[PATCH v5 66/78] dax: Fix sparse warning
From: Matthew Wilcox <willy@infradead.org>
Date: 2017-12-15 22:04:38
Also in:
linux-f2fs-devel, linux-fsdevel, linux-mm, linux-usb, linux-xfs, lkml
Subsystem:
filesystem direct access (dax), filesystems (vfs and infrastructure), the rest · Maintainers:
Dan Williams, Alexander Viro, Christian Brauner, Linus Torvalds
From: Matthew Wilcox <redacted> 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 <redacted> --- fs/dax.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/fs/dax.c b/fs/dax.c
index f591ab5be590..6ef727af30f0 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
--
2.15.1
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