[glibc] linux: Remove overflow.h

[Adhemerval Zanella <azanella@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=d2fa24f2395db7767e43a42b5f891fe3d2dfb6b6

commit d2fa24f2395db7767e43a42b5f891fe3d2dfb6b6
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Sun Feb 7 18:45:12 2021 +0000

    linux: Remove overflow.h
    
    The header is not used anywhere.
    
    Reviewed-by: Carlos O'Donell <carlos@redhat.com>

Diff:
---
 .../unix/sysv/linux/generic/wordsize-32/overflow.h | 69 ----------------------
 1 file changed, 69 deletions(-)

diff --git a/sysdeps/unix/sysv/linux/generic/wordsize-32/overflow.h b/sysdeps/unix/sysv/linux/generic/wordsize-32/overflow.h
deleted file mode 100644
index f2a58d654f..0000000000
--- a/sysdeps/unix/sysv/linux/generic/wordsize-32/overflow.h
+++ /dev/null
@@ -1,69 +0,0 @@
-/* Overflow tests for stat, statfs, and lseek functions.
-   Copyright (C) 2011-2021 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
-
-   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
-   <https://www.gnu.org/licenses/>.  */
-
-#include <sys/stat.h>
-#include <sys/statfs.h>
-#include <sys/types.h>
-
-/* Test for overflows of structures where we ask the kernel to fill them
-   in with standard 64-bit syscalls but return them through APIs that
-   only expose the low 32 bits of some fields.  */
-
-static inline off_t lseek_overflow (loff_t res)
-{
-  off_t retval = (off_t) res;
-  if (retval == res)
-    return retval;
-
-  __set_errno (EOVERFLOW);
-  return (off_t) -1;
-}
-
-static inline int stat_overflow (struct stat *buf)
-{
-#if defined __INO_T_MATCHES_INO64_T
-  return 0;
-#else
-  if (buf->__st_ino_pad == 0 && buf->__st_size_pad == 0
-      && buf->__st_blocks_pad == 0)
-    return 0;
-
-  __set_errno (EOVERFLOW);
-  return -1;
-#endif
-}
-
-/* Note that f_files and f_ffree may validly be a sign-extended -1.  */
-static inline int statfs_overflow (struct statfs *buf)
-{
-#if __STATFS_MATCHES_STATFS64
-  return 0;
-#else
-  if (buf->__f_blocks_pad == 0 && buf->__f_bfree_pad == 0
-      && buf->__f_bavail_pad == 0
-      && (buf->__f_files_pad == 0
-	  || (buf->f_files == -1U && buf->__f_files_pad == -1))
-      && (buf->__f_ffree_pad == 0
-	  || (buf->f_ffree == -1U && buf->__f_ffree_pad == -1)))
-    return 0;
-
-  __set_errno (EOVERFLOW);
-  return -1;
-#endif
-}