5. Handling of the file structures is special. Since the look-up
of the fd (fget()/fget_light()) are lock-free, it is possible
that look-up may race with the last put() operation on the
- file structure. This is avoided using atomic_inc_not_zero()
+ file structure. This is avoided using atomic_long_inc_not_zero()
on ->f_count :
rcu_read_lock();
file = fcheck_files(files, fd);
if (file) {
- if (atomic_inc_not_zero(&file->f_count))
+ if (atomic_long_inc_not_zero(&file->f_count))
*fput_needed = 1;
else
/* Didn't get the reference, someone's freed */
....
return file;
- atomic_inc_not_zero() detects if refcounts is already zero or
+ atomic_long_inc_not_zero() detects if refcounts is already zero or
goes to zero during increment. If it does, we fail
fget()/fget_light().
if (fd >= 0) {
/* locate_fd() may have expanded fdtable, load the ptr */
fdt = files_fdtable(files);
- FD_SET(fd, fdt->open_fds);
- FD_CLR(fd, fdt->close_on_exec);
+ __set_open_fd(fd, fdt);
+ __clear_close_on_exec(fd, fdt);
spin_unlock(&files->file_lock);
.....