From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Wilcox 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> References: <20180313132639.17387-1-willy@infradead.org> Return-path: DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=LNdl9xwnGce9andWyEPDDsS6Pi2hPfcZinV72VWZDgg=; b=ult0rLA8mmT2Q0/LZOlalJd70 MMuaadqCzMjmczmozVt9WVXnsogKgrJdN4a3jnvemAY+lQxm2BuJpAcZxr55sEa59KSdZhYsNMygM aDC2HyfzKC1WtvPCaISqjicJ/R9vCje1wo+TinOLYV1JkAB7j0sEoqWNWwgUUTpJcm9d5aGY+4GXP 1kNPPASJ89/7kjjtq1qiGpSWm8eDQ/MV3FpNUF3AV66e50qc5Uvn/o5yRjyh9RgM8RPXupWDW41oH kY7Q/zvI44f5PwZ8ZFBwzi8nIXIBUAb8Ojycx0YA7976uEnLBm5OUJr1QeTcO5OvNiYMv7bmHKTZq In-Reply-To: <20180313132639.17387-1-willy@infradead.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit 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 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