[PATCH rt-tests v3 1/1] rt-numa: Use sched_getaffinity() instead of pthread_getaffinity_np()

[Daniel Wagner <dwagner@suse.de>]

pthread_getaffinity_np() prevents static builds as glibc does not
expose it for this configuration. Instead use sched_getaffinity()
directly as pthread_getaffinity_np() is just a fancy glibc wrapper
around sched_getaffinity().

Static builds helps in in situation where the rootfs is minimal
and does for example not ship libnuma.

The pthread_getaffinity_np call was introduced by commit
f240656b056b ("rt-tests: cyclictest: Fix -t without a user specified
[NUM]")

Signed-off-by: Daniel Wagner <dwagner@suse.de>
---
 src/lib/rt-numa.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/src/lib/rt-numa.c b/src/lib/rt-numa.c
index babcc634d57e..bb0121a65eca 100644
--- a/src/lib/rt-numa.c
+++ b/src/lib/rt-numa.c
@@ -68,15 +68,13 @@ int cpu_for_thread_sp(int thread_num, int max_cpus, struct bitmask *cpumask)
 int cpu_for_thread_ua(int thread_num, int max_cpus)
 {
 	int res, num_cpus, i, m, cpu;
-	pthread_t thread;
 	cpu_set_t cpuset;
 
-	thread = pthread_self();
 	CPU_ZERO(&cpuset);
 
-	res = pthread_getaffinity_np(thread, sizeof(cpu_set_t), &cpuset);
+	res = sched_getaffinity(0, sizeof(cpu_set_t), &cpuset);
 	if (res != 0)
-		fatal("pthread_getaffinity_np failed: %s\n", strerror(res));
+		fatal("sched_getaffinity failed: %s\n", strerror(res));
 
 	num_cpus = CPU_COUNT(&cpuset);
 	m = thread_num % num_cpus;
-- 
2.32.0