From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg0-f72.google.com (mail-pg0-f72.google.com [74.125.83.72]) by kanga.kvack.org (Postfix) with ESMTP id F1F216B028A for ; Tue, 5 Dec 2017 19:42:16 -0500 (EST) Received: by mail-pg0-f72.google.com with SMTP id i14so1500249pgf.13 for ; Tue, 05 Dec 2017 16:42:16 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org. [65.50.211.133]) by mx.google.com with ESMTPS id b73si912130pli.441.2017.12.05.16.42.15 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 05 Dec 2017 16:42:15 -0800 (PST) From: Matthew Wilcox Subject: [PATCH v4 65/73] dax: Fix sparse warning Date: Tue, 5 Dec 2017 16:41:51 -0800 Message-Id: <20171206004159.3755-66-willy@infradead.org> In-Reply-To: <20171206004159.3755-1-willy@infradead.org> References: <20171206004159.3755-1-willy@infradead.org> Sender: owner-linux-mm@kvack.org List-ID: Cc: Matthew Wilcox , Ross Zwisler , Jens Axboe , Rehas Sachdeva , linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-xfs@vger.kernel.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org From: Matthew Wilcox sparse doesn't know that follow_pte_pmd conditionally acquires the ptl, so add an annotation to let it know what's going on. Signed-off-by: Matthew Wilcox --- fs/dax.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/dax.c b/fs/dax.c index c663d82e8ba3..7a86ff1153dd 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -531,6 +531,7 @@ static void dax_mapping_entry_mkclean(struct address_space *mapping, */ if (follow_pte_pmd(vma->vm_mm, address, &start, &end, &ptep, &pmdp, &ptl)) continue; + __acquire(ptl); /* Conditionally acquired above */ /* * No need to call mmu_notifier_invalidate_range() as we are -- 2.15.0 -- 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