfx@lists.freedesktop.org Subject: [patch V3 19/37] mm/highmem: Remove the old kmap_atomic cruft References: <20201103092712.714480842@linutronix.de> MIME-Version: 1.0 Content-transfer-encoding: 8-bit Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org All users gone. Signed-off-by: Thomas Gleixner --- include/linux/highmem.h | 63 +++--------------------------------------------- mm/highmem.c | 7 ----- 2 files changed, 5 insertions(+), 65 deletions(-) --- a/include/linux/highmem.h +++ b/include/linux/highmem.h @@ -86,31 +86,16 @@ static inline void kunmap(struct page *p * be used in IRQ contexts, so in some (very limited) cases we need * it. */ - -#ifndef CONFIG_KMAP_LOCAL -void *kmap_atomic_high_prot(struct page *page, pgprot_t prot); -void kunmap_atomic_high(void *kvaddr); - static inline void *kmap_atomic_prot(struct page *page, pgprot_t prot) { preempt_disable(); pagefault_disable(); - if (!PageHighMem(page)) - return page_address(page); - return kmap_atomic_high_prot(page, prot); -} - -static inline void __kunmap_atomic(void *vaddr) -{ - kunmap_atomic_high(vaddr); + return __kmap_local_page_prot(page, prot); } -#else /* !CONFIG_KMAP_LOCAL */ -static inline void *kmap_atomic_prot(struct page *page, pgprot_t prot) +static inline void *kmap_atomic(struct page *page) { - preempt_disable(); - pagefault_disable(); - return __kmap_local_page_prot(page, prot); + return kmap_atomic_prot(page, kmap_prot); } static inline void *kmap_atomic_pfn(unsigned long pfn) @@ -125,13 +110,6 @@ static inline void __kunmap_atomic(void kunmap_local_indexed(addr); } -#endif /* CONFIG_KMAP_LOCAL */ - -static inline void *kmap_atomic(struct page *page) -{ - return kmap_atomic_prot(page, kmap_prot); -} - /* declarations for linux/mm/highmem.c */ unsigned int nr_free_highpages(void); extern atomic_long_t _totalhigh_pages; @@ -212,41 +190,8 @@ static inline void __kunmap_atomic(void #define kmap_flush_unused() do {} while(0) -#endif /* CONFIG_HIGHMEM */ - -#if !defined(CONFIG_KMAP_LOCAL) -#if defined(CONFIG_HIGHMEM) - -DECLARE_PER_CPU(int, __kmap_atomic_idx); - -static inline int kmap_atomic_idx_push(void) -{ - int idx = __this_cpu_inc_return(__kmap_atomic_idx) - 1; - -#ifdef CONFIG_DEBUG_HIGHMEM - WARN_ON_ONCE(in_irq() && !irqs_disabled()); - BUG_ON(idx >= KM_TYPE_NR); -#endif - return idx; -} - -static inline int kmap_atomic_idx(void) -{ - return __this_cpu_read(__kmap_atomic_idx) - 1; -} -static inline void kmap_atomic_idx_pop(void) -{ -#ifdef CONFIG_DEBUG_HIGHMEM - int idx = __this_cpu_dec_return(__kmap_atomic_idx); - - BUG_ON(idx < 0); -#else - __this_cpu_dec(__kmap_atomic_idx); -#endif -} -#endif -#endif +#endif /* CONFIG_HIGHMEM */ /* * Prevent people trying to call kunmap_atomic() as if it were kunmap() --- a/mm/highmem.c +++ b/mm/highmem.c @@ -31,12 +31,6 @@ #include #include -#ifndef CONFIG_KMAP_LOCAL -#ifdef CONFIG_HIGHMEM -DEFINE_PER_CPU(int, __kmap_atomic_idx); -#endif -#endif - /* * Virtual_count is not a pure "count". * 0 means that it is not mapped, and has not been mapped @@ -410,6 +404,7 @@ static inline void kmap_local_idx_pop(vo #ifndef arch_kmap_local_post_map # define arch_kmap_local_post_map(vaddr, pteval) do { } while (0) #endif + #ifndef arch_kmap_local_pre_unmap # define arch_kmap_local_pre_unmap(vaddr) do { } while (0) #endif