gettid() is 10% lighter than getppid(), use it for null_syscall selftest.

Signed-off-by: Christophe Leroy christophe.leroy@csgroup.eu --- tools/testing/selftests/powerpc/benchmarks/null_syscall.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/powerpc/benchmarks/null_syscall.c b/tools/testing/selftests/powerpc/benchmarks/null_syscall.c index 579f0215c6e7..9836838a529f 100644 --- a/tools/testing/selftests/powerpc/benchmarks/null_syscall.c +++ b/tools/testing/selftests/powerpc/benchmarks/null_syscall.c @@ -14,6 +14,7 @@ #include <time.h> #include <sys/types.h> #include <sys/time.h> +#include <sys/syscall.h> #include <signal.h>

static volatile int soak_done; @@ -121,7 +122,7 @@ static void do_null_syscall(unsigned long nr) unsigned long i;

for (i = 0; i < nr; i++) - getppid(); + syscall(__NR_gettid); }

#define TIME(A, STR) \