The argument actually used inside send_rpc is argptr, not arg.
---
sysdeps/mach/hurd/ioctl.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/sysdeps/mach/hurd/ioctl.c b/sysdeps/mach/hurd/ioctl.c
index 0d5bc176d1..ed5de1332f 100644
--- a/sysdeps/mach/hurd/ioctl.c
+++ b/sysdeps/mach/hurd/ioctl.c
@@ -115,8 +115,8 @@ __ioctl (int fd, unsigned long int request, ...)
void *argptr = arg;
int zero = 0;
- if (request == TIOCFLUSH && !arg)
- arg = &zero;
+ if (request == TIOCFLUSH && !argptr)
+ argptr = &zero;
/* Pack an argument into the message buffer. */
void in (unsigned int count, enum __ioctl_datum type)
--
2.30.0
