static ssize_t ulong_write_file(struct file *file, char const __user *buf, size_t count, loff_t *offset) { unsigned long value; int retval; if (*offset) return -EINVAL; retval = oprofilefs_ulong_from_user(&value, buf, count); if (retval <= 0) return retval; retval = oprofile_set_ulong(file->private_data, value); if (retval) return retval; return count; }
ssize_t ca_css_tgid_write(struct file * file, char const __user * buf, size_t count, loff_t * offset) { unsigned long val; int retval; if (*offset) return -EINVAL; if (!oprofile_ops.ca_css) return -EINVAL; retval = oprofilefs_ulong_from_user(&val, buf, count); if (retval) return retval; retval = oprofile_set_ulong(&ca_css_tgid, val); if (retval) return retval; return count; }
static ssize_t depth_write(struct file *file, char const __user *buf, size_t count, loff_t *offset) { unsigned long val; int retval; if (*offset) return -EINVAL; if (!oprofile_ops.backtrace) return -EINVAL; retval = oprofilefs_ulong_from_user(&val, buf, count); if (retval) return retval; retval = oprofile_set_ulong(&oprofile_backtrace_depth, val); if (retval) return retval; return count; }