struct lib_ring_buffer *buf = inode->i_private;
int ret;
+ if (!buf)
+ return -EINVAL;
+
ret = lib_ring_buffer_open_read(buf);
if (ret)
return ret;
return put_ulong(buf->backend.array[sb_bindex]->mmap_offset,
arg);
}
+ case RING_BUFFER_FLUSH:
+ lib_ring_buffer_switch_slow(buf, SWITCH_ACTIVE);
+ return 0;
default:
return -ENOIOCTLCMD;
}
return -EINVAL;
return put_ulong(read_offset, arg);
}
+ case RING_BUFFER_FLUSH:
+ lib_ring_buffer_switch_slow(buf, SWITCH_ACTIVE);
+ return 0;
default:
return -ENOIOCTLCMD;
}
#endif
const struct file_operations lib_ring_buffer_file_operations = {
+ .owner = THIS_MODULE,
.open = lib_ring_buffer_open,
.release = lib_ring_buffer_release,
.poll = lib_ring_buffer_poll,