-/**
- * ll_stats_pid_write() - Determine if stats collection should be enabled
- * @buf: Buffer containing the data written
- * @len: Number of bytes in the buffer
- *
- * Several proc files begin collecting stats when a value is written, and stop
- * collecting when either '0' or 'disable' is written. This function checks the
- * written value to see if collection should be enabled or disabled.
- *
- * Return: If '0' or 'disable' is provided, 0 is returned. If the text
- * equivalent of a number is written, that number is returned. Otherwise,
- * 1 is returned. Non-zero return values indicate collection should be enabled.
- */
-static __s64 ll_stats_pid_write(const char __user *buf, size_t len)
-{
- unsigned long long value = 1;
- int rc;
- char kernbuf[16];
-
- rc = kstrtoull_from_user(buf, len, 0, &value);
- if (rc < 0 && len < sizeof(kernbuf)) {
-
- if (copy_from_user(kernbuf, buf, len))
- return -EFAULT;
- kernbuf[len] = 0;
-
- if (kernbuf[len - 1] == '\n')
- kernbuf[len - 1] = 0;
-
- if (strncasecmp(kernbuf, "disable", 7) == 0)
- value = 0;
- }
-
- return value;
-}
-
-LPROC_SEQ_FOPS(ll_rw_offset_stats);
-#endif /* CONFIG_PROC_FS */