[PATCH 6/6] udf: use extent cache when moving to last extent

[Namjae Jeon]

From: Namjae Jeon <namjae.jeon@xxxxxxxxxxx>

Use extent cache when moving to last extent.

Signed-off-by: Namjae Jeon <namjae.jeon@xxxxxxxxxxx>
Signed-off-by: Ashish Sangwan <a.sangwan@xxxxxxxxxxx>
---
 fs/udf/truncate.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/fs/udf/truncate.c b/fs/udf/truncate.c
index 8a9657d..95fd9bf 100644
--- a/fs/udf/truncate.c
+++ b/fs/udf/truncate.c
@@ -88,6 +88,8 @@ void udf_truncate_tail_extent(struct inode *inode)
 		adsize = sizeof(struct long_ad);
 	else
 		BUG();
+	if (!udf_read_extent_cache(inode, inode->i_size, &lbcount, &epos))
+		epos.block = iinfo->i_location;
 
 	/* Find the last extent in the file */
 	while ((netype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) {
@@ -139,8 +141,8 @@ void udf_discard_prealloc(struct inode *inode)
 		adsize = sizeof(struct long_ad);
 	else
 		adsize = 0;
-
-	epos.block = iinfo->i_location;
+	if (!udf_read_extent_cache(inode, inode->i_size, &lbcount, &epos))
+		epos.block = iinfo->i_location;
 
 	/* Find the last extent in the file */
 	while ((netype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) {
-- 
1.7.9.5

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