linux-user: Use safe_syscall wrapper for flock

Use the safe_syscall wrapper for the flock syscall.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 294e5ee..7d88009 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -722,6 +722,7 @@
               int, flags, struct sockaddr *, addr, socklen_t *, addrlen)
 safe_syscall3(ssize_t, sendmsg, int, fd, const struct msghdr *, msg, int, flags)
 safe_syscall3(ssize_t, recvmsg, int, fd, struct msghdr *, msg, int, flags)
+safe_syscall2(int, flock, int, fd, int, operation)
 #ifdef __NR_msgsnd
 safe_syscall4(int, msgsnd, int, msgid, const void *, msgp, size_t, sz,
               int, flags)
@@ -9025,7 +9026,7 @@
     case TARGET_NR_flock:
         /* NOTE: the flock constant seems to be the same for every
            Linux platform */
-        ret = get_errno(flock(arg1, arg2));
+        ret = get_errno(safe_flock(arg1, arg2));
         break;
     case TARGET_NR_readv:
         {