ext4: Use bitops to read/modify i_flags in struct ext4_inode_info
At several places we modify EXT4_I(inode)->i_flags without holding
i_mutex (ext4_do_update_inode, ...). These modifications are racy and
we can lose updates to i_flags. So convert handling of i_flags to use
bitops which are atomic.
https://bugzilla.kernel.org/show_bug.cgi?id=15792
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 2e8790e..9766b2a 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -4148,6 +4148,7 @@
{
int err;
+ ext4_check_flag_values();
err = init_ext4_system_zone();
if (err)
return err;