[glibc] Linux: consolidate link implementation

[Adhemerval Zanella <azanella@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=f178e5173f737c33f421a7a994a3ab67a8a4eb86

commit f178e5173f737c33f421a7a994a3ab67a8a4eb86
Author: Adhemerval Zanella Netto <adhemerval.zanella@linaro.org>
Date:   Wed Oct 19 19:14:12 2022 -0300

    Linux: consolidate link implementation
    
    Use link syscall if defined, otherwise use linkat.
    
    Checked on x86_64-linux-gnu.
    Reviewed-by: Carlos O'Donell <carlos@redhat.com>
    Tested-by: Carlos O'Donell <carlos@redhat.com>

Diff:
---
 sysdeps/unix/sysv/linux/{generic => }/link.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/sysdeps/unix/sysv/linux/generic/link.c b/sysdeps/unix/sysv/linux/link.c
similarity index 78%
rename from sysdeps/unix/sysv/linux/generic/link.c
rename to sysdeps/unix/sysv/linux/link.c
index e07655d521..eb4fe1569e 100644
--- a/sysdeps/unix/sysv/linux/generic/link.c
+++ b/sysdeps/unix/sysv/linux/link.c
@@ -1,4 +1,5 @@
-/* Copyright (C) 2011-2022 Free Software Foundation, Inc.
+/* Make a new name for a file.  Linux version.
+   Copyright (C) 2011-2022 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -23,7 +24,11 @@
 int
 __link (const char *from, const char *to)
 {
-  return INLINE_SYSCALL (linkat, 5, AT_FDCWD, from, AT_FDCWD, to, 0);
+#ifdef __NR_link
+  return INLINE_SYSCALL_CALL (link, from, to);
+#else
+  return INLINE_SYSCALL_CALL (linkat, AT_FDCWD, from, AT_FDCWD, to, 0);
+#endif
 }
 
 weak_alias (__link, link)