[LTP] [PATCH v2 2/2] syscalls/getcpu:Add libc sched_getcpu() detection &&fix compiler errors

[Yang Xu]

sched_getcpu() isn't defined on some old distros, so we can add dection
and fix compiler error.

Signed-off-by: Yang Xu <xuyang2018.jy@cn.fujitsu.com>
---
 configure.ac                                | 1 +
 testcases/kernel/syscalls/getcpu/getcpu01.c | 5 +++--
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index fad8f8396..53ad784d7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -77,6 +77,7 @@ AC_CHECK_FUNCS([ \
     readlinkat \
     renameat \
     renameat2 \
+    sched_getcpu \
     sigpending \
     splice \
     stime \
diff --git a/testcases/kernel/syscalls/getcpu/getcpu01.c b/testcases/kernel/syscalls/getcpu/getcpu01.c
index eb6ded8ab..fcc273e29 100644
--- a/testcases/kernel/syscalls/getcpu/getcpu01.c
+++ b/testcases/kernel/syscalls/getcpu/getcpu01.c
@@ -18,13 +18,14 @@
 #include "lapi/syscalls.h"
 #include "lapi/cpuset.h"
 #include "tst_test.h"
+#include "config.h"
 
 static inline int get_cpu(unsigned *cpu_id,
 			  unsigned *node_id LTP_ATTRIBUTE_UNUSED,
 			  void *cache_struct LTP_ATTRIBUTE_UNUSED)
 {
-#if defined(__i386__)
-	return syscall(__NR_getcpu, cpu_id, node_id, cache_struct);
+#ifndef HAVE_SCHED_GETCPU
+	return tst_syscall(__NR_getcpu, cpu_id, node_id, cache_struct);
 #else
 	*cpu_id = sched_getcpu();
 #endif
-- 
2.18.1