If rounded block-rounded i_lenExtents matches block rounded i_size, there are no preallocation extents. Do not bother walking extent linked list.

CC: stable@vger.kernel.org Signed-off-by: Jan Kara jack@suse.cz --- fs/udf/truncate.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/udf/truncate.c b/fs/udf/truncate.c index a9790fb32f5f..036ebd892b85 100644 --- a/fs/udf/truncate.c +++ b/fs/udf/truncate.c @@ -127,9 +127,10 @@ void udf_discard_prealloc(struct inode *inode) uint64_t lbcount = 0; int8_t etype = -1, netype; struct udf_inode_info *iinfo = UDF_I(inode); + int bsize = 1 << inode->i_blkbits;

if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB || - inode->i_size == iinfo->i_lenExtents) + ALIGN(inode->i_size, bsize) == ALIGN(iinfo->i_lenExtents, bsize)) return;

epos.block = iinfo->i_location;