[glibc/azanella/y2038] linux: Add pwrite64_nocancel

[Adhemerval Zanella <azanella@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=9e762e39d40e2fdbbc87bd23e6a70e4f5b71fd7c

commit 9e762e39d40e2fdbbc87bd23e6a70e4f5b71fd7c
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Tue Aug 4 14:29:47 2020 -0300

    linux: Add pwrite64_nocancel
    
    It is not used internally yet.

Diff:
---
 sysdeps/unix/sysv/linux/Makefile            |  2 +-
 sysdeps/unix/sysv/linux/not-cancel.h        |  4 ++++
 sysdeps/unix/sysv/linux/pwrite64_nocancel.c | 29 +++++++++++++++++++++++++++++
 3 files changed, 34 insertions(+), 1 deletion(-)

diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile
index 488114a41e..eca24cdfe8 100644
--- a/sysdeps/unix/sysv/linux/Makefile
+++ b/sysdeps/unix/sysv/linux/Makefile
@@ -278,7 +278,7 @@ sysdep_routines += xstatconv internal_statvfs \
 		   close_nocancel fcntl_nocancel \
 		   open_nocancel open64_nocancel \
 		   openat_nocancel openat64_nocancel \
-		   read_nocancel pread64_nocancel \
+		   read_nocancel pread64_nocancel pwrite64_nocancel \
 		   write_nocancel statx_cp stat_t64_cp
 
 sysdep_headers += bits/fcntl-linux.h
diff --git a/sysdeps/unix/sysv/linux/not-cancel.h b/sysdeps/unix/sysv/linux/not-cancel.h
index f06d57426a..27bb3811af 100644
--- a/sysdeps/unix/sysv/linux/not-cancel.h
+++ b/sysdeps/unix/sysv/linux/not-cancel.h
@@ -46,6 +46,9 @@ __typeof (__read) __read_nocancel;
 /* Non cancellable pread syscall (LFS version).  */
 __typeof (__pread64) __pread64_nocancel;
 
+/* Non cancellable pwrite syscall (LFS version).  */
+__typeof (__pwrite64) __pwrite64_nocancel;
+
 /* Uncancelable write.  */
 __typeof (__write) __write_nocancel;
 
@@ -78,6 +81,7 @@ hidden_proto (__openat_nocancel)
 hidden_proto (__openat64_nocancel)
 hidden_proto (__read_nocancel)
 hidden_proto (__pread64_nocancel)
+hidden_proto (__pwrite64_nocancel)
 hidden_proto (__write_nocancel)
 hidden_proto (__close_nocancel)
 hidden_proto (__fcntl64_nocancel)
diff --git a/sysdeps/unix/sysv/linux/pwrite64_nocancel.c b/sysdeps/unix/sysv/linux/pwrite64_nocancel.c
new file mode 100644
index 0000000000..06d0ae14d0
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/pwrite64_nocancel.c
@@ -0,0 +1,29 @@
+/* Linux pwrite64() syscall implementation -- non-cancellable.
+   Copyright (C) 2020 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
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <unistd.h>
+#include <sysdep-cancel.h>
+#include <not-cancel.h>
+
+ssize_t
+__pwrite64_nocancel (int fd, const void *buf, size_t count, off64_t offset)
+{
+  return INLINE_SYSCALL_CALL (pwrite64, fd, buf, count,
+			      SYSCALL_LL64_PRW (offset));
+}
+hidden_def (__pwrite64_nocancel)