missing-syscall: fix copypasta

As noticed by @mbiebl:

https://github.com/systemd/systemd/commit/5134e18eedc30bfe5397ed31f94903d984a60cfc#r43033443
(cherry picked from commit ba28df775d451edfcca9f996d60ed34c1dde2ac5)

diff --git a/src/basic/missing_syscall.h b/src/basic/missing_syscall.h
index 53c549d20c8c50407a62d25bd49bdbb7667dac8b..6b0a6cb21563b2baf897f829329187456497e01c 100644 (file)
--- a/src/basic/missing_syscall.h
+++ b/src/basic/missing_syscall.h
@@ -555,7 +555,7 @@ static inline long missing_get_mempolicy(int *mode, unsigned long *nodemask,
 #    endif
 #  endif
 static inline int missing_pidfd_send_signal(int fd, int sig, siginfo_t *info, unsigned flags) {
-#  ifdef __NR_pidfd_open
+#  ifdef __NR_pidfd_send_signal
         return syscall(__NR_pidfd_send_signal, fd, sig, info, flags);
 #  else
         errno = ENOSYS;