block/null_blk/trace.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 /*
0003  * null_blk trace related helpers.
0004  *
0005  * Copyright (C) 2020 Western Digital Corporation or its affiliates.
0006  */
0007 #include "trace.h"
0008
0009 /*
0010  * Helper to use for all null_blk traces to extract disk name.
0011  */
0012 const char *nullb_trace_disk_name(struct trace_seq *p, char *name)
0013 {
0014     const char *ret = trace_seq_buffer_ptr(p);
0015
0016     if (name && *name)
0017         trace_seq_printf(p, "disk=%s, ", name);
0018     trace_seq_putc(p, 0);
0019
0020     return ret;
0021 }