[glibc] linux: Simplify timer_gettime

[Adhemerval Zanella <azanella@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=70746a06c2de7c8183a94379437779991d35266d

commit 70746a06c2de7c8183a94379437779991d35266d
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Fri Jul 10 15:05:51 2020 -0300

    linux: Simplify timer_gettime
    
    With arch-syscall.h it can now assumes the existance of either
    __NR_timer_gettime or __NR_time_gettime_time64.  The 32-bit time_t
    support is now only build for !__ASSUME_TIME64_SYSCALLS.
    
    Checked on x86_64-linux-gnu and i686-linux-gnu (on 5.4 and on 4.15
    kernel).
    
    Reviewed-by: Lukasz Majewski <lukma@denx.de>

Diff:
---
 sysdeps/unix/sysv/linux/timer_gettime.c | 20 ++++++++------------
 1 file changed, 8 insertions(+), 12 deletions(-)

diff --git a/sysdeps/unix/sysv/linux/timer_gettime.c b/sysdeps/unix/sysv/linux/timer_gettime.c
index 1e07d4845b..5d31c7c864 100644
--- a/sysdeps/unix/sysv/linux/timer_gettime.c
+++ b/sysdeps/unix/sysv/linux/timer_gettime.c
@@ -28,27 +28,23 @@ __timer_gettime64 (timer_t timerid, struct __itimerspec64 *value)
 {
   struct timer *kt = (struct timer *) timerid;
 
-#ifdef __ASSUME_TIME64_SYSCALLS
-# ifndef __NR_timer_gettime64
-#  define __NR_timer_gettime64 __NR_timer_gettime
-# endif
-  return INLINE_SYSCALL_CALL (timer_gettime64, kt->ktimerid, value);
-#else
-# ifdef __NR_timer_gettime64
+#ifndef __NR_timer_gettime64
+# define __NR_timer_gettime64 __NR_timer_gettime
+#endif
   int ret = INLINE_SYSCALL_CALL (timer_gettime64, kt->ktimerid, value);
+#ifndef __ASSUME_TIME64_SYSCALLS
   if (ret == 0 || errno != ENOSYS)
     return ret;
-# endif
+
   struct itimerspec its32;
-  int retval = INLINE_SYSCALL_CALL (timer_gettime, kt->ktimerid, &its32);
-  if (retval == 0)
+  ret = INLINE_SYSCALL_CALL (timer_gettime, kt->ktimerid, &its32);
+  if (ret == 0)
     {
       value->it_interval = valid_timespec_to_timespec64 (its32.it_interval);
       value->it_value = valid_timespec_to_timespec64 (its32.it_value);
     }
-
-  return retval;
 #endif
+  return ret;
 }
 
 #if __TIMESIZE != 64