From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pl0-f71.google.com (mail-pl0-f71.google.com [209.85.160.71]) by kanga.kvack.org (Postfix) with ESMTP id 619E16B0055 for ; Mon, 19 Feb 2018 14:46:07 -0500 (EST) Received: by mail-pl0-f71.google.com with SMTP id x2so6693399plv.16 for ; Mon, 19 Feb 2018 11:46:07 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org. [2607:7c80:54:e::133]) by mx.google.com with ESMTPS id d2si5764178pgo.342.2018.02.19.11.46.06 for (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Mon, 19 Feb 2018 11:46:06 -0800 (PST) From: Matthew Wilcox Subject: [PATCH v7 03/61] arm64: Turn flush_dcache_mmap_lock into a no-op Date: Mon, 19 Feb 2018 11:44:58 -0800 Message-Id: <20180219194556.6575-4-willy@infradead.org> In-Reply-To: <20180219194556.6575-1-willy@infradead.org> References: <20180219194556.6575-1-willy@infradead.org> Sender: owner-linux-mm@kvack.org List-ID: To: Andrew Morton Cc: Matthew Wilcox , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org From: Matthew Wilcox ARM64 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 Reviewed-by: Will Deacon --- arch/arm64/include/asm/cacheflush.h | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/arch/arm64/include/asm/cacheflush.h b/arch/arm64/include/asm/cacheflush.h index bef9f418f089..550b0abea953 100644 --- a/arch/arm64/include/asm/cacheflush.h +++ b/arch/arm64/include/asm/cacheflush.h @@ -137,10 +137,8 @@ static inline void __flush_icache_all(void) dsb(ish); } -#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) /* * We don't appear to need to do anything here. In fact, if we did, we'd -- 2.16.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org