When the {cpuacct/memory/blkio}.sli.monitor file is opened in rw mode, the
inode->i_readcount will not be increased. However, sli_monitor_open
will force change f_mode to FMODE_READ, this will lead to a crash when
trying to decrease the i_readcount in put_file_access. This problem is
caused by d6da19c9ca ("locks: fix TOCTOU race when granting write lease")
moving i_readcount_inc before open.
This commit fixes the bug by deleting the operation that forces the f_mode
to be changed to FMODE_READ in sli_monitor_open.
Signed-off-by: yilingjin <yilingjin@tencent.com>
Reviewed-by: Hui Li <caelli@tencent.com>
918a511742