[COMMITTED] Fix Linux fallocate tests for EOPNOTSUPP

[Adhemerval Zanella <adhemerval dot zanella at linaro dot org>]

The fallocate syscall might fail on Linux due missing support from
underlying filesystem (for instance some NFS versions).  This patch
adds this check for fallocate tests.  It also moves tst-fallocate{64}
to 'io' folder (since it is on fallocate{64} is built).

Checked on x86_64.

	* sysdeps/unix/sysv/linux/Makefile [$(subdir) = math] (tests): Move
	tst-fallocate{64}.
	* sysdeps/unix/sysv/linux/tst-fallocate-common.c: Check for EOPNOTSUPP
	on syscall return.
---
 ChangeLog                                      | 7 +++++++
 sysdeps/unix/sysv/linux/Makefile               | 4 +++-
 sysdeps/unix/sysv/linux/tst-fallocate-common.c | 8 +++++++-
 3 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile
index 101e120..e329a6b 100644
--- a/sysdeps/unix/sysv/linux/Makefile
+++ b/sysdeps/unix/sysv/linux/Makefile
@@ -43,7 +43,7 @@ sysdep_headers += sys/mount.h sys/acct.h sys/sysctl.h \
 		  bits/mman-linux.h
 
 tests += tst-clone tst-clone2 tst-fanotify tst-personality tst-quota \
-	 tst-fallocate tst-fallocate64 tst-sync_file_range
+	 tst-sync_file_range
 
 # Generate the list of SYS_* macros for the system calls (__NR_* macros).
 
@@ -173,6 +173,8 @@ ifeq ($(subdir),io)
 sysdep_routines += xstatconv internal_statvfs internal_statvfs64 \
 		   sync_file_range fallocate fallocate64
 sysdep_headers += bits/fcntl-linux.h
+
+tests += tst-fallocate tst-fallocate64
 endif
 
 ifeq ($(subdir),elf)
diff --git a/sysdeps/unix/sysv/linux/tst-fallocate-common.c b/sysdeps/unix/sysv/linux/tst-fallocate-common.c
index 9879488..d98bf4a 100644
--- a/sysdeps/unix/sysv/linux/tst-fallocate-common.c
+++ b/sysdeps/unix/sysv/linux/tst-fallocate-common.c
@@ -58,7 +58,13 @@ do_test_with_offset (off_t offset)
      and check if both buffer have the same contents.  */
   ret = fallocate (temp_fd, 0, offset, BLK_SIZE);
   if (ret == -1)
-    FAIL_EXIT1 ("fallocate failed");
+    {
+      /* fallocate might not be fully supported by underlying filesystem (for
+	 instance some NFS versions).   */
+      if (errno == EOPNOTSUPP)
+	FAIL_EXIT (77, "fallocate not supported");
+      FAIL_EXIT1 ("fallocate failed");
+    }
 
   ret = fstat (temp_fd, &finfo);
   if (ret == -1)
-- 
2.7.4