Hi Lukas,
FYI, there are new smatch warnings show up in
tree: git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git test
head: ac15e0ef8030228b98ee2dd4322510e5987fceae
commit: 99950cfa591ea073c85798191a1701025e4c65ce [39/40] ext4: Introduce
FALLOC_FL_ZERO_RANGE flag for fallocate
New smatch warnings:
fs/ext4/extents.c:3647 ext4_split_convert_extents() warn: suspicious bitop
condition
fs/ext4/extents.c:3650 ext4_split_convert_extents() warn: suspicious bitop
condition
Old smatch warnings:
fs/ext4/extents.c:5296 ext4_ext_shift_extents() error: 'path' dereferencing
possible ERR_PTR()
git remote add ext4 git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git
git remote update ext4
git checkout 99950cfa591ea073c85798191a1701025e4c65ce
vim +3647 fs/ext4/extents.c
667eff35 Yongqiang Yang 2011-05-03 3641 depth = ext_depth(inode);
667eff35 Yongqiang Yang 2011-05-03 3642 ex = path[depth].p_ext;
667eff35 Yongqiang Yang 2011-05-03 3643 ee_block =
le32_to_cpu(ex->ee_block);
667eff35 Yongqiang Yang 2011-05-03 3644 ee_len =
ext4_ext_get_actual_len(ex);
0031462b Mingming Cao 2009-09-28 3645
99950cfa Lukas Czerner 2014-03-16 3646 /* Convert to unwritten */
99950cfa Lukas Czerner 2014-03-16 @3647 if (flags |
EXT4_GET_BLOCKS_CONVERT_UNWRITTEN) {
99950cfa Lukas Czerner 2014-03-16 3648 split_flag |=
EXT4_EXT_DATA_VALID1;
99950cfa Lukas Czerner 2014-03-16 3649 /* Convert to initialized */
99950cfa Lukas Czerner 2014-03-16 @3650 } else if (flags |
EXT4_GET_BLOCKS_CONVERT) {
99950cfa Lukas Czerner 2014-03-16 3651 split_flag |= ee_block
+ ee_len <= eof_block ?
99950cfa Lukas Czerner 2014-03-16 3652
EXT4_EXT_MAY_ZEROOUT : 0;
99950cfa Lukas Czerner 2014-03-16 3653 split_flag |=
(EXT4_EXT_MARK_UNINIT2 & EXT4_EXT_DATA_VALID2);
---
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