[PATCH 21.11] examples/performance-thread: fix build with GCC 12
Kevin Traynor
ktraynor at redhat.com
Wed Aug 24 11:58:16 CEST 2022
[1/2] Compiling C object examples/dpdk-pthrea...
formance-thread_pthread_shim_pthread_shim.c.o
../examples/performance-thread/pthread_shim/pthread_shim.c:
In function ‘pthread_setspecific’:
../examples/performance-thread/pthread_shim/pthread_shim.c:592:27:
warning: ‘data’ may be used uninitialized [-Wmaybe-uninitialized]
592 | int rv = lthread_setspecific((unsigned int)key, data);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../examples/performance-thread/pthread_shim/pthread_shim.c:589:56:
note: accessing argument 2 of a function declared with attribute
‘access (none, 2)’
589 | int pthread_setspecific(pthread_key_t key, const void *data)
| ~~~~~~~~~~~~^~~~
This is a false positive as pthread_setspecific() does not read from
the (const void *) so we can squash the warning.
performance-thread example is already removed from DPDK main branch.
Signed-off-by: Kevin Traynor <ktraynor at redhat.com>
---
examples/performance-thread/pthread_shim/pthread_shim.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/examples/performance-thread/pthread_shim/pthread_shim.c b/examples/performance-thread/pthread_shim/pthread_shim.c
index bbc076584b..a44cb8244d 100644
--- a/examples/performance-thread/pthread_shim/pthread_shim.c
+++ b/examples/performance-thread/pthread_shim/pthread_shim.c
@@ -587,4 +587,9 @@ pthread_t pthread_self(void)
}
+#if defined(RTE_TOOLCHAIN_GCC) && (GCC_VERSION >= 120000)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
+#endif
+
int pthread_setspecific(pthread_key_t key, const void *data)
{
@@ -596,4 +601,8 @@ int pthread_setspecific(pthread_key_t key, const void *data)
}
+#if defined(RTE_TOOLCHAIN_GCC) && (GCC_VERSION >= 120000)
+#pragma GCC diagnostic pop
+#endif
+
int pthread_spin_init(pthread_spinlock_t *a, int b)
{
--
2.37.2
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