[glibc] Refactor adjtimex based on clock_adjtime

[glibc] Refactor adjtimex based on clock_adjtime

[Adhemerval Zanella]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=c81aa64e81826c308c4ecbd1982fa086ca6e647b

commit c81aa64e81826c308c4ecbd1982fa086ca6e647b
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Mon Oct 28 14:55:22 2019 -0300

    Refactor adjtimex based on clock_adjtime
    
    Checked on x86_64-linux-gnu.
    
    Reviewed-by: Florian Weimer <fweimer@redhat.com>

Diff:
---
 include/time.h                        | 5 +++++
 sysdeps/unix/sysv/linux/adjtimex.c    | 2 +-
 sysdeps/unix/sysv/linux/syscalls.list | 2 +-
 3 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/include/time.h b/include/time.h
index caf562a..000672e 100644
--- a/include/time.h
+++ b/include/time.h
@@ -25,6 +25,11 @@ libc_hidden_proto (__clock_gettime)
 extern __typeof (clock_settime) __clock_settime;
 libc_hidden_proto (__clock_settime)
 
+#ifdef __linux__
+extern __typeof (clock_adjtime) __clock_adjtime;
+libc_hidden_proto (__clock_adjtime);
+#endif
+
 /* Now define the internal interfaces.  */
 struct tm;
 
diff --git a/sysdeps/unix/sysv/linux/adjtimex.c b/sysdeps/unix/sysv/linux/adjtimex.c
index 6d62c72..95be503 100644
--- a/sysdeps/unix/sysv/linux/adjtimex.c
+++ b/sysdeps/unix/sysv/linux/adjtimex.c
@@ -22,7 +22,7 @@
 int
 ___adjtimex (struct timex *buf)
 {
-  return INLINE_SYSCALL_CALL (adjtimex, buf);
+  return __clock_adjtime (CLOCK_REALTIME, buf);
 }
 
 #ifdef VERSION_adjtimex
diff --git a/sysdeps/unix/sysv/linux/syscalls.list b/sysdeps/unix/sysv/linux/syscalls.list
index 70b1109..603e517 100644
--- a/sysdeps/unix/sysv/linux/syscalls.list
+++ b/sysdeps/unix/sysv/linux/syscalls.list
@@ -4,7 +4,7 @@ alarm		-	alarm		i:i	alarm
 bdflush		EXTRA	bdflush		i:ii	__compat_bdflush	bdflush@GLIBC_2.0:GLIBC_2.23
 capget		EXTRA	capget		i:pp	capget
 capset		EXTRA	capset		i:pp	capset
-clock_adjtime	EXTRA	clock_adjtime	i:ip	clock_adjtime
+clock_adjtime	EXTRA	clock_adjtime	i:ip	__clock_adjtime		clock_adjtime
 create_module	EXTRA	create_module	3	__compat_create_module	create_module@GLIBC_2.0:GLIBC_2.23
 delete_module	EXTRA	delete_module	3	delete_module
 epoll_create	EXTRA	epoll_create	i:i	epoll_create