Description:
------------
A fresh minimal build of PHP on Fedora 33 produces one test failure with the following test:
Test disk_free_space and its alias diskfreespace() functions : basic functionality [ext/standard/tests/file/disk_free_space_basic.phpt]

DIFF:
--
     
      Free Space after writing to a file
     float(%f)
012+  Free Space Value Is Incorrect
013+ float(982391926784)
014+ float(982391926784)
012-  Free Space Value Is Correct
     *** Testing with Binary Input ***
     float(%f)
     
--

Test script:
---------------
<?php
$file_path = __DIR__;

echo "*** Testing with existing directory ***\n";
var_dump( disk_free_space($file_path) );
var_dump( diskfreespace($file_path) );

echo "*** Testing with newly created directory ***\n";
$dir = "/disk_free_space";
mkdir($file_path.$dir);
echo" \n Free Space before writing to a file\n";
$space1 =  disk_free_space($file_path.$dir);
var_dump( $space1 );

$fh = fopen($file_path.$dir."/disk_free_space.tmp", "a");
$data = str_repeat("x", 0xffff);
fwrite($fh, $data);
fclose($fh);

echo "\n Free Space after writing to a file\n";
$space2 =  disk_free_space($file_path.$dir);
var_dump( $space2 );

if($space1 > $space2 )
  echo "\n Free Space Value Is Correct\n";
else {
  echo "\n Free Space Value Is Incorrect\n";
  var_dump($space1, $space2);
}

echo "*** Testing with Binary Input ***\n";
var_dump( disk_free_space(b"$file_path") );

echo"\n--- Done ---";
?>

Expected result:
----------------
--EXPECTF--
*** Testing with existing directory ***
float(%f)
float(%f)
*** Testing with newly created directory ***
 
 Free Space before writing to a file
float(%f)

 Free Space after writing to a file
float(%f)

 Free Space Value Is Correct
*** Testing with Binary Input ***
float(%f)

--- Done ---

Actual result:
--------------
*** Testing with existing directory ***
float(982391926784)
float(982391926784)
*** Testing with newly created directory ***
 
 Free Space before writing to a file
float(982391926784)

 Free Space after writing to a file
float(982391926784)

 Free Space Value Is Incorrect
float(982391926784)
float(982391926784)
*** Testing with Binary Input ***
float(982391926784)

--- Done ---