[PATCH] nanosleep: Pass NULL when rem == NULL on ports with __TIMESIZE != 64

[Lukasz Majewski]

On ports with __TIMESIZE != 64 the remaining time argument always receives
pointer to struct __timespec64 instance. This is the different behavior
when compared to 64 bit versions of clock_nanosleep and nanosleep
functions, which receive NULL.

To avoid any potential issues, we also pass NULL when *rem pointer is
NULL.

Reported-by: Andreas Schwab <schwab@suse.de>
---
 sysdeps/unix/sysv/linux/clock_nanosleep.c | 3 ++-
 sysdeps/unix/sysv/linux/nanosleep.c       | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/sysdeps/unix/sysv/linux/clock_nanosleep.c b/sysdeps/unix/sysv/linux/clock_nanosleep.c
index 6ad3321435..82cd11a564 100644
--- a/sysdeps/unix/sysv/linux/clock_nanosleep.c
+++ b/sysdeps/unix/sysv/linux/clock_nanosleep.c
@@ -78,7 +78,8 @@ __clock_nanosleep (clockid_t clock_id, int flags, const struct timespec *req,
   struct __timespec64 treq64, trem64;
 
   treq64 = valid_timespec_to_timespec64 (*req);
-  r = __clock_nanosleep_time64 (clock_id, flags, &treq64, &trem64);
+  r = __clock_nanosleep_time64 (clock_id, flags, &treq64,
+                                rem != NULL ? &trem64 : NULL);
 
   if (r == EINTR && rem != NULL && (flags & TIMER_ABSTIME) == 0)
     *rem = valid_timespec64_to_timespec (trem64);
diff --git a/sysdeps/unix/sysv/linux/nanosleep.c b/sysdeps/unix/sysv/linux/nanosleep.c
index 8f4ee0f744..e58815c4d0 100644
--- a/sysdeps/unix/sysv/linux/nanosleep.c
+++ b/sysdeps/unix/sysv/linux/nanosleep.c
@@ -39,7 +39,7 @@ __nanosleep (const struct timespec *req, struct timespec *rem)
   struct __timespec64 treq64, trem64;
 
   treq64 = valid_timespec_to_timespec64 (*req);
-  int ret = __nanosleep64 (&treq64, &trem64);
+  int ret = __nanosleep64 (&treq64, rem != NULL ? &trem64 : NULL);
 
   if (ret != 0 && errno == EINTR && rem != NULL)
     *rem = valid_timespec64_to_timespec (trem64);
-- 
2.20.1