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<base href="https://bugs.dpdk.org/">
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<body><table border="1" cellspacing="0" cellpadding="8" class="bz_new_table">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_UNCONFIRMED "
title="UNCONFIRMED - net/thunderx: warning with Gcc 15"
href="https://bugs.dpdk.org/show_bug.cgi?id=1613">1613</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>net/thunderx: warning with Gcc 15
</td>
</tr>
<tr>
<th>Product</th>
<td>DPDK
</td>
</tr>
<tr>
<th>Version</th>
<td>25.03
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>UNCONFIRMED
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>Normal
</td>
</tr>
<tr>
<th>Component</th>
<td>ethdev
</td>
</tr>
<tr>
<th>Assignee</th>
<td>dev@dpdk.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>stephen@networkplumber.org
</td>
</tr>
<tr>
<th>Target Milestone</th>
<td>---
</td>
</tr></table>
<p>
<div class="bz_comment_block">
<pre class="bz_comment_text">Gcc 15 has changed how unions are initialized and now this driver gets an
uninitialized variable warning.
Reported as Gcc bug. <a href="https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118403">https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118403</a>
Simple fix is to change to empty initializer.
2377/3224] Compiling C object
drivers/net/thunderx/base/libnicvf_base.a.p/nicvf_mbox.c.o
In function ‘nicvf_mbox_send_msg_to_pf_raw’,
inlined from ‘nicvf_mbox_send_async_msg_to_pf’ at
../drivers/net/thunderx/base/nicvf_mbox.c:70:2,
inlined from ‘nicvf_mbox_cfg_done’ at
../drivers/net/thunderx/base/nicvf_mbox.c:468:2:
../drivers/net/thunderx/base/nicvf_mbox.c:59:17: warning: ‘mbx’ is used
uninitialized [-Wuninitialized]
59 | nicvf_reg_write(nic, mbx_addr, *mbx_data);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../drivers/net/thunderx/base/nicvf_mbox.c: In function ‘nicvf_mbox_cfg_done’:
../drivers/net/thunderx/base/nicvf_mbox.c:465:24: note: ‘mbx’ declared here
465 | struct nic_mbx mbx = { .msg = { 0 } };
| ^~~
In function ‘nicvf_mbox_send_msg_to_pf_raw’,
inlined from ‘nicvf_mbox_send_async_msg_to_pf’ at
../drivers/net/thunderx/base/nicvf_mbox.c:70:2,
inlined from ‘nicvf_mbox_link_change’ at
../drivers/net/thunderx/base/nicvf_mbox.c:477:2:
../drivers/net/thunderx/base/nicvf_mbox.c:59:17: warning: ‘mbx’ is used
uninitialized [-Wuninitialized]
59 | nicvf_reg_write(nic, mbx_addr, *mbx_data);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../drivers/net/thunderx/base/nicvf_mbox.c: In function
‘nicvf_mbox_link_change’:
../drivers/net/thunderx/base/nicvf_mbox.c:474:24: note: ‘mbx’ declared here
474 | struct nic_mbx mbx = { .msg = { 0 } };
</pre>
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