From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752737AbeCMN0t (ORCPT ); Tue, 13 Mar 2018 09:26:49 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:34966 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751852AbeCMN0n (ORCPT ); Tue, 13 Mar 2018 09:26:43 -0400 From: Matthew Wilcox To: Andrew Morton Cc: Matthew Wilcox , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, Ryusuke Konishi , linux-nilfs@vger.kernel.org Subject: [PATCH v9 04/61] unicore32: Turn flush_dcache_mmap_lock into a no-op Date: Tue, 13 Mar 2018 06:25:42 -0700 Message-Id: <20180313132639.17387-5-willy@infradead.org> X-Mailer: git-send-email 2.14.3 In-Reply-To: <20180313132639.17387-1-willy@infradead.org> References: <20180313132639.17387-1-willy@infradead.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Matthew Wilcox Unicore doesn't walk the VMA tree in its flush_dcache_page() implementation, so has no need to take the tree_lock. Signed-off-by: Matthew Wilcox --- arch/unicore32/include/asm/cacheflush.h | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/arch/unicore32/include/asm/cacheflush.h b/arch/unicore32/include/asm/cacheflush.h index a5e08e2d5d6d..1d9132b66039 100644 --- a/arch/unicore32/include/asm/cacheflush.h +++ b/arch/unicore32/include/asm/cacheflush.h @@ -170,10 +170,8 @@ extern void flush_cache_page(struct vm_area_struct *vma, #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1 extern void flush_dcache_page(struct page *); -#define flush_dcache_mmap_lock(mapping) \ - spin_lock_irq(&(mapping)->tree_lock) -#define flush_dcache_mmap_unlock(mapping) \ - spin_unlock_irq(&(mapping)->tree_lock) +#define flush_dcache_mmap_lock(mapping) do { } while (0) +#define flush_dcache_mmap_unlock(mapping) do { } while (0) #define flush_icache_user_range(vma, page, addr, len) \ flush_dcache_page(page) -- 2.16.1