X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=fs%2Fdax.c;h=4ab1c493c73f1edd965d73dbafefa25433233552;hb=b02a025dd188915f1d4754e28b3ea021ac607186;hp=4e3e5a283a916a43e2abf7b969307b582ee3ceb6;hpb=75b96f0ec5faf730128c32187e3e28441c27a094;p=platform%2Fkernel%2Flinux-rpi.git

diff --git a/fs/dax.c b/fs/dax.c
index 4e3e5a2..4ab1c49 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -846,7 +846,8 @@ static void dax_entry_mkclean(struct address_space *mapping, pgoff_t index,
 			if (!pmd_dirty(*pmdp) && !pmd_write(*pmdp))
 				goto unlock_pmd;
 
-			flush_cache_page(vma, address, pfn);
+			flush_cache_range(vma, address,
+					  address + HPAGE_PMD_SIZE);
 			pmd = pmdp_invalidate(vma, address, pmdp);
 			pmd = pmd_wrprotect(pmd);
 			pmd = pmd_mkclean(pmd);
@@ -1278,6 +1279,9 @@ dax_iomap_rw(struct kiocb *iocb, struct iov_iter *iter,
 	loff_t done = 0;
 	int ret;
 
+	if (!iomi.len)
+		return 0;
+
 	if (iov_iter_rw(iter) == WRITE) {
 		lockdep_assert_held_write(&iomi.inode->i_rwsem);
 		iomi.flags |= IOMAP_WRITE;