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Message-Id: <20171206004159.3755-66-willy@infradead.org> Date: Tue, 5 Dec 2017 16:41:51 -0800 From: Matthew Wilcox <willy@...radead.org> To: unlisted-recipients:; (no To-header on input) Cc: Matthew Wilcox <mawilcox@...rosoft.com>, Ross Zwisler <ross.zwisler@...ux.intel.com>, Jens Axboe <axboe@...nel.dk>, Rehas Sachdeva <aquannie@...il.com>, linux-mm@...ck.org, linux-fsdevel@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net, linux-nilfs@...r.kernel.org, linux-btrfs@...r.kernel.org, linux-xfs@...r.kernel.org, linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH v4 65/73] dax: Fix sparse warning From: Matthew Wilcox <mawilcox@...rosoft.com> 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 <mawilcox@...rosoft.com> --- 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
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