}
EXPORT_SYMBOL(vfs_llseek);
-/*
- * We only lock f_pos if we have threads or if the file might be
- * shared with another process. In both cases we'll have an elevated
- * file count (done either by fdget() or by fork()).
- */
static inline struct fd fdget_pos(int fd)
{
- struct fd f = fdget(fd);
- struct file *file = f.file;
-
- if (file && (file->f_mode & FMODE_ATOMIC_POS)) {
- if (file_count(file) > 1) {
- f.flags |= FDPUT_POS_UNLOCK;
- mutex_lock(&file->f_pos_lock);
- }
- }
- return f;
+ return __to_fd(__fdget_pos(fd));
}
static inline void fdput_pos(struct fd f)
unsigned int, whence)
{
int retval;
- struct fd f = fdget(fd);
+ struct fd f = fdget_pos(fd);
loff_t offset;
if (!f.file)
retval = 0;
}
out_putf:
- fdput(f);
+ fdput_pos(f);
return retval;
}
#endif