linux: Consolidate fstatvfs implementations

There is no need to handle ENOSYS on fstatfs64 call, required only
for alpha (where is already fallbacks to fstatfs).  The wordsize
internal_statvfs64.c is removed, since how the LFS support is
provided by fstatvfs64.c (used on 64-bit architectures as well).

Checked on x86_64-linux-gnu.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>

1 files changed, 19 insertions, 34 deletions

diff --git a/sysdeps/unix/sysv/linux/fstatvfs64.c b/sysdeps/unix/sysv/linux/fstatvfs64.c
index 6d2dbc5285..b95745e8b8 100644
--- a/sysdeps/unix/sysv/linux/fstatvfs64.c
+++ b/sysdeps/unix/sysv/linux/fstatvfs64.c
@@ -16,48 +16,33 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
-#include <errno.h>
-#include <string.h>
-#include <sys/stat.h>
+#define __fstatvfs __fstatvfs_disable
+#define fstatvfs fstatvfs_disable
+#include <sys/statvfs.h>
 #include <sys/statfs.h>
-#include "internal_statvfs.h"
-#include <kernel-features.h>
+#include <internal_statvfs.h>
+#include <time.h>
+#include <kernel_stat.h>
 
 /* Return information about the filesystem on which FD resides.  */
 int
 __fstatvfs64 (int fd, struct statvfs64 *buf)
 {
   struct statfs64 fsbuf;
-  int res = __fstatfs64 (fd, &fsbuf);
-
-#ifndef __ASSUME_STATFS64
-  if (res < 0 && errno == ENOSYS)
-    {
-      struct statvfs buf32;
-
-      res = fstatvfs (fd, &buf32);
-      if (res == 0)
-	{
-	  buf->f_bsize = buf32.f_bsize;
-	  buf->f_frsize = buf32.f_frsize;
-	  buf->f_blocks = buf32.f_blocks;
-	  buf->f_bfree = buf32.f_bfree;
-	  buf->f_bavail = buf32.f_bavail;
-	  buf->f_files = buf32.f_files;
-	  buf->f_ffree = buf32.f_ffree;
-	  buf->f_favail = buf32.f_favail;
-	  buf->f_fsid = buf32.f_fsid;
-	  buf->f_flag = buf32.f_flag;
-	  buf->f_namemax = buf32.f_namemax;
-	  memcpy (buf->__f_spare, buf32.__f_spare, sizeof (buf32.__f_spare));
-	}
-    }
-#endif
+  if (__fstatfs64 (fd, &fsbuf) < 0)
+    return -1;
 
-  if (res == 0)
-    /* Convert the result.  */
-    __internal_statvfs64 (NULL, buf, &fsbuf, fd);
+  /* Convert the result.  */
+  __internal_statvfs64 (NULL, buf, &fsbuf, fd);
 
-  return res;
+  return 0;
 }
 weak_alias (__fstatvfs64, fstatvfs64)
+
+#undef __fstatvfs
+#undef fstatvfs
+
+#if STATFS_IS_STATFS64
+weak_alias (__fstatvfs64, __fstatvfs)
+weak_alias (__fstatvfs64, fstatvfs)
+#endif