1 files changed, 74 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/posix_fadvise.c b/REORG.TODO/sysdeps/unix/sysv/linux/posix_fadvise.c
new file mode 100644
index 0000000000..222ac978e2
--- /dev/null
+++ b/REORG.TODO/sysdeps/unix/sysv/linux/posix_fadvise.c
@@ -0,0 +1,74 @@
+/* Copyright (C) 2003-2017 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 <errno.h>
+#include <fcntl.h>
+#include <sysdep.h>
+
+/* Advice the system about the expected behaviour of the application with
+   respect to the file associated with FD.  */
+
+#ifndef __OFF_T_MATCHES_OFF64_T
+
+/* Default implementation will use __NR_fadvise64 with expected argument
+   positions (for instance i386 and powerpc32 that uses __ALIGNMENT_ARG).
+
+   Second option will be used by arm which define __NR_arm_fadvise64_64
+   (redefined to __NR_fadvise64_64 in kernel-features.h) that behaves as
+   __NR_fadvise64_64 (without the aligment argument required for the ABI).
+
+   Third option will be used by both tile 32-bits and mips o32.  Tile
+   will set __ASSUME_FADVISE64_64_NO_ALIGN to issue a 6 argument syscall,
+   while mips will use a 7 argument one with __NR_fadvise64.
+
+   s390 implements fadvice64_64 using a specific struct with arguments
+   packed inside.  This is the only implementation handled in arch-specific
+   code.  */
+
+int
+posix_fadvise (int fd, off_t offset, off_t len, int advise)
+{
+  INTERNAL_SYSCALL_DECL (err);
+# if defined (__NR_fadvise64) && !defined (__ASSUME_FADVISE64_AS_64_64)
+  int ret = INTERNAL_SYSCALL_CALL (fadvise64, err, fd,
+				   __ALIGNMENT_ARG SYSCALL_LL (offset),
+				   len, advise);
+# else
+#  ifdef __ASSUME_FADVISE64_64_6ARG
+  int ret = INTERNAL_SYSCALL_CALL (fadvise64_64, err, fd, advise,
+				   SYSCALL_LL (offset), SYSCALL_LL (len));
+#  else
+
+#   ifdef __ASSUME_FADVISE64_64_NO_ALIGN
+#    undef __ALIGNMENT_ARG
+#    define __ALIGNMENT_ARG
+#   endif
+
+#   ifndef __NR_fadvise64_64
+#    define __NR_fadvise64_64 __NR_fadvise64
+#   endif
+
+  int ret = INTERNAL_SYSCALL_CALL (fadvise64_64, err, fd,
+				   __ALIGNMENT_ARG SYSCALL_LL (offset),
+				   SYSCALL_LL (len), advise);
+#  endif
+# endif
+  if (INTERNAL_SYSCALL_ERROR_P (ret, err))
+    return INTERNAL_SYSCALL_ERRNO (ret, err);
+  return 0;
+}
+#endif /* __OFF_T_MATCHES_OFF64_T  */